./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP --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 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:42:45,715 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:42:45,784 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:42:45,789 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:42:45,790 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:42:45,815 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:42:45,815 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:42:45,816 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:42:45,817 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:42:45,817 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:42:45,818 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:42:45,819 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:42:45,819 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:42:45,820 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:42:45,820 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:42:45,821 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:42:45,821 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:42:45,822 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:42:45,822 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:42:45,823 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:42:45,823 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:42:45,824 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:42:45,824 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:42:45,825 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:42:45,825 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:42:45,825 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:42:45,826 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:42:45,826 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:42:45,827 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:42:45,827 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:42:45,827 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:42:45,828 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:42:45,828 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:42:45,828 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:42:45,828 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:42:45,829 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:42:45,829 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:42:45,829 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:42:45,829 INFO L153 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_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 [2023-11-06 22:42:46,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:42:46,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:42:46,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:42:46,126 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:42:46,126 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:42:46,128 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2023-11-06 22:42:49,345 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:42:49,606 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:42:49,607 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2023-11-06 22:42:49,617 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/data/f8f2bcea0/e0070788686643b69e23bb41375d1bad/FLAGac8600fdc [2023-11-06 22:42:49,633 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/data/f8f2bcea0/e0070788686643b69e23bb41375d1bad [2023-11-06 22:42:49,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:42:49,637 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:42:49,639 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:42:49,639 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:42:49,644 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:42:49,645 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:49" (1/1) ... [2023-11-06 22:42:49,646 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c801c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:49, skipping insertion in model container [2023-11-06 22:42:49,646 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:49" (1/1) ... [2023-11-06 22:42:49,674 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:42:49,888 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:42:49,901 ERROR L324 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) [2023-11-06 22:42:49,902 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@896968b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:49, skipping insertion in model container [2023-11-06 22:42:49,902 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:42:49,902 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 22:42:49,904 INFO L158 Benchmark]: Toolchain (without parser) took 266.15ms. Allocated memory is still 138.4MB. Free memory was 107.1MB in the beginning and 96.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:42:49,905 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 111.1MB. Free memory is still 66.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:42:49,906 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.76ms. Allocated memory is still 138.4MB. Free memory was 107.1MB in the beginning and 96.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:42:49,907 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 111.1MB. Free memory is still 66.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 263.76ms. Allocated memory is still 138.4MB. Free memory was 107.1MB in the beginning and 96.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 122]: 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_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP --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 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:42:52,469 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:42:52,585 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 22:42:52,598 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:42:52,599 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:42:52,640 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:42:52,641 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:42:52,641 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:42:52,642 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:42:52,643 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:42:52,643 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:42:52,644 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:42:52,644 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:42:52,645 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:42:52,646 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:42:52,646 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:42:52,647 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:42:52,647 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:42:52,648 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:42:52,648 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:42:52,649 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:42:52,650 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:42:52,651 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:42:52,651 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 22:42:52,652 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 22:42:52,652 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:42:52,652 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:42:52,653 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:42:52,653 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:42:52,654 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:42:52,654 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:42:52,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:42:52,655 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:42:52,656 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:42:52,656 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 22:42:52,656 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 22:42:52,657 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:42:52,657 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:42:52,658 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:42:52,658 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 22:42:52,659 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:42:52,660 INFO L153 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_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 [2023-11-06 22:42:53,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:42:53,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:42:53,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:42:53,127 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:42:53,128 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:42:53,129 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2023-11-06 22:42:56,504 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:42:56,813 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:42:56,815 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2023-11-06 22:42:56,827 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/data/4cb1699c5/88a82366021a4997b90de7f4274962a6/FLAG3316129e9 [2023-11-06 22:42:56,850 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/data/4cb1699c5/88a82366021a4997b90de7f4274962a6 [2023-11-06 22:42:56,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:42:56,858 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:42:56,862 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:42:56,862 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:42:56,868 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:42:56,869 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:56" (1/1) ... [2023-11-06 22:42:56,870 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17fbe61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:56, skipping insertion in model container [2023-11-06 22:42:56,870 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:56" (1/1) ... [2023-11-06 22:42:56,916 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:42:57,208 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:42:57,235 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 22:42:57,248 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:42:57,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:42:57,300 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:42:57,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:42:57,350 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:42:57,351 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57 WrapperNode [2023-11-06 22:42:57,351 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:42:57,352 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:42:57,352 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:42:57,352 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:42:57,360 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (1/1) ... [2023-11-06 22:42:57,385 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (1/1) ... [2023-11-06 22:42:57,415 INFO L138 Inliner]: procedures = 27, calls = 35, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 216 [2023-11-06 22:42:57,416 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:42:57,417 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:42:57,417 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:42:57,417 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:42:57,427 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (1/1) ... [2023-11-06 22:42:57,427 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (1/1) ... [2023-11-06 22:42:57,432 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (1/1) ... [2023-11-06 22:42:57,433 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (1/1) ... [2023-11-06 22:42:57,445 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (1/1) ... [2023-11-06 22:42:57,459 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (1/1) ... [2023-11-06 22:42:57,462 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (1/1) ... [2023-11-06 22:42:57,465 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (1/1) ... [2023-11-06 22:42:57,469 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:42:57,486 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:42:57,486 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:42:57,487 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:42:57,488 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (1/1) ... [2023-11-06 22:42:57,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:42:57,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:57,535 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:42:57,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:42:57,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:42:57,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 22:42:57,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:42:57,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 22:42:57,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:42:57,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:42:57,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:42:57,590 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:42:57,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:42:57,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:42:57,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:42:57,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:42:57,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 22:42:57,595 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:42:57,726 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:42:57,728 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:42:58,452 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:42:58,465 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:42:58,465 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:42:58,468 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:58 BoogieIcfgContainer [2023-11-06 22:42:58,468 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:42:58,471 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:42:58,471 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:42:58,474 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:42:58,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:42:56" (1/3) ... [2023-11-06 22:42:58,475 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3529e37d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:58, skipping insertion in model container [2023-11-06 22:42:58,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (2/3) ... [2023-11-06 22:42:58,476 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3529e37d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:58, skipping insertion in model container [2023-11-06 22:42:58,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:58" (3/3) ... [2023-11-06 22:42:58,477 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2023-11-06 22:42:58,496 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:42:58,497 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-06 22:42:58,497 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:42:58,650 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:42:58,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 279 places, 291 transitions, 596 flow [2023-11-06 22:42:58,898 INFO L124 PetriNetUnfolderBase]: 19/289 cut-off events. [2023-11-06 22:42:58,899 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:42:58,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 289 events. 19/289 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 570 event pairs, 0 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 182. Up to 2 conditions per place. [2023-11-06 22:42:58,910 INFO L82 GeneralOperation]: Start removeDead. Operand has 279 places, 291 transitions, 596 flow [2023-11-06 22:42:58,926 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 272 places, 284 transitions, 580 flow [2023-11-06 22:42:58,930 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:42:58,946 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 272 places, 284 transitions, 580 flow [2023-11-06 22:42:58,950 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 272 places, 284 transitions, 580 flow [2023-11-06 22:42:58,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 284 transitions, 580 flow [2023-11-06 22:42:59,032 INFO L124 PetriNetUnfolderBase]: 19/284 cut-off events. [2023-11-06 22:42:59,033 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:42:59,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 284 events. 19/284 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 571 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 182. Up to 2 conditions per place. [2023-11-06 22:42:59,050 INFO L119 LiptonReduction]: Number of co-enabled transitions 13680 [2023-11-06 22:43:23,367 INFO L134 LiptonReduction]: Checked pairs total: 12397 [2023-11-06 22:43:23,368 INFO L136 LiptonReduction]: Total number of compositions: 334 [2023-11-06 22:43:23,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:43:23,387 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;@6e4fc15b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:43:23,387 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-06 22:43:23,390 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:43:23,391 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:43:23,391 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:43:23,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:23,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:43:23,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:23,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:23,398 INFO L85 PathProgramCache]: Analyzing trace with hash 37478, now seen corresponding path program 1 times [2023-11-06 22:43:23,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:23,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093705143] [2023-11-06 22:43:23,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:23,411 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 [2023-11-06 22:43:23,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:23,422 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:23,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:23,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:43:23,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:23,661 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:43:23,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:23,680 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:23,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:23,713 INFO L351 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 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:43:23,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:23,727 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:23,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:23,735 INFO L351 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:23,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:23,745 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:23,761 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:23,761 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:23,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093705143] [2023-11-06 22:43:23,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093705143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:23,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:23,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:43:23,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842087807] [2023-11-06 22:43:23,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:23,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:43:23,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:23,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:43:23,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:43:23,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 625 [2023-11-06 22:43:23,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 263.6666666666667) internal successors, (791), 3 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:23,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:23,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 625 [2023-11-06 22:43:23,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:24,296 INFO L124 PetriNetUnfolderBase]: 220/370 cut-off events. [2023-11-06 22:43:24,297 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-06 22:43:24,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 762 conditions, 370 events. 220/370 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1272 event pairs, 168 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 640. Up to 369 conditions per place. [2023-11-06 22:43:24,301 INFO L140 encePairwiseOnDemand]: 618/625 looper letters, 31 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2023-11-06 22:43:24,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 36 transitions, 156 flow [2023-11-06 22:43:24,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:43:24,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:43:24,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 827 transitions. [2023-11-06 22:43:24,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44106666666666666 [2023-11-06 22:43:24,332 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 827 transitions. [2023-11-06 22:43:24,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 827 transitions. [2023-11-06 22:43:24,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:24,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 827 transitions. [2023-11-06 22:43:24,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:24,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:24,362 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:24,365 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 827 transitions. [2023-11-06 22:43:24,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 36 transitions, 156 flow [2023-11-06 22:43:24,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 36 transitions, 148 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:43:24,373 INFO L231 Difference]: Finished difference. Result has 34 places, 35 transitions, 99 flow [2023-11-06 22:43:24,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=34, PETRI_TRANSITIONS=35} [2023-11-06 22:43:24,381 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2023-11-06 22:43:24,381 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 35 transitions, 99 flow [2023-11-06 22:43:24,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 263.6666666666667) internal successors, (791), 3 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:24,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:24,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:43:24,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:24,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:24,594 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:24,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:24,595 INFO L85 PathProgramCache]: Analyzing trace with hash 37588, now seen corresponding path program 1 times [2023-11-06 22:43:24,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:24,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836502261] [2023-11-06 22:43:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:24,596 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 [2023-11-06 22:43:24,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:24,601 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:24,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:24,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:43:24,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:24,699 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:24,700 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:24,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836502261] [2023-11-06 22:43:24,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836502261] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:24,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:24,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:43:24,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472612313] [2023-11-06 22:43:24,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:24,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:43:24,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:24,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:43:24,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:43:24,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 625 [2023-11-06 22:43:24,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 35 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:24,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:24,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 625 [2023-11-06 22:43:24,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:25,056 INFO L124 PetriNetUnfolderBase]: 217/367 cut-off events. [2023-11-06 22:43:25,056 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:43:25,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 367 events. 217/367 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1267 event pairs, 168 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 739. Up to 366 conditions per place. [2023-11-06 22:43:25,060 INFO L140 encePairwiseOnDemand]: 620/625 looper letters, 31 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-11-06 22:43:25,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 152 flow [2023-11-06 22:43:25,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:43:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:43:25,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 834 transitions. [2023-11-06 22:43:25,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448 [2023-11-06 22:43:25,066 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 834 transitions. [2023-11-06 22:43:25,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 834 transitions. [2023-11-06 22:43:25,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:25,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 834 transitions. [2023-11-06 22:43:25,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.0) internal successors, (834), 3 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:25,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:25,080 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:25,080 INFO L175 Difference]: Start difference. First operand has 34 places, 35 transitions, 99 flow. Second operand 3 states and 834 transitions. [2023-11-06 22:43:25,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 152 flow [2023-11-06 22:43:25,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 33 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:43:25,083 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 86 flow [2023-11-06 22:43:25,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-11-06 22:43:25,084 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2023-11-06 22:43:25,084 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 86 flow [2023-11-06 22:43:25,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:25,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:25,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:43:25,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:25,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:25,299 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:25,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:25,300 INFO L85 PathProgramCache]: Analyzing trace with hash 37477, now seen corresponding path program 1 times [2023-11-06 22:43:25,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:25,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221714400] [2023-11-06 22:43:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:25,301 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 [2023-11-06 22:43:25,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:25,308 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:25,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:25,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:43:25,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:25,398 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:43:25,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:25,410 INFO L351 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:25,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:25,429 INFO L351 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 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:43:25,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:25,438 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:25,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:25,447 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:25,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:25,453 INFO L351 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:25,457 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:25,457 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:25,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221714400] [2023-11-06 22:43:25,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221714400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:25,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:25,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:43:25,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191133371] [2023-11-06 22:43:25,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:25,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:43:25,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:25,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:43:25,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:43:25,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 625 [2023-11-06 22:43:25,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 265.6666666666667) internal successors, (797), 3 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:25,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:25,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 625 [2023-11-06 22:43:25,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:25,839 INFO L124 PetriNetUnfolderBase]: 217/365 cut-off events. [2023-11-06 22:43:25,839 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:43:25,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 749 conditions, 365 events. 217/365 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1264 event pairs, 168 based on Foata normal form. 2/149 useless extension candidates. Maximal degree in co-relation 737. Up to 362 conditions per place. [2023-11-06 22:43:25,842 INFO L140 encePairwiseOnDemand]: 620/625 looper letters, 27 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2023-11-06 22:43:25,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 146 flow [2023-11-06 22:43:25,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:43:25,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:43:25,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 826 transitions. [2023-11-06 22:43:25,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44053333333333333 [2023-11-06 22:43:25,847 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 826 transitions. [2023-11-06 22:43:25,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 826 transitions. [2023-11-06 22:43:25,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:25,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 826 transitions. [2023-11-06 22:43:25,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.3333333333333) internal successors, (826), 3 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:25,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:25,859 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:25,859 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 86 flow. Second operand 3 states and 826 transitions. [2023-11-06 22:43:25,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 146 flow [2023-11-06 22:43:25,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 31 transitions, 140 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-06 22:43:25,861 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 86 flow [2023-11-06 22:43:25,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-11-06 22:43:25,862 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2023-11-06 22:43:25,862 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 86 flow [2023-11-06 22:43:25,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 265.6666666666667) internal successors, (797), 3 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:25,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:25,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:43:25,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:26,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:26,074 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:26,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:26,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1166205, now seen corresponding path program 1 times [2023-11-06 22:43:26,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:26,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416384510] [2023-11-06 22:43:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:26,076 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 [2023-11-06 22:43:26,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:26,077 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:26,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:26,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:43:26,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:26,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:26,223 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:26,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416384510] [2023-11-06 22:43:26,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416384510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:26,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:26,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 22:43:26,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217832560] [2023-11-06 22:43:26,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:26,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:43:26,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:26,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:43:26,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:43:26,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 625 [2023-11-06 22:43:26,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 86 flow. Second operand has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:26,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:26,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 625 [2023-11-06 22:43:26,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:26,750 INFO L124 PetriNetUnfolderBase]: 218/369 cut-off events. [2023-11-06 22:43:26,750 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-06 22:43:26,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 762 conditions, 369 events. 218/369 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1268 event pairs, 168 based on Foata normal form. 2/152 useless extension candidates. Maximal degree in co-relation 722. Up to 364 conditions per place. [2023-11-06 22:43:26,753 INFO L140 encePairwiseOnDemand]: 619/625 looper letters, 30 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2023-11-06 22:43:26,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 172 flow [2023-11-06 22:43:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:43:26,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:43:26,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1361 transitions. [2023-11-06 22:43:26,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43552 [2023-11-06 22:43:26,760 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1361 transitions. [2023-11-06 22:43:26,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1361 transitions. [2023-11-06 22:43:26,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:26,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1361 transitions. [2023-11-06 22:43:26,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 272.2) internal successors, (1361), 5 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:26,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:26,778 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:26,778 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 86 flow. Second operand 5 states and 1361 transitions. [2023-11-06 22:43:26,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 172 flow [2023-11-06 22:43:26,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:43:26,780 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 124 flow [2023-11-06 22:43:26,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2023-11-06 22:43:26,781 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-11-06 22:43:26,781 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 124 flow [2023-11-06 22:43:26,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:26,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:26,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:43:26,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:27,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:27,001 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:27,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:27,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1166095, now seen corresponding path program 1 times [2023-11-06 22:43:27,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:27,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982069143] [2023-11-06 22:43:27,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:27,003 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 [2023-11-06 22:43:27,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:27,003 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:27,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:27,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:43:27,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:27,107 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:43:27,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:27,123 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:27,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:27,135 INFO L351 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:27,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:27,146 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:27,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:27,171 INFO L351 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 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:43:27,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:27,185 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:27,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:27,363 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:27,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982069143] [2023-11-06 22:43:27,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982069143] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:27,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:27,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 22:43:27,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400785727] [2023-11-06 22:43:27,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:27,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:43:27,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:27,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:43:27,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:43:28,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 625 [2023-11-06 22:43:28,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 124 flow. Second operand has 6 states, 6 states have (on average 262.0) internal successors, (1572), 6 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:28,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:28,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 625 [2023-11-06 22:43:28,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:28,934 INFO L124 PetriNetUnfolderBase]: 217/367 cut-off events. [2023-11-06 22:43:28,935 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:43:28,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 367 events. 217/367 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1260 event pairs, 168 based on Foata normal form. 2/153 useless extension candidates. Maximal degree in co-relation 737. Up to 365 conditions per place. [2023-11-06 22:43:28,938 INFO L140 encePairwiseOnDemand]: 622/625 looper letters, 29 selfloop transitions, 4 changer transitions 0/33 dead transitions. [2023-11-06 22:43:28,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 33 transitions, 184 flow [2023-11-06 22:43:28,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:43:28,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:43:28,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1340 transitions. [2023-11-06 22:43:28,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4288 [2023-11-06 22:43:28,946 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1340 transitions. [2023-11-06 22:43:28,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1340 transitions. [2023-11-06 22:43:28,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:28,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1340 transitions. [2023-11-06 22:43:28,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:28,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:28,963 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:28,964 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 124 flow. Second operand 5 states and 1340 transitions. [2023-11-06 22:43:28,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 33 transitions, 184 flow [2023-11-06 22:43:28,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 173 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-06 22:43:28,967 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 115 flow [2023-11-06 22:43:28,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-11-06 22:43:28,971 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-11-06 22:43:28,973 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 115 flow [2023-11-06 22:43:28,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 262.0) internal successors, (1572), 6 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:28,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:28,974 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2023-11-06 22:43:28,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:29,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:29,187 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:29,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:29,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1120754159, now seen corresponding path program 2 times [2023-11-06 22:43:29,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:29,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021800852] [2023-11-06 22:43:29,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:43:29,188 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 [2023-11-06 22:43:29,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:29,191 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:29,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:29,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:43:29,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:29,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:43:29,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:29,322 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:43:29,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:29,346 INFO L351 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 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:43:29,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:29,358 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:29,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:29,365 INFO L351 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:29,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:29,376 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:29,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:29,383 INFO L351 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:29,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:30,035 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:30,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021800852] [2023-11-06 22:43:30,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021800852] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:30,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:30,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:43:30,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228389013] [2023-11-06 22:43:30,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:30,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:43:30,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:30,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:43:30,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:43:32,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 625 [2023-11-06 22:43:32,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 115 flow. Second operand has 10 states, 10 states have (on average 259.0) internal successors, (2590), 10 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:32,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:32,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 625 [2023-11-06 22:43:32,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:33,331 INFO L124 PetriNetUnfolderBase]: 216/365 cut-off events. [2023-11-06 22:43:33,331 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-06 22:43:33,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 365 events. 216/365 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1263 event pairs, 168 based on Foata normal form. 2/151 useless extension candidates. Maximal degree in co-relation 737. Up to 362 conditions per place. [2023-11-06 22:43:33,334 INFO L140 encePairwiseOnDemand]: 619/625 looper letters, 24 selfloop transitions, 7 changer transitions 0/31 dead transitions. [2023-11-06 22:43:33,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 31 transitions, 164 flow [2023-11-06 22:43:33,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:43:33,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:43:33,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1581 transitions. [2023-11-06 22:43:33,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216 [2023-11-06 22:43:33,343 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1581 transitions. [2023-11-06 22:43:33,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1581 transitions. [2023-11-06 22:43:33,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:33,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1581 transitions. [2023-11-06 22:43:33,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 263.5) internal successors, (1581), 6 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:33,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 625.0) internal successors, (4375), 7 states have internal predecessors, (4375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:33,361 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 625.0) internal successors, (4375), 7 states have internal predecessors, (4375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:33,362 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 115 flow. Second operand 6 states and 1581 transitions. [2023-11-06 22:43:33,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 31 transitions, 164 flow [2023-11-06 22:43:33,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 31 transitions, 152 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-06 22:43:33,366 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 104 flow [2023-11-06 22:43:33,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=104, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-11-06 22:43:33,369 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2023-11-06 22:43:33,369 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 104 flow [2023-11-06 22:43:33,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 259.0) internal successors, (2590), 10 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:33,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:33,371 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2023-11-06 22:43:33,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:33,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:33,587 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:33,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:33,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1120754269, now seen corresponding path program 2 times [2023-11-06 22:43:33,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:33,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505304101] [2023-11-06 22:43:33,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:43:33,588 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 [2023-11-06 22:43:33,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:33,589 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:33,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:33,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:43:33,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:33,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:43:33,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:33,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:33,684 INFO L351 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 0 case distinctions, treesize of input 9 treesize of output 11 [2023-11-06 22:43:33,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:33,715 INFO L351 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 5 treesize of output 3 [2023-11-06 22:43:33,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:33,750 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-06 22:43:33,751 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 22:43:33,760 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2023-11-06 22:43:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:43:33,940 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:33,940 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:33,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505304101] [2023-11-06 22:43:33,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505304101] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:33,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:33,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:43:33,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289489239] [2023-11-06 22:43:33,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:33,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:43:33,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:33,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:43:33,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:43:34,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 625 [2023-11-06 22:43:34,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:34,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:34,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 625 [2023-11-06 22:43:34,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:34,408 INFO L124 PetriNetUnfolderBase]: 166/289 cut-off events. [2023-11-06 22:43:34,408 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:43:34,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 289 events. 166/289 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 948 event pairs, 128 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 572. Up to 289 conditions per place. [2023-11-06 22:43:34,411 INFO L140 encePairwiseOnDemand]: 622/625 looper letters, 28 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-11-06 22:43:34,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 29 transitions, 150 flow [2023-11-06 22:43:34,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:43:34,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:43:34,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 821 transitions. [2023-11-06 22:43:34,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4378666666666667 [2023-11-06 22:43:34,415 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 821 transitions. [2023-11-06 22:43:34,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 821 transitions. [2023-11-06 22:43:34,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:34,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 821 transitions. [2023-11-06 22:43:34,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.6666666666667) internal successors, (821), 3 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:34,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:34,424 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:34,424 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 104 flow. Second operand 3 states and 821 transitions. [2023-11-06 22:43:34,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 29 transitions, 150 flow [2023-11-06 22:43:34,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 120 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-11-06 22:43:34,426 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 64 flow [2023-11-06 22:43:34,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-11-06 22:43:34,427 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2023-11-06 22:43:34,427 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 64 flow [2023-11-06 22:43:34,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:34,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:34,428 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2023-11-06 22:43:34,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:34,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:34,639 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:34,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:34,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1120754271, now seen corresponding path program 1 times [2023-11-06 22:43:34,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:34,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686342366] [2023-11-06 22:43:34,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:34,640 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 [2023-11-06 22:43:34,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:34,641 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:34,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:34,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:43:34,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:34,785 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 22:43:34,787 INFO L351 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 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-06 22:43:34,814 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:43:34,815 INFO L351 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 19 treesize of output 22 [2023-11-06 22:43:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:43:34,942 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:34,942 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:34,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686342366] [2023-11-06 22:43:34,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686342366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:34,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:34,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:43:34,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244359714] [2023-11-06 22:43:34,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:34,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:43:34,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:34,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:43:34,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:43:35,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 625 [2023-11-06 22:43:35,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:35,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:35,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 625 [2023-11-06 22:43:35,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:35,310 INFO L124 PetriNetUnfolderBase]: 116/213 cut-off events. [2023-11-06 22:43:35,311 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:43:35,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 213 events. 116/213 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 645 event pairs, 88 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 430. Up to 213 conditions per place. [2023-11-06 22:43:35,313 INFO L140 encePairwiseOnDemand]: 622/625 looper letters, 26 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-06 22:43:35,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 27 transitions, 114 flow [2023-11-06 22:43:35,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:43:35,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:43:35,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 813 transitions. [2023-11-06 22:43:35,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336 [2023-11-06 22:43:35,317 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 813 transitions. [2023-11-06 22:43:35,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 813 transitions. [2023-11-06 22:43:35,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:35,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 813 transitions. [2023-11-06 22:43:35,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:35,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:35,326 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:35,326 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 64 flow. Second operand 3 states and 813 transitions. [2023-11-06 22:43:35,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 27 transitions, 114 flow [2023-11-06 22:43:35,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:43:35,328 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 61 flow [2023-11-06 22:43:35,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-11-06 22:43:35,330 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2023-11-06 22:43:35,330 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 61 flow [2023-11-06 22:43:35,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:35,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:35,331 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2023-11-06 22:43:35,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:35,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:35,543 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:35,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:35,543 INFO L85 PathProgramCache]: Analyzing trace with hash -991911717, now seen corresponding path program 1 times [2023-11-06 22:43:35,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:35,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683169957] [2023-11-06 22:43:35,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:35,544 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 [2023-11-06 22:43:35,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:35,545 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:35,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:35,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:43:35,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:35,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:35,686 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:43:35,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:35,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:35,708 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:35,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:35,717 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:43:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:43:35,760 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:35,760 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:35,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683169957] [2023-11-06 22:43:35,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683169957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:35,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:35,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:43:35,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273230801] [2023-11-06 22:43:35,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:35,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:43:35,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:35,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:43:35,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:43:35,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 625 [2023-11-06 22:43:35,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:35,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:35,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 625 [2023-11-06 22:43:35,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:36,066 INFO L124 PetriNetUnfolderBase]: 106/193 cut-off events. [2023-11-06 22:43:36,066 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:43:36,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 193 events. 106/193 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 560 event pairs, 80 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 390. Up to 193 conditions per place. [2023-11-06 22:43:36,068 INFO L140 encePairwiseOnDemand]: 622/625 looper letters, 24 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-11-06 22:43:36,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 107 flow [2023-11-06 22:43:36,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:43:36,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:43:36,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 820 transitions. [2023-11-06 22:43:36,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43733333333333335 [2023-11-06 22:43:36,073 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 820 transitions. [2023-11-06 22:43:36,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 820 transitions. [2023-11-06 22:43:36,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:36,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 820 transitions. [2023-11-06 22:43:36,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.3333333333333) internal successors, (820), 3 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:36,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:36,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:36,081 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 61 flow. Second operand 3 states and 820 transitions. [2023-11-06 22:43:36,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 107 flow [2023-11-06 22:43:36,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 106 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:43:36,083 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 58 flow [2023-11-06 22:43:36,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-11-06 22:43:36,084 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -6 predicate places. [2023-11-06 22:43:36,084 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 58 flow [2023-11-06 22:43:36,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:36,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:36,085 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2023-11-06 22:43:36,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:36,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:36,297 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:36,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:36,297 INFO L85 PathProgramCache]: Analyzing trace with hash -991911718, now seen corresponding path program 1 times [2023-11-06 22:43:36,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:36,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117307768] [2023-11-06 22:43:36,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:36,298 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 [2023-11-06 22:43:36,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:36,299 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:36,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:36,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:43:36,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:36,450 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:43:36,450 INFO L351 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 22:43:36,472 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:43:36,472 INFO L351 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 22:43:36,500 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:43:36,500 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 22:43:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:43:36,624 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:36,624 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:36,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117307768] [2023-11-06 22:43:36,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117307768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:36,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:36,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:43:36,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539162528] [2023-11-06 22:43:36,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:36,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:43:36,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:36,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:43:36,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:43:36,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 625 [2023-11-06 22:43:36,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 263.6666666666667) internal successors, (791), 3 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:36,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:36,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 625 [2023-11-06 22:43:36,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:36,950 INFO L124 PetriNetUnfolderBase]: 96/173 cut-off events. [2023-11-06 22:43:36,951 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:43:36,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 173 events. 96/173 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 479 event pairs, 72 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 350. Up to 173 conditions per place. [2023-11-06 22:43:36,953 INFO L140 encePairwiseOnDemand]: 622/625 looper letters, 22 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-11-06 22:43:36,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 100 flow [2023-11-06 22:43:36,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:43:36,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:43:36,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 809 transitions. [2023-11-06 22:43:36,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43146666666666667 [2023-11-06 22:43:36,957 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 809 transitions. [2023-11-06 22:43:36,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 809 transitions. [2023-11-06 22:43:36,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:36,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 809 transitions. [2023-11-06 22:43:36,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:36,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:36,974 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:36,974 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 58 flow. Second operand 3 states and 809 transitions. [2023-11-06 22:43:36,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 100 flow [2023-11-06 22:43:36,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 23 transitions, 99 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:43:36,977 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 55 flow [2023-11-06 22:43:36,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-11-06 22:43:36,978 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -7 predicate places. [2023-11-06 22:43:36,979 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 55 flow [2023-11-06 22:43:36,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 263.6666666666667) internal successors, (791), 3 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:36,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:36,979 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2023-11-06 22:43:36,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:37,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:37,190 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:37,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:37,191 INFO L85 PathProgramCache]: Analyzing trace with hash -684492402, now seen corresponding path program 1 times [2023-11-06 22:43:37,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:37,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293844451] [2023-11-06 22:43:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:37,191 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 [2023-11-06 22:43:37,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:37,193 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:37,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:37,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:43:37,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:37,325 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:43:37,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:37,331 INFO L351 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:37,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:37,344 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:37,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:37,361 INFO L351 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:37,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:37,377 INFO L351 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 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:43:37,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:37,385 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:43:37,420 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:37,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:37,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293844451] [2023-11-06 22:43:37,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293844451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:37,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:37,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:43:37,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899120262] [2023-11-06 22:43:37,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:37,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:43:37,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:37,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:43:37,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:43:37,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 625 [2023-11-06 22:43:37,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 55 flow. Second operand has 4 states, 4 states have (on average 260.5) internal successors, (1042), 4 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:37,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:37,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 625 [2023-11-06 22:43:37,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:37,750 INFO L124 PetriNetUnfolderBase]: 65/120 cut-off events. [2023-11-06 22:43:37,750 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:43:37,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 120 events. 65/120 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 276 event pairs, 45 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 243. Up to 116 conditions per place. [2023-11-06 22:43:37,752 INFO L140 encePairwiseOnDemand]: 621/625 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-11-06 22:43:37,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 21 transitions, 93 flow [2023-11-06 22:43:37,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:43:37,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:43:37,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1057 transitions. [2023-11-06 22:43:37,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228 [2023-11-06 22:43:37,756 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1057 transitions. [2023-11-06 22:43:37,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1057 transitions. [2023-11-06 22:43:37,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:37,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1057 transitions. [2023-11-06 22:43:37,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 264.25) internal successors, (1057), 4 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:37,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 625.0) internal successors, (3125), 5 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:37,766 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 625.0) internal successors, (3125), 5 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:37,766 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 55 flow. Second operand 4 states and 1057 transitions. [2023-11-06 22:43:37,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 21 transitions, 93 flow [2023-11-06 22:43:37,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 21 transitions, 92 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:43:37,768 INFO L231 Difference]: Finished difference. Result has 29 places, 21 transitions, 54 flow [2023-11-06 22:43:37,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2023-11-06 22:43:37,769 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -7 predicate places. [2023-11-06 22:43:37,769 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 54 flow [2023-11-06 22:43:37,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 260.5) internal successors, (1042), 4 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:37,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:37,770 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2023-11-06 22:43:37,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:37,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:37,986 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:37,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:37,987 INFO L85 PathProgramCache]: Analyzing trace with hash -684492401, now seen corresponding path program 1 times [2023-11-06 22:43:37,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:37,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021885290] [2023-11-06 22:43:37,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:37,987 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 [2023-11-06 22:43:37,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:37,988 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:38,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:38,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:43:38,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:38,133 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:43:38,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:38,143 INFO L351 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:38,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:38,149 INFO L351 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:38,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:38,158 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:38,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:38,168 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:38,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:38,185 INFO L351 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 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:43:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:43:38,259 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:38,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:38,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021885290] [2023-11-06 22:43:38,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021885290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:38,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:38,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:43:38,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280954528] [2023-11-06 22:43:38,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:38,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:43:38,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:38,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:43:38,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:43:38,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 625 [2023-11-06 22:43:38,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 54 flow. Second operand has 5 states, 5 states have (on average 260.2) internal successors, (1301), 5 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:38,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:38,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 625 [2023-11-06 22:43:38,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:38,768 INFO L124 PetriNetUnfolderBase]: 101/186 cut-off events. [2023-11-06 22:43:38,768 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:43:38,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 186 events. 101/186 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 582 event pairs, 45 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 378. Up to 116 conditions per place. [2023-11-06 22:43:38,770 INFO L140 encePairwiseOnDemand]: 620/625 looper letters, 30 selfloop transitions, 4 changer transitions 0/34 dead transitions. [2023-11-06 22:43:38,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 34 transitions, 151 flow [2023-11-06 22:43:38,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:43:38,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:43:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1328 transitions. [2023-11-06 22:43:38,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42496 [2023-11-06 22:43:38,776 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1328 transitions. [2023-11-06 22:43:38,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1328 transitions. [2023-11-06 22:43:38,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:38,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1328 transitions. [2023-11-06 22:43:38,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 265.6) internal successors, (1328), 5 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:38,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:38,806 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:38,806 INFO L175 Difference]: Start difference. First operand has 29 places, 21 transitions, 54 flow. Second operand 5 states and 1328 transitions. [2023-11-06 22:43:38,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 34 transitions, 151 flow [2023-11-06 22:43:38,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 148 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:43:38,807 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 67 flow [2023-11-06 22:43:38,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=67, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2023-11-06 22:43:38,808 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2023-11-06 22:43:38,808 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 67 flow [2023-11-06 22:43:38,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 260.2) internal successors, (1301), 5 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:38,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:38,809 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:38,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:39,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:39,020 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:39,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:39,021 INFO L85 PathProgramCache]: Analyzing trace with hash 255573198, now seen corresponding path program 1 times [2023-11-06 22:43:39,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:39,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544643382] [2023-11-06 22:43:39,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:39,022 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 [2023-11-06 22:43:39,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:39,023 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:39,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:39,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:43:39,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:39,177 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:43:39,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:39,185 INFO L351 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:39,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:39,194 INFO L351 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:39,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:39,204 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:39,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:39,217 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:39,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:39,236 INFO L351 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 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:43:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:43:39,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:43:39,664 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:39,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544643382] [2023-11-06 22:43:39,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544643382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:39,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:39,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:43:39,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540667685] [2023-11-06 22:43:39,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:39,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:43:39,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:39,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:43:39,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:43:41,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 625 [2023-11-06 22:43:41,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 67 flow. Second operand has 10 states, 10 states have (on average 259.4) internal successors, (2594), 10 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:41,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:41,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 625 [2023-11-06 22:43:41,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:42,471 INFO L124 PetriNetUnfolderBase]: 173/318 cut-off events. [2023-11-06 22:43:42,472 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-11-06 22:43:42,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 318 events. 173/318 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1173 event pairs, 45 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 717. Up to 116 conditions per place. [2023-11-06 22:43:42,475 INFO L140 encePairwiseOnDemand]: 620/625 looper letters, 54 selfloop transitions, 6 changer transitions 0/60 dead transitions. [2023-11-06 22:43:42,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 60 transitions, 276 flow [2023-11-06 22:43:42,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:43:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:43:42,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1866 transitions. [2023-11-06 22:43:42,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42651428571428573 [2023-11-06 22:43:42,482 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1866 transitions. [2023-11-06 22:43:42,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1866 transitions. [2023-11-06 22:43:42,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:42,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1866 transitions. [2023-11-06 22:43:42,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 266.57142857142856) internal successors, (1866), 7 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:42,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 625.0) internal successors, (5000), 8 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:42,497 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 625.0) internal successors, (5000), 8 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:42,497 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 67 flow. Second operand 7 states and 1866 transitions. [2023-11-06 22:43:42,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 60 transitions, 276 flow [2023-11-06 22:43:42,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 60 transitions, 270 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:43:42,499 INFO L231 Difference]: Finished difference. Result has 37 places, 24 transitions, 91 flow [2023-11-06 22:43:42,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=91, PETRI_PLACES=37, PETRI_TRANSITIONS=24} [2023-11-06 22:43:42,500 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2023-11-06 22:43:42,500 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 24 transitions, 91 flow [2023-11-06 22:43:42,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 259.4) internal successors, (2594), 10 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:42,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:42,502 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:42,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:42,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:42,713 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:42,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:42,714 INFO L85 PathProgramCache]: Analyzing trace with hash -666211664, now seen corresponding path program 1 times [2023-11-06 22:43:42,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:42,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608838056] [2023-11-06 22:43:42,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:42,715 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 [2023-11-06 22:43:42,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:42,716 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:42,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:42,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:43:42,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:42,877 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:43:42,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:42,894 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:42,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:42,900 INFO L351 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:42,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:42,907 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:42,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:42,916 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:42,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:42,922 INFO L351 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:43,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:43:43,003 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:43,003 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:43,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608838056] [2023-11-06 22:43:43,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608838056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:43,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:43,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:43:43,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680449116] [2023-11-06 22:43:43,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:43,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:43:43,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:43,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:43:43,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:43:43,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 625 [2023-11-06 22:43:43,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 24 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 260.6) internal successors, (1303), 5 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:43,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:43,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 625 [2023-11-06 22:43:43,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:43,648 INFO L124 PetriNetUnfolderBase]: 249/458 cut-off events. [2023-11-06 22:43:43,648 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2023-11-06 22:43:43,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 458 events. 249/458 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1885 event pairs, 135 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 1137. Up to 314 conditions per place. [2023-11-06 22:43:43,652 INFO L140 encePairwiseOnDemand]: 620/625 looper letters, 34 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2023-11-06 22:43:43,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 227 flow [2023-11-06 22:43:43,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:43:43,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:43:43,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1326 transitions. [2023-11-06 22:43:43,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42432 [2023-11-06 22:43:43,658 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1326 transitions. [2023-11-06 22:43:43,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1326 transitions. [2023-11-06 22:43:43,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:43,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1326 transitions. [2023-11-06 22:43:43,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 265.2) internal successors, (1326), 5 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:43,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:43,669 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:43,669 INFO L175 Difference]: Start difference. First operand has 37 places, 24 transitions, 91 flow. Second operand 5 states and 1326 transitions. [2023-11-06 22:43:43,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 227 flow [2023-11-06 22:43:43,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 212 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-06 22:43:43,672 INFO L231 Difference]: Finished difference. Result has 39 places, 25 transitions, 98 flow [2023-11-06 22:43:43,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=39, PETRI_TRANSITIONS=25} [2023-11-06 22:43:43,673 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-11-06 22:43:43,673 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 25 transitions, 98 flow [2023-11-06 22:43:43,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 260.6) internal successors, (1303), 5 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:43,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:43,674 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:43,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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)] Ended with exit code 0 [2023-11-06 22:43:43,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:43,886 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:43,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:43,886 INFO L85 PathProgramCache]: Analyzing trace with hash 822277234, now seen corresponding path program 1 times [2023-11-06 22:43:43,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:43,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219304444] [2023-11-06 22:43:43,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:43,887 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 [2023-11-06 22:43:43,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:43,888 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:43,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:44,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:43:44,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:44,075 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:43:44,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:44,095 INFO L351 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 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:43:44,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:44,103 INFO L351 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:44,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:44,115 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:44,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:44,120 INFO L351 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:44,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:44,127 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:43:44,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:44,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:43:44,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:44,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219304444] [2023-11-06 22:43:44,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219304444] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:44,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:44,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:43:44,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141201885] [2023-11-06 22:43:44,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:44,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:43:44,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:44,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:43:44,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:43:46,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 625 [2023-11-06 22:43:46,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 25 transitions, 98 flow. Second operand has 10 states, 10 states have (on average 259.8) internal successors, (2598), 10 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:46,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:46,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 625 [2023-11-06 22:43:46,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:47,523 INFO L124 PetriNetUnfolderBase]: 401/738 cut-off events. [2023-11-06 22:43:47,523 INFO L125 PetriNetUnfolderBase]: For 479/479 co-relation queries the response was YES. [2023-11-06 22:43:47,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1962 conditions, 738 events. 401/738 cut-off events. For 479/479 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3487 event pairs, 135 based on Foata normal form. 0/710 useless extension candidates. Maximal degree in co-relation 1948. Up to 314 conditions per place. [2023-11-06 22:43:47,530 INFO L140 encePairwiseOnDemand]: 620/625 looper letters, 60 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2023-11-06 22:43:47,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 66 transitions, 394 flow [2023-11-06 22:43:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:43:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:43:47,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1860 transitions. [2023-11-06 22:43:47,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42514285714285716 [2023-11-06 22:43:47,535 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1860 transitions. [2023-11-06 22:43:47,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1860 transitions. [2023-11-06 22:43:47,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:47,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1860 transitions. [2023-11-06 22:43:47,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 265.7142857142857) internal successors, (1860), 7 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:47,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 625.0) internal successors, (5000), 8 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:47,550 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 625.0) internal successors, (5000), 8 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:47,551 INFO L175 Difference]: Start difference. First operand has 39 places, 25 transitions, 98 flow. Second operand 7 states and 1860 transitions. [2023-11-06 22:43:47,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 66 transitions, 394 flow [2023-11-06 22:43:47,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 66 transitions, 388 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:43:47,554 INFO L231 Difference]: Finished difference. Result has 44 places, 27 transitions, 122 flow [2023-11-06 22:43:47,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=122, PETRI_PLACES=44, PETRI_TRANSITIONS=27} [2023-11-06 22:43:47,555 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 8 predicate places. [2023-11-06 22:43:47,555 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 27 transitions, 122 flow [2023-11-06 22:43:47,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 259.8) internal successors, (2598), 10 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:47,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:47,558 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2023-11-06 22:43:47,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:47,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:47,771 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:47,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:47,771 INFO L85 PathProgramCache]: Analyzing trace with hash 792744174, now seen corresponding path program 2 times [2023-11-06 22:43:47,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:47,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242876238] [2023-11-06 22:43:47,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:43:47,772 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 [2023-11-06 22:43:47,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:47,773 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:47,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:43:47,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:43:47,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:47,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:43:47,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:43:47,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:43:48,021 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:48,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242876238] [2023-11-06 22:43:48,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242876238] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:48,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:48,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-06 22:43:48,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965385136] [2023-11-06 22:43:48,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:48,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:43:48,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:48,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:43:48,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:43:48,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 625 [2023-11-06 22:43:48,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 27 transitions, 122 flow. Second operand has 10 states, 10 states have (on average 269.4) internal successors, (2694), 10 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:48,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:48,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 625 [2023-11-06 22:43:48,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:49,009 INFO L124 PetriNetUnfolderBase]: 347/662 cut-off events. [2023-11-06 22:43:49,009 INFO L125 PetriNetUnfolderBase]: For 744/744 co-relation queries the response was YES. [2023-11-06 22:43:49,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1895 conditions, 662 events. 347/662 cut-off events. For 744/744 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3247 event pairs, 9 based on Foata normal form. 44/706 useless extension candidates. Maximal degree in co-relation 1879. Up to 156 conditions per place. [2023-11-06 22:43:49,015 INFO L140 encePairwiseOnDemand]: 622/625 looper letters, 76 selfloop transitions, 4 changer transitions 0/80 dead transitions. [2023-11-06 22:43:49,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 80 transitions, 508 flow [2023-11-06 22:43:49,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:43:49,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:43:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1673 transitions. [2023-11-06 22:43:49,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461333333333333 [2023-11-06 22:43:49,022 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1673 transitions. [2023-11-06 22:43:49,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1673 transitions. [2023-11-06 22:43:49,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:49,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1673 transitions. [2023-11-06 22:43:49,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 278.8333333333333) internal successors, (1673), 6 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:49,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 625.0) internal successors, (4375), 7 states have internal predecessors, (4375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:49,034 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 625.0) internal successors, (4375), 7 states have internal predecessors, (4375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:49,034 INFO L175 Difference]: Start difference. First operand has 44 places, 27 transitions, 122 flow. Second operand 6 states and 1673 transitions. [2023-11-06 22:43:49,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 80 transitions, 508 flow [2023-11-06 22:43:49,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 80 transitions, 466 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-11-06 22:43:49,039 INFO L231 Difference]: Finished difference. Result has 41 places, 25 transitions, 98 flow [2023-11-06 22:43:49,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=25} [2023-11-06 22:43:49,040 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-11-06 22:43:49,040 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 25 transitions, 98 flow [2023-11-06 22:43:49,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 269.4) internal successors, (2694), 10 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:49,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:49,041 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:49,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:49,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:49,254 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:49,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:49,254 INFO L85 PathProgramCache]: Analyzing trace with hash -65485774, now seen corresponding path program 2 times [2023-11-06 22:43:49,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:49,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393192089] [2023-11-06 22:43:49,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:43:49,255 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 [2023-11-06 22:43:49,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:49,255 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:49,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-06 22:43:49,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:43:49,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:49,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:43:49,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:49,467 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:43:49,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:49,476 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:49,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:49,488 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:49,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:49,506 INFO L351 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 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:43:49,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:49,516 INFO L351 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:49,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:49,522 INFO L351 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:43:49,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:43:50,087 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:50,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393192089] [2023-11-06 22:43:50,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393192089] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:50,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:50,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2023-11-06 22:43:50,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538760608] [2023-11-06 22:43:50,088 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:50,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:43:50,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:50,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:43:50,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:43:52,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 625 [2023-11-06 22:43:52,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 25 transitions, 98 flow. Second operand has 12 states, 12 states have (on average 259.8333333333333) internal successors, (3118), 12 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:52,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:52,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 625 [2023-11-06 22:43:52,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:53,664 INFO L124 PetriNetUnfolderBase]: 288/577 cut-off events. [2023-11-06 22:43:53,664 INFO L125 PetriNetUnfolderBase]: For 307/307 co-relation queries the response was YES. [2023-11-06 22:43:53,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1498 conditions, 577 events. 288/577 cut-off events. For 307/307 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2732 event pairs, 24 based on Foata normal form. 52/629 useless extension candidates. Maximal degree in co-relation 1486. Up to 126 conditions per place. [2023-11-06 22:43:53,669 INFO L140 encePairwiseOnDemand]: 620/625 looper letters, 58 selfloop transitions, 6 changer transitions 0/64 dead transitions. [2023-11-06 22:43:53,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 64 transitions, 357 flow [2023-11-06 22:43:53,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:43:53,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:43:53,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2118 transitions. [2023-11-06 22:43:53,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236 [2023-11-06 22:43:53,677 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2118 transitions. [2023-11-06 22:43:53,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2118 transitions. [2023-11-06 22:43:53,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:53,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2118 transitions. [2023-11-06 22:43:53,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 264.75) internal successors, (2118), 8 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:53,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 625.0) internal successors, (5625), 9 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:53,692 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 625.0) internal successors, (5625), 9 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:53,692 INFO L175 Difference]: Start difference. First operand has 41 places, 25 transitions, 98 flow. Second operand 8 states and 2118 transitions. [2023-11-06 22:43:53,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 64 transitions, 357 flow [2023-11-06 22:43:53,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 64 transitions, 313 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-06 22:43:53,695 INFO L231 Difference]: Finished difference. Result has 39 places, 23 transitions, 80 flow [2023-11-06 22:43:53,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=80, PETRI_PLACES=39, PETRI_TRANSITIONS=23} [2023-11-06 22:43:53,696 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-11-06 22:43:53,696 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 23 transitions, 80 flow [2023-11-06 22:43:53,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 259.8333333333333) internal successors, (3118), 12 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:53,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:53,698 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:53,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:53,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:53,911 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:53,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:53,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1735331351, now seen corresponding path program 1 times [2023-11-06 22:43:53,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:53,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629641821] [2023-11-06 22:43:53,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:53,913 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 [2023-11-06 22:43:53,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:53,914 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:53,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-06 22:43:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:54,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:43:54,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:43:54,320 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:54,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:54,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629641821] [2023-11-06 22:43:54,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629641821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:54,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:54,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:43:54,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151891343] [2023-11-06 22:43:54,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:54,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:43:54,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:54,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:43:54,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:43:54,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 625 [2023-11-06 22:43:54,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 23 transitions, 80 flow. Second operand has 6 states, 6 states have (on average 248.5) internal successors, (1491), 6 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:54,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:54,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 625 [2023-11-06 22:43:54,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:55,230 INFO L124 PetriNetUnfolderBase]: 290/588 cut-off events. [2023-11-06 22:43:55,230 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2023-11-06 22:43:55,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1458 conditions, 588 events. 290/588 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2846 event pairs, 218 based on Foata normal form. 5/593 useless extension candidates. Maximal degree in co-relation 1448. Up to 442 conditions per place. [2023-11-06 22:43:55,235 INFO L140 encePairwiseOnDemand]: 619/625 looper letters, 38 selfloop transitions, 3 changer transitions 8/49 dead transitions. [2023-11-06 22:43:55,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 264 flow [2023-11-06 22:43:55,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:43:55,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:43:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1272 transitions. [2023-11-06 22:43:55,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40704 [2023-11-06 22:43:55,239 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1272 transitions. [2023-11-06 22:43:55,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1272 transitions. [2023-11-06 22:43:55,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:55,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1272 transitions. [2023-11-06 22:43:55,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 254.4) internal successors, (1272), 5 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:55,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:55,247 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:55,247 INFO L175 Difference]: Start difference. First operand has 39 places, 23 transitions, 80 flow. Second operand 5 states and 1272 transitions. [2023-11-06 22:43:55,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 264 flow [2023-11-06 22:43:55,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 49 transitions, 239 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 22:43:55,249 INFO L231 Difference]: Finished difference. Result has 40 places, 24 transitions, 89 flow [2023-11-06 22:43:55,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=89, PETRI_PLACES=40, PETRI_TRANSITIONS=24} [2023-11-06 22:43:55,250 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2023-11-06 22:43:55,250 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 24 transitions, 89 flow [2023-11-06 22:43:55,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 248.5) internal successors, (1491), 6 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:55,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:55,251 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:55,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-11-06 22:43:55,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:55,463 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:55,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:55,463 INFO L85 PathProgramCache]: Analyzing trace with hash -575315587, now seen corresponding path program 2 times [2023-11-06 22:43:55,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:55,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [240037384] [2023-11-06 22:43:55,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:43:55,464 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 [2023-11-06 22:43:55,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:55,465 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:55,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-06 22:43:55,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:43:55,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:55,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:43:55,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:43:55,738 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:55,738 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:55,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [240037384] [2023-11-06 22:43:55,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [240037384] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:55,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:55,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:43:55,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140410006] [2023-11-06 22:43:55,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:55,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:43:55,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:55,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:43:55,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:43:55,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 625 [2023-11-06 22:43:55,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 24 transitions, 89 flow. Second operand has 6 states, 6 states have (on average 248.5) internal successors, (1491), 6 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:55,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:55,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 625 [2023-11-06 22:43:55,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:56,434 INFO L124 PetriNetUnfolderBase]: 284/580 cut-off events. [2023-11-06 22:43:56,434 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2023-11-06 22:43:56,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1589 conditions, 580 events. 284/580 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2744 event pairs, 218 based on Foata normal form. 3/583 useless extension candidates. Maximal degree in co-relation 1577. Up to 452 conditions per place. [2023-11-06 22:43:56,439 INFO L140 encePairwiseOnDemand]: 619/625 looper letters, 41 selfloop transitions, 3 changer transitions 6/50 dead transitions. [2023-11-06 22:43:56,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 290 flow [2023-11-06 22:43:56,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:43:56,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:43:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1270 transitions. [2023-11-06 22:43:56,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064 [2023-11-06 22:43:56,444 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1270 transitions. [2023-11-06 22:43:56,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1270 transitions. [2023-11-06 22:43:56,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:56,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1270 transitions. [2023-11-06 22:43:56,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:56,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:56,452 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:56,452 INFO L175 Difference]: Start difference. First operand has 40 places, 24 transitions, 89 flow. Second operand 5 states and 1270 transitions. [2023-11-06 22:43:56,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 290 flow [2023-11-06 22:43:56,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 266 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-06 22:43:56,455 INFO L231 Difference]: Finished difference. Result has 43 places, 25 transitions, 99 flow [2023-11-06 22:43:56,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=43, PETRI_TRANSITIONS=25} [2023-11-06 22:43:56,455 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 7 predicate places. [2023-11-06 22:43:56,455 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 25 transitions, 99 flow [2023-11-06 22:43:56,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 248.5) internal successors, (1491), 6 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:56,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:56,456 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:56,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:56,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:56,668 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:56,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:56,668 INFO L85 PathProgramCache]: Analyzing trace with hash 493920247, now seen corresponding path program 3 times [2023-11-06 22:43:56,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:56,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510866141] [2023-11-06 22:43:56,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:43:56,669 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 [2023-11-06 22:43:56,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:56,670 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:56,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-06 22:43:56,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 22:43:56,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:56,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:43:56,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:43:57,140 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:57,140 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:57,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510866141] [2023-11-06 22:43:57,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510866141] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:57,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:57,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:43:57,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371332573] [2023-11-06 22:43:57,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:57,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:43:57,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:57,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:43:57,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:43:57,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 625 [2023-11-06 22:43:57,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 25 transitions, 99 flow. Second operand has 6 states, 6 states have (on average 247.5) internal successors, (1485), 6 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:57,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:57,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 625 [2023-11-06 22:43:57,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:57,940 INFO L124 PetriNetUnfolderBase]: 294/596 cut-off events. [2023-11-06 22:43:57,940 INFO L125 PetriNetUnfolderBase]: For 484/484 co-relation queries the response was YES. [2023-11-06 22:43:57,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1807 conditions, 596 events. 294/596 cut-off events. For 484/484 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2870 event pairs, 220 based on Foata normal form. 5/601 useless extension candidates. Maximal degree in co-relation 1793. Up to 446 conditions per place. [2023-11-06 22:43:57,946 INFO L140 encePairwiseOnDemand]: 619/625 looper letters, 37 selfloop transitions, 5 changer transitions 6/48 dead transitions. [2023-11-06 22:43:57,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 48 transitions, 289 flow [2023-11-06 22:43:57,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:43:57,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:43:57,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1266 transitions. [2023-11-06 22:43:57,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40512 [2023-11-06 22:43:57,951 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1266 transitions. [2023-11-06 22:43:57,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1266 transitions. [2023-11-06 22:43:57,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:57,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1266 transitions. [2023-11-06 22:43:57,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 253.2) internal successors, (1266), 5 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:57,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:57,960 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:57,960 INFO L175 Difference]: Start difference. First operand has 43 places, 25 transitions, 99 flow. Second operand 5 states and 1266 transitions. [2023-11-06 22:43:57,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 48 transitions, 289 flow [2023-11-06 22:43:57,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 48 transitions, 265 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-06 22:43:57,963 INFO L231 Difference]: Finished difference. Result has 46 places, 28 transitions, 128 flow [2023-11-06 22:43:57,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=46, PETRI_TRANSITIONS=28} [2023-11-06 22:43:57,964 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 10 predicate places. [2023-11-06 22:43:57,964 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 28 transitions, 128 flow [2023-11-06 22:43:57,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 247.5) internal successors, (1485), 6 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:57,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:57,965 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:57,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:58,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:58,178 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:43:58,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:58,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1130188639, now seen corresponding path program 4 times [2023-11-06 22:43:58,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:58,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338027605] [2023-11-06 22:43:58,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:43:58,179 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 [2023-11-06 22:43:58,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:58,180 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:43:58,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-06 22:43:58,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:43:58,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:58,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:43:58,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:43:59,171 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:59,171 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:59,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338027605] [2023-11-06 22:43:59,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338027605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:59,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:59,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:43:59,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290340153] [2023-11-06 22:43:59,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:59,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:43:59,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:59,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:43:59,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:44:00,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 625 [2023-11-06 22:44:00,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 28 transitions, 128 flow. Second operand has 6 states, 6 states have (on average 247.5) internal successors, (1485), 6 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:00,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:00,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 625 [2023-11-06 22:44:00,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:01,336 INFO L124 PetriNetUnfolderBase]: 286/578 cut-off events. [2023-11-06 22:44:01,336 INFO L125 PetriNetUnfolderBase]: For 619/619 co-relation queries the response was YES. [2023-11-06 22:44:01,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1814 conditions, 578 events. 286/578 cut-off events. For 619/619 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2725 event pairs, 216 based on Foata normal form. 3/581 useless extension candidates. Maximal degree in co-relation 1798. Up to 454 conditions per place. [2023-11-06 22:44:01,342 INFO L140 encePairwiseOnDemand]: 618/625 looper letters, 36 selfloop transitions, 9 changer transitions 7/52 dead transitions. [2023-11-06 22:44:01,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 52 transitions, 334 flow [2023-11-06 22:44:01,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:44:01,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:44:01,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1514 transitions. [2023-11-06 22:44:01,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40373333333333333 [2023-11-06 22:44:01,348 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1514 transitions. [2023-11-06 22:44:01,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1514 transitions. [2023-11-06 22:44:01,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:01,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1514 transitions. [2023-11-06 22:44:01,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 252.33333333333334) internal successors, (1514), 6 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:01,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 625.0) internal successors, (4375), 7 states have internal predecessors, (4375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:01,359 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 625.0) internal successors, (4375), 7 states have internal predecessors, (4375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:01,359 INFO L175 Difference]: Start difference. First operand has 46 places, 28 transitions, 128 flow. Second operand 6 states and 1514 transitions. [2023-11-06 22:44:01,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 52 transitions, 334 flow [2023-11-06 22:44:01,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 52 transitions, 317 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-06 22:44:01,362 INFO L231 Difference]: Finished difference. Result has 52 places, 33 transitions, 194 flow [2023-11-06 22:44:01,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=194, PETRI_PLACES=52, PETRI_TRANSITIONS=33} [2023-11-06 22:44:01,363 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 16 predicate places. [2023-11-06 22:44:01,363 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 33 transitions, 194 flow [2023-11-06 22:44:01,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 247.5) internal successors, (1485), 6 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:01,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:01,364 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:01,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-11-06 22:44:01,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:01,576 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:44:01,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:01,577 INFO L85 PathProgramCache]: Analyzing trace with hash 336369055, now seen corresponding path program 1 times [2023-11-06 22:44:01,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:44:01,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316263689] [2023-11-06 22:44:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:01,577 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 [2023-11-06 22:44:01,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:44:01,579 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:44:01,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-06 22:44:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:01,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:44:01,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:44:01,802 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:44:01,803 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:44:01,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316263689] [2023-11-06 22:44:01,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316263689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:44:01,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:44:01,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:44:01,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672122482] [2023-11-06 22:44:01,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:44:01,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:44:01,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:44:01,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:44:01,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:44:02,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 625 [2023-11-06 22:44:02,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 33 transitions, 194 flow. Second operand has 5 states, 5 states have (on average 259.2) internal successors, (1296), 5 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:02,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:02,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 625 [2023-11-06 22:44:02,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:02,433 INFO L124 PetriNetUnfolderBase]: 296/593 cut-off events. [2023-11-06 22:44:02,433 INFO L125 PetriNetUnfolderBase]: For 888/888 co-relation queries the response was YES. [2023-11-06 22:44:02,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2017 conditions, 593 events. 296/593 cut-off events. For 888/888 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2816 event pairs, 44 based on Foata normal form. 12/605 useless extension candidates. Maximal degree in co-relation 1998. Up to 380 conditions per place. [2023-11-06 22:44:02,440 INFO L140 encePairwiseOnDemand]: 620/625 looper letters, 46 selfloop transitions, 8 changer transitions 1/55 dead transitions. [2023-11-06 22:44:02,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 401 flow [2023-11-06 22:44:02,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:44:02,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:44:02,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1318 transitions. [2023-11-06 22:44:02,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42176 [2023-11-06 22:44:02,445 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1318 transitions. [2023-11-06 22:44:02,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1318 transitions. [2023-11-06 22:44:02,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:02,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1318 transitions. [2023-11-06 22:44:02,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 263.6) internal successors, (1318), 5 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:02,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:02,456 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:02,456 INFO L175 Difference]: Start difference. First operand has 52 places, 33 transitions, 194 flow. Second operand 5 states and 1318 transitions. [2023-11-06 22:44:02,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 401 flow [2023-11-06 22:44:02,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 55 transitions, 375 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-11-06 22:44:02,462 INFO L231 Difference]: Finished difference. Result has 55 places, 35 transitions, 221 flow [2023-11-06 22:44:02,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=55, PETRI_TRANSITIONS=35} [2023-11-06 22:44:02,465 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 19 predicate places. [2023-11-06 22:44:02,465 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 35 transitions, 221 flow [2023-11-06 22:44:02,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 259.2) internal successors, (1296), 5 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:02,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:02,467 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:02,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:44:02,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:02,681 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:44:02,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:02,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1303168202, now seen corresponding path program 1 times [2023-11-06 22:44:02,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:44:02,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386425628] [2023-11-06 22:44:02,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:02,682 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 [2023-11-06 22:44:02,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:44:02,684 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:44:02,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-11-06 22:44:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:02,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:44:02,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:44:02,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:44:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:44:03,090 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:44:03,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386425628] [2023-11-06 22:44:03,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386425628] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:44:03,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:44:03,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-06 22:44:03,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318105189] [2023-11-06 22:44:03,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:44:03,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:44:03,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:44:03,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:44:03,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:44:03,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 625 [2023-11-06 22:44:03,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 35 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:03,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:03,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 625 [2023-11-06 22:44:03,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:04,077 INFO L124 PetriNetUnfolderBase]: 318/633 cut-off events. [2023-11-06 22:44:04,077 INFO L125 PetriNetUnfolderBase]: For 1276/1276 co-relation queries the response was YES. [2023-11-06 22:44:04,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2219 conditions, 633 events. 318/633 cut-off events. For 1276/1276 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3203 event pairs, 28 based on Foata normal form. 18/651 useless extension candidates. Maximal degree in co-relation 2199. Up to 422 conditions per place. [2023-11-06 22:44:04,084 INFO L140 encePairwiseOnDemand]: 620/625 looper letters, 52 selfloop transitions, 9 changer transitions 1/62 dead transitions. [2023-11-06 22:44:04,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 462 flow [2023-11-06 22:44:04,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:44:04,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:44:04,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1317 transitions. [2023-11-06 22:44:04,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42144 [2023-11-06 22:44:04,088 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1317 transitions. [2023-11-06 22:44:04,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1317 transitions. [2023-11-06 22:44:04,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:04,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1317 transitions. [2023-11-06 22:44:04,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 263.4) internal successors, (1317), 5 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:04,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:04,094 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:04,095 INFO L175 Difference]: Start difference. First operand has 55 places, 35 transitions, 221 flow. Second operand 5 states and 1317 transitions. [2023-11-06 22:44:04,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 462 flow [2023-11-06 22:44:04,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 62 transitions, 446 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-06 22:44:04,100 INFO L231 Difference]: Finished difference. Result has 59 places, 37 transitions, 258 flow [2023-11-06 22:44:04,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=59, PETRI_TRANSITIONS=37} [2023-11-06 22:44:04,101 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2023-11-06 22:44:04,101 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 37 transitions, 258 flow [2023-11-06 22:44:04,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:04,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:04,101 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:04,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:44:04,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:04,314 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:44:04,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:04,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1044553969, now seen corresponding path program 2 times [2023-11-06 22:44:04,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:44:04,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075999801] [2023-11-06 22:44:04,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:44:04,315 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 [2023-11-06 22:44:04,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:44:04,316 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:44:04,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-11-06 22:44:04,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:44:04,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:44:04,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:44:04,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:44:04,623 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:44:04,623 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:44:04,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075999801] [2023-11-06 22:44:04,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075999801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:44:04,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:44:04,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:44:04,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552305489] [2023-11-06 22:44:04,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:44:04,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:44:04,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:44:04,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:44:04,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:44:04,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 625 [2023-11-06 22:44:04,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 37 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 256.2) internal successors, (1281), 5 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:04,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:04,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 625 [2023-11-06 22:44:04,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:05,233 INFO L124 PetriNetUnfolderBase]: 334/661 cut-off events. [2023-11-06 22:44:05,233 INFO L125 PetriNetUnfolderBase]: For 2033/2033 co-relation queries the response was YES. [2023-11-06 22:44:05,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2469 conditions, 661 events. 334/661 cut-off events. For 2033/2033 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3141 event pairs, 228 based on Foata normal form. 12/673 useless extension candidates. Maximal degree in co-relation 2447. Up to 508 conditions per place. [2023-11-06 22:44:05,240 INFO L140 encePairwiseOnDemand]: 620/625 looper letters, 44 selfloop transitions, 10 changer transitions 0/54 dead transitions. [2023-11-06 22:44:05,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 54 transitions, 435 flow [2023-11-06 22:44:05,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:44:05,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:44:05,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1303 transitions. [2023-11-06 22:44:05,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41696 [2023-11-06 22:44:05,244 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1303 transitions. [2023-11-06 22:44:05,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1303 transitions. [2023-11-06 22:44:05,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:05,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1303 transitions. [2023-11-06 22:44:05,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 260.6) internal successors, (1303), 5 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:05,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:05,251 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:05,252 INFO L175 Difference]: Start difference. First operand has 59 places, 37 transitions, 258 flow. Second operand 5 states and 1303 transitions. [2023-11-06 22:44:05,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 54 transitions, 435 flow [2023-11-06 22:44:05,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 54 transitions, 420 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-06 22:44:05,257 INFO L231 Difference]: Finished difference. Result has 62 places, 38 transitions, 279 flow [2023-11-06 22:44:05,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=279, PETRI_PLACES=62, PETRI_TRANSITIONS=38} [2023-11-06 22:44:05,258 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2023-11-06 22:44:05,258 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 38 transitions, 279 flow [2023-11-06 22:44:05,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 256.2) internal successors, (1281), 5 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:05,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:05,259 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:05,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2023-11-06 22:44:05,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:05,471 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:44:05,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:05,472 INFO L85 PathProgramCache]: Analyzing trace with hash -974859664, now seen corresponding path program 2 times [2023-11-06 22:44:05,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:44:05,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022887334] [2023-11-06 22:44:05,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:44:05,473 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:05,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:44:05,474 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:44:05,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-11-06 22:44:05,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:44:05,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:44:05,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:44:05,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:44:05,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:44:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:44:06,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:44:06,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022887334] [2023-11-06 22:44:06,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022887334] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:44:06,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:44:06,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-06 22:44:06,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552730981] [2023-11-06 22:44:06,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:44:06,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:44:06,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:44:06,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:44:06,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:44:06,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 625 [2023-11-06 22:44:06,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 38 transitions, 279 flow. Second operand has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:06,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:06,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 625 [2023-11-06 22:44:06,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:07,197 INFO L124 PetriNetUnfolderBase]: 374/755 cut-off events. [2023-11-06 22:44:07,197 INFO L125 PetriNetUnfolderBase]: For 2268/2268 co-relation queries the response was YES. [2023-11-06 22:44:07,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2876 conditions, 755 events. 374/755 cut-off events. For 2268/2268 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3904 event pairs, 140 based on Foata normal form. 18/773 useless extension candidates. Maximal degree in co-relation 2853. Up to 608 conditions per place. [2023-11-06 22:44:07,206 INFO L140 encePairwiseOnDemand]: 620/625 looper letters, 50 selfloop transitions, 12 changer transitions 1/63 dead transitions. [2023-11-06 22:44:07,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 63 transitions, 524 flow [2023-11-06 22:44:07,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:44:07,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:44:07,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1314 transitions. [2023-11-06 22:44:07,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42048 [2023-11-06 22:44:07,210 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1314 transitions. [2023-11-06 22:44:07,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1314 transitions. [2023-11-06 22:44:07,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:07,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1314 transitions. [2023-11-06 22:44:07,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 262.8) internal successors, (1314), 5 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:07,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:07,218 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:07,218 INFO L175 Difference]: Start difference. First operand has 62 places, 38 transitions, 279 flow. Second operand 5 states and 1314 transitions. [2023-11-06 22:44:07,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 63 transitions, 524 flow [2023-11-06 22:44:07,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 500 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-06 22:44:07,226 INFO L231 Difference]: Finished difference. Result has 65 places, 42 transitions, 329 flow [2023-11-06 22:44:07,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=329, PETRI_PLACES=65, PETRI_TRANSITIONS=42} [2023-11-06 22:44:07,227 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 29 predicate places. [2023-11-06 22:44:07,227 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 42 transitions, 329 flow [2023-11-06 22:44:07,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:07,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:07,228 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:07,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:44:07,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:07,442 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:44:07,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:07,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1751001332, now seen corresponding path program 3 times [2023-11-06 22:44:07,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:44:07,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606038888] [2023-11-06 22:44:07,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:44:07,443 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 [2023-11-06 22:44:07,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:44:07,444 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:44:07,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-11-06 22:44:07,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:44:07,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:44:07,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:44:07,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:44:07,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:44:07,750 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:44:07,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606038888] [2023-11-06 22:44:07,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606038888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:44:07,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:44:07,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:44:07,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164618185] [2023-11-06 22:44:07,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:44:07,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:44:07,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:44:07,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:44:07,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:44:07,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 625 [2023-11-06 22:44:07,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 42 transitions, 329 flow. Second operand has 5 states, 5 states have (on average 256.2) internal successors, (1281), 5 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:07,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:07,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 625 [2023-11-06 22:44:07,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:08,414 INFO L124 PetriNetUnfolderBase]: 368/725 cut-off events. [2023-11-06 22:44:08,414 INFO L125 PetriNetUnfolderBase]: For 2534/2534 co-relation queries the response was YES. [2023-11-06 22:44:08,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2948 conditions, 725 events. 368/725 cut-off events. For 2534/2534 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3568 event pairs, 234 based on Foata normal form. 2/727 useless extension candidates. Maximal degree in co-relation 2923. Up to 572 conditions per place. [2023-11-06 22:44:08,421 INFO L140 encePairwiseOnDemand]: 620/625 looper letters, 43 selfloop transitions, 10 changer transitions 2/55 dead transitions. [2023-11-06 22:44:08,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 55 transitions, 486 flow [2023-11-06 22:44:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:44:08,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:44:08,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1300 transitions. [2023-11-06 22:44:08,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.416 [2023-11-06 22:44:08,423 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1300 transitions. [2023-11-06 22:44:08,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1300 transitions. [2023-11-06 22:44:08,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:08,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1300 transitions. [2023-11-06 22:44:08,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 260.0) internal successors, (1300), 5 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:08,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:08,428 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:08,428 INFO L175 Difference]: Start difference. First operand has 65 places, 42 transitions, 329 flow. Second operand 5 states and 1300 transitions. [2023-11-06 22:44:08,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 55 transitions, 486 flow [2023-11-06 22:44:08,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 55 transitions, 481 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:44:08,433 INFO L231 Difference]: Finished difference. Result has 69 places, 42 transitions, 349 flow [2023-11-06 22:44:08,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=349, PETRI_PLACES=69, PETRI_TRANSITIONS=42} [2023-11-06 22:44:08,434 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 33 predicate places. [2023-11-06 22:44:08,434 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 42 transitions, 349 flow [2023-11-06 22:44:08,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 256.2) internal successors, (1281), 5 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:08,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:08,434 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:08,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2023-11-06 22:44:08,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:08,635 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:44:08,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:08,635 INFO L85 PathProgramCache]: Analyzing trace with hash -375026795, now seen corresponding path program 3 times [2023-11-06 22:44:08,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:44:08,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807014393] [2023-11-06 22:44:08,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:44:08,635 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 [2023-11-06 22:44:08,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:44:08,636 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:44:08,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-11-06 22:44:08,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:44:08,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:44:08,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:44:08,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:44:08,918 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:44:08,918 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:44:08,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807014393] [2023-11-06 22:44:08,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807014393] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:44:08,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:44:08,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:44:08,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894631678] [2023-11-06 22:44:08,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:44:08,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:44:08,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:44:08,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:44:08,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:44:09,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 625 [2023-11-06 22:44:09,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 42 transitions, 349 flow. Second operand has 5 states, 5 states have (on average 256.2) internal successors, (1281), 5 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:09,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:09,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 625 [2023-11-06 22:44:09,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:09,578 INFO L124 PetriNetUnfolderBase]: 355/710 cut-off events. [2023-11-06 22:44:09,578 INFO L125 PetriNetUnfolderBase]: For 2697/2697 co-relation queries the response was YES. [2023-11-06 22:44:09,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2907 conditions, 710 events. 355/710 cut-off events. For 2697/2697 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3527 event pairs, 200 based on Foata normal form. 12/722 useless extension candidates. Maximal degree in co-relation 2881. Up to 480 conditions per place. [2023-11-06 22:44:09,586 INFO L140 encePairwiseOnDemand]: 620/625 looper letters, 48 selfloop transitions, 13 changer transitions 1/62 dead transitions. [2023-11-06 22:44:09,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 62 transitions, 545 flow [2023-11-06 22:44:09,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:44:09,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:44:09,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1307 transitions. [2023-11-06 22:44:09,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41824 [2023-11-06 22:44:09,590 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1307 transitions. [2023-11-06 22:44:09,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1307 transitions. [2023-11-06 22:44:09,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:09,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1307 transitions. [2023-11-06 22:44:09,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 261.4) internal successors, (1307), 5 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:09,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:09,609 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:09,609 INFO L175 Difference]: Start difference. First operand has 69 places, 42 transitions, 349 flow. Second operand 5 states and 1307 transitions. [2023-11-06 22:44:09,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 62 transitions, 545 flow [2023-11-06 22:44:09,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 62 transitions, 523 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:44:09,617 INFO L231 Difference]: Finished difference. Result has 70 places, 42 transitions, 357 flow [2023-11-06 22:44:09,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=357, PETRI_PLACES=70, PETRI_TRANSITIONS=42} [2023-11-06 22:44:09,618 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2023-11-06 22:44:09,618 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 42 transitions, 357 flow [2023-11-06 22:44:09,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 256.2) internal successors, (1281), 5 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:09,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:09,619 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:09,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-11-06 22:44:09,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:09,832 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:44:09,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:09,832 INFO L85 PathProgramCache]: Analyzing trace with hash 268483900, now seen corresponding path program 4 times [2023-11-06 22:44:09,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:44:09,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121140482] [2023-11-06 22:44:09,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:44:09,833 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 [2023-11-06 22:44:09,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:44:09,834 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:44:09,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-11-06 22:44:10,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:44:10,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:44:10,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:44:10,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:44:10,126 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:44:10,126 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:44:10,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121140482] [2023-11-06 22:44:10,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121140482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:44:10,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:44:10,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:44:10,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784635324] [2023-11-06 22:44:10,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:44:10,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:44:10,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:44:10,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:44:10,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:44:10,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 625 [2023-11-06 22:44:10,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 42 transitions, 357 flow. Second operand has 5 states, 5 states have (on average 256.2) internal successors, (1281), 5 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:10,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:10,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 625 [2023-11-06 22:44:10,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:10,822 INFO L124 PetriNetUnfolderBase]: 330/655 cut-off events. [2023-11-06 22:44:10,822 INFO L125 PetriNetUnfolderBase]: For 2716/2716 co-relation queries the response was YES. [2023-11-06 22:44:10,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2697 conditions, 655 events. 330/655 cut-off events. For 2716/2716 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3111 event pairs, 203 based on Foata normal form. 18/673 useless extension candidates. Maximal degree in co-relation 2670. Up to 537 conditions per place. [2023-11-06 22:44:10,830 INFO L140 encePairwiseOnDemand]: 620/625 looper letters, 44 selfloop transitions, 13 changer transitions 1/58 dead transitions. [2023-11-06 22:44:10,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 58 transitions, 541 flow [2023-11-06 22:44:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:44:10,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:44:10,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1303 transitions. [2023-11-06 22:44:10,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41696 [2023-11-06 22:44:10,834 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1303 transitions. [2023-11-06 22:44:10,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1303 transitions. [2023-11-06 22:44:10,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:10,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1303 transitions. [2023-11-06 22:44:10,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 260.6) internal successors, (1303), 5 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:10,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:10,842 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:10,842 INFO L175 Difference]: Start difference. First operand has 70 places, 42 transitions, 357 flow. Second operand 5 states and 1303 transitions. [2023-11-06 22:44:10,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 58 transitions, 541 flow [2023-11-06 22:44:10,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 58 transitions, 507 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-06 22:44:10,850 INFO L231 Difference]: Finished difference. Result has 69 places, 42 transitions, 348 flow [2023-11-06 22:44:10,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=348, PETRI_PLACES=69, PETRI_TRANSITIONS=42} [2023-11-06 22:44:10,851 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 33 predicate places. [2023-11-06 22:44:10,851 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 42 transitions, 348 flow [2023-11-06 22:44:10,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 256.2) internal successors, (1281), 5 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:10,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:10,852 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:10,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-11-06 22:44:11,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:11,061 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:44:11,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:11,061 INFO L85 PathProgramCache]: Analyzing trace with hash 781758909, now seen corresponding path program 4 times [2023-11-06 22:44:11,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:44:11,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15381610] [2023-11-06 22:44:11,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:44:11,062 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 [2023-11-06 22:44:11,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:44:11,063 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:44:11,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-11-06 22:44:11,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:44:11,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:44:11,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:44:11,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:44:11,331 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:44:11,331 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:44:11,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15381610] [2023-11-06 22:44:11,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15381610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:44:11,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:44:11,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:44:11,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701248548] [2023-11-06 22:44:11,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:44:11,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:44:11,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:44:11,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:44:11,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:44:11,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 625 [2023-11-06 22:44:11,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 42 transitions, 348 flow. Second operand has 5 states, 5 states have (on average 256.2) internal successors, (1281), 5 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:11,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:11,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 625 [2023-11-06 22:44:11,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:11,891 INFO L124 PetriNetUnfolderBase]: 311/604 cut-off events. [2023-11-06 22:44:11,891 INFO L125 PetriNetUnfolderBase]: For 2063/2063 co-relation queries the response was YES. [2023-11-06 22:44:11,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2495 conditions, 604 events. 311/604 cut-off events. For 2063/2063 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2718 event pairs, 187 based on Foata normal form. 4/608 useless extension candidates. Maximal degree in co-relation 2470. Up to 489 conditions per place. [2023-11-06 22:44:11,897 INFO L140 encePairwiseOnDemand]: 620/625 looper letters, 35 selfloop transitions, 12 changer transitions 4/51 dead transitions. [2023-11-06 22:44:11,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 51 transitions, 471 flow [2023-11-06 22:44:11,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:44:11,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:44:11,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1297 transitions. [2023-11-06 22:44:11,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41504 [2023-11-06 22:44:11,899 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1297 transitions. [2023-11-06 22:44:11,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1297 transitions. [2023-11-06 22:44:11,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:11,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1297 transitions. [2023-11-06 22:44:11,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 259.4) internal successors, (1297), 5 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:11,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:11,903 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 625.0) internal successors, (3750), 6 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:11,903 INFO L175 Difference]: Start difference. First operand has 69 places, 42 transitions, 348 flow. Second operand 5 states and 1297 transitions. [2023-11-06 22:44:11,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 51 transitions, 471 flow [2023-11-06 22:44:11,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 51 transitions, 425 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-11-06 22:44:11,908 INFO L231 Difference]: Finished difference. Result has 65 places, 40 transitions, 307 flow [2023-11-06 22:44:11,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=65, PETRI_TRANSITIONS=40} [2023-11-06 22:44:11,909 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 29 predicate places. [2023-11-06 22:44:11,909 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 40 transitions, 307 flow [2023-11-06 22:44:11,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 256.2) internal successors, (1281), 5 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:11,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:11,910 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:11,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2023-11-06 22:44:12,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:12,114 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:44:12,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:12,114 INFO L85 PathProgramCache]: Analyzing trace with hash 576867206, now seen corresponding path program 1 times [2023-11-06 22:44:12,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:44:12,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810507169] [2023-11-06 22:44:12,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:12,115 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:12,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:44:12,116 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:44:12,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-11-06 22:44:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:12,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:44:12,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:13,109 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:44:13,110 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 524 treesize of output 194 [2023-11-06 22:44:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:44:13,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:44:17,891 INFO L322 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-11-06 22:44:17,891 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 822 treesize of output 358 [2023-11-06 22:44:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:44:34,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:44:34,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810507169] [2023-11-06 22:44:34,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810507169] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:44:34,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:44:34,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-06 22:44:34,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026741501] [2023-11-06 22:44:34,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:44:34,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:44:34,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:44:34,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:44:34,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:44:50,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:44:56,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 625 [2023-11-06 22:44:56,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 40 transitions, 307 flow. Second operand has 14 states, 14 states have (on average 229.14285714285714) internal successors, (3208), 14 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:56,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:56,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 625 [2023-11-06 22:44:56,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:01,890 INFO L124 PetriNetUnfolderBase]: 375/733 cut-off events. [2023-11-06 22:45:01,890 INFO L125 PetriNetUnfolderBase]: For 1903/1903 co-relation queries the response was YES. [2023-11-06 22:45:01,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2859 conditions, 733 events. 375/733 cut-off events. For 1903/1903 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3750 event pairs, 50 based on Foata normal form. 5/738 useless extension candidates. Maximal degree in co-relation 2837. Up to 287 conditions per place. [2023-11-06 22:45:01,897 INFO L140 encePairwiseOnDemand]: 618/625 looper letters, 67 selfloop transitions, 15 changer transitions 11/93 dead transitions. [2023-11-06 22:45:01,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 93 transitions, 798 flow [2023-11-06 22:45:01,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:45:01,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:45:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1875 transitions. [2023-11-06 22:45:01,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-11-06 22:45:01,901 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1875 transitions. [2023-11-06 22:45:01,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1875 transitions. [2023-11-06 22:45:01,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:01,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1875 transitions. [2023-11-06 22:45:01,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 234.375) internal successors, (1875), 8 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:45:01,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 625.0) internal successors, (5625), 9 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:45:01,908 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 625.0) internal successors, (5625), 9 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:45:01,908 INFO L175 Difference]: Start difference. First operand has 65 places, 40 transitions, 307 flow. Second operand 8 states and 1875 transitions. [2023-11-06 22:45:01,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 93 transitions, 798 flow [2023-11-06 22:45:01,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 93 transitions, 737 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:45:01,914 INFO L231 Difference]: Finished difference. Result has 69 places, 45 transitions, 354 flow [2023-11-06 22:45:01,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=354, PETRI_PLACES=69, PETRI_TRANSITIONS=45} [2023-11-06 22:45:01,915 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 33 predicate places. [2023-11-06 22:45:01,915 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 45 transitions, 354 flow [2023-11-06 22:45:01,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 229.14285714285714) internal successors, (3208), 14 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:45:01,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:01,916 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:01,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:02,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:45:02,129 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 22:45:02,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:02,130 INFO L85 PathProgramCache]: Analyzing trace with hash -723578052, now seen corresponding path program 2 times [2023-11-06 22:45:02,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:45:02,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580384299] [2023-11-06 22:45:02,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:45:02,130 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:45:02,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:45:02,131 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:45:02,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c796a088-f9f0-4be7-bae2-1f82a18d739d/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-11-06 22:45:02,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:45:02,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:45:02,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:45:02,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:02,862 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:45:02,862 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 635 treesize of output 239 [2023-11-06 22:45:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:45:03,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:09,616 INFO L322 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-11-06 22:45:09,618 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 813 treesize of output 371 [2023-11-06 22:45:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:45:34,391 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:45:34,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580384299] [2023-11-06 22:45:34,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580384299] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:34,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:45:34,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-06 22:45:34,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375990652] [2023-11-06 22:45:34,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:34,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:45:34,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:45:34,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:45:34,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:45:37,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:45:43,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:45:45,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:45:52,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:45:54,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:46:00,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 625 [2023-11-06 22:46:00,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 45 transitions, 354 flow. Second operand has 14 states, 14 states have (on average 228.92857142857142) internal successors, (3205), 14 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:46:00,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:00,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 625 [2023-11-06 22:46:00,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:21,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:46:23,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:46:25,589 WARN L539 Checker$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] [2023-11-06 22:46:46,901 WARN L293 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 589 DAG size of output: 386 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:46:49,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1]