./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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_5f11a587-a257-42f5-a082-7888cc556948/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 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:22:27,371 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:22:27,493 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:22:27,505 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:22:27,506 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:22:27,547 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:22:27,548 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:22:27,548 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:22:27,549 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:22:27,556 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:22:27,558 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:22:27,558 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:22:27,559 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:22:27,561 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:22:27,561 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:22:27,562 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:22:27,562 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:22:27,563 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:22:27,563 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:22:27,564 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:22:27,564 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:22:27,565 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:22:27,565 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:22:27,567 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:22:27,568 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:22:27,568 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:22:27,569 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:22:27,570 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:22:27,570 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:22:27,571 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:22:27,572 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:22:27,572 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:22:27,573 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:22:27,573 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:22:27,573 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:22:27,573 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:22:27,574 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:22:27,574 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:22:27,574 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_5f11a587-a257-42f5-a082-7888cc556948/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 [2023-11-06 22:22:27,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:22:27,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:22:27,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:22:27,874 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:22:27,874 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:22:27,876 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2023-11-06 22:22:30,912 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:22:31,129 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:22:31,130 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2023-11-06 22:22:31,139 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/data/ed61fe08e/aeee38057f7a43fcbc20e198521f6b52/FLAGef561bce3 [2023-11-06 22:22:31,155 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/data/ed61fe08e/aeee38057f7a43fcbc20e198521f6b52 [2023-11-06 22:22:31,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:22:31,160 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:22:31,161 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:22:31,162 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:22:31,167 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:22:31,167 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:22:31" (1/1) ... [2023-11-06 22:22:31,168 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35569a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:31, skipping insertion in model container [2023-11-06 22:22:31,169 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:22:31" (1/1) ... [2023-11-06 22:22:31,196 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:22:31,477 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:22:31,498 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 22:22:31,500 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5c31fa3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:31, skipping insertion in model container [2023-11-06 22:22:31,500 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:22:31,500 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 22:22:31,503 INFO L158 Benchmark]: Toolchain (without parser) took 341.85ms. Allocated memory is still 146.8MB. Free memory was 100.4MB in the beginning and 90.0MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:22:31,504 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 146.8MB. Free memory is still 89.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:22:31,506 INFO L158 Benchmark]: CACSL2BoogieTranslator took 339.07ms. Allocated memory is still 146.8MB. Free memory was 100.0MB in the beginning and 90.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:22:31,508 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 146.8MB. Free memory is still 89.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 339.07ms. Allocated memory is still 146.8MB. Free memory was 100.0MB in the beginning and 90.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: 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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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_5f11a587-a257-42f5-a082-7888cc556948/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 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:22:33,975 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:22:34,079 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 22:22:34,085 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:22:34,086 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:22:34,139 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:22:34,140 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:22:34,141 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:22:34,142 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:22:34,147 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:22:34,148 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:22:34,149 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:22:34,149 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:22:34,151 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:22:34,151 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:22:34,152 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:22:34,152 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:22:34,153 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:22:34,153 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:22:34,154 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:22:34,154 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:22:34,155 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:22:34,155 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:22:34,155 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 22:22:34,156 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 22:22:34,156 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:22:34,157 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:22:34,157 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:22:34,158 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:22:34,159 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:22:34,160 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:22:34,160 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:22:34,161 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:22:34,161 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:22:34,162 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 22:22:34,162 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 22:22:34,162 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:22:34,162 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:22:34,163 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:22:34,164 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 22:22:34,164 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:22:34,164 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_5f11a587-a257-42f5-a082-7888cc556948/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 [2023-11-06 22:22:34,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:22:34,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:22:34,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:22:34,634 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:22:34,635 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:22:34,636 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2023-11-06 22:22:37,782 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:22:38,043 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:22:38,043 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2023-11-06 22:22:38,058 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/data/26a855cb5/91058d3987b54c948903aa1da191b436/FLAGe59456907 [2023-11-06 22:22:38,075 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/data/26a855cb5/91058d3987b54c948903aa1da191b436 [2023-11-06 22:22:38,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:22:38,085 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:22:38,091 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:22:38,091 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:22:38,096 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:22:38,097 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:22:38" (1/1) ... [2023-11-06 22:22:38,098 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c2974ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:38, skipping insertion in model container [2023-11-06 22:22:38,098 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:22:38" (1/1) ... [2023-11-06 22:22:38,133 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:22:38,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:22:38,424 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 22:22:38,436 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:22:38,465 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:22:38,482 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:22:38,514 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:22:38,539 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:22:38,539 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:38 WrapperNode [2023-11-06 22:22:38,540 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:22:38,541 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:22:38,541 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:22:38,541 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:22:38,549 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:38" (1/1) ... [2023-11-06 22:22:38,575 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:38" (1/1) ... [2023-11-06 22:22:38,615 INFO L138 Inliner]: procedures = 26, calls = 38, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 107 [2023-11-06 22:22:38,615 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:22:38,616 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:22:38,616 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:22:38,616 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:22:38,626 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:38" (1/1) ... [2023-11-06 22:22:38,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:38" (1/1) ... [2023-11-06 22:22:38,653 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:38" (1/1) ... [2023-11-06 22:22:38,654 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:38" (1/1) ... [2023-11-06 22:22:38,663 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:38" (1/1) ... [2023-11-06 22:22:38,683 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:38" (1/1) ... [2023-11-06 22:22:38,686 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:38" (1/1) ... [2023-11-06 22:22:38,688 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:38" (1/1) ... [2023-11-06 22:22:38,691 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:22:38,692 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:22:38,692 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:22:38,693 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:22:38,694 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:38" (1/1) ... [2023-11-06 22:22:38,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:22:38,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:38,745 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:22:38,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:22:38,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:22:38,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 22:22:38,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:22:38,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 22:22:38,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:22:38,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:22:38,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:22:38,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:22:38,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:22:38,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:22:38,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:22:38,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:22:38,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:22:38,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:22:38,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 22:22:38,790 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 22:22:38,983 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:22:38,985 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:22:39,725 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:22:39,739 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:22:39,740 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 22:22:39,744 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:22:39 BoogieIcfgContainer [2023-11-06 22:22:39,745 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:22:39,749 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:22:39,749 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:22:39,752 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:22:39,752 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:22:38" (1/3) ... [2023-11-06 22:22:39,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59929ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:22:39, skipping insertion in model container [2023-11-06 22:22:39,755 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:38" (2/3) ... [2023-11-06 22:22:39,756 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59929ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:22:39, skipping insertion in model container [2023-11-06 22:22:39,756 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:22:39" (3/3) ... [2023-11-06 22:22:39,759 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2023-11-06 22:22:39,780 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:22:39,780 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-11-06 22:22:39,780 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:22:39,960 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:22:40,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 217 transitions, 455 flow [2023-11-06 22:22:40,147 INFO L124 PetriNetUnfolderBase]: 15/214 cut-off events. [2023-11-06 22:22:40,148 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:22:40,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 214 events. 15/214 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 358 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 150. Up to 2 conditions per place. [2023-11-06 22:22:40,156 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 217 transitions, 455 flow [2023-11-06 22:22:40,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 209 transitions, 436 flow [2023-11-06 22:22:40,175 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:22:40,190 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 204 places, 209 transitions, 436 flow [2023-11-06 22:22:40,195 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 204 places, 209 transitions, 436 flow [2023-11-06 22:22:40,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 209 transitions, 436 flow [2023-11-06 22:22:40,271 INFO L124 PetriNetUnfolderBase]: 15/209 cut-off events. [2023-11-06 22:22:40,271 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:22:40,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 209 events. 15/209 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 356 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 150. Up to 2 conditions per place. [2023-11-06 22:22:40,278 INFO L119 LiptonReduction]: Number of co-enabled transitions 6048 [2023-11-06 22:23:14,208 INFO L134 LiptonReduction]: Checked pairs total: 7802 [2023-11-06 22:23:14,209 INFO L136 LiptonReduction]: Total number of compositions: 229 [2023-11-06 22:23:14,224 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:23:14,231 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;@735e83ae, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:23:14,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2023-11-06 22:23:14,235 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:23:14,235 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:23:14,235 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:23:14,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:14,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:23:14,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:23:14,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:14,242 INFO L85 PathProgramCache]: Analyzing trace with hash 26631, now seen corresponding path program 1 times [2023-11-06 22:23:14,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:23:14,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438484273] [2023-11-06 22:23:14,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:14,256 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 22:23:14,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:23:14,265 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:14,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:14,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:23:14,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:14,572 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 18 treesize of output 7 [2023-11-06 22:23:14,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,624 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:23:14,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,658 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 18 treesize of output 1 [2023-11-06 22:23:14,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,674 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 13 treesize of output 1 [2023-11-06 22:23:14,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,695 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 13 treesize of output 1 [2023-11-06 22:23:14,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,721 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 18 treesize of output 1 [2023-11-06 22:23:14,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,743 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 13 treesize of output 1 [2023-11-06 22:23:14,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,765 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 18 treesize of output 1 [2023-11-06 22:23:14,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,779 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 13 treesize of output 1 [2023-11-06 22:23:14,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,787 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 8 treesize of output 1 [2023-11-06 22:23:14,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,798 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 8 treesize of output 1 [2023-11-06 22:23:14,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,809 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 13 treesize of output 1 [2023-11-06 22:23:14,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,834 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 18 treesize of output 1 [2023-11-06 22:23:14,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,846 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 13 treesize of output 1 [2023-11-06 22:23:14,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,857 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 8 treesize of output 1 [2023-11-06 22:23:14,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,890 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 13 treesize of output 1 [2023-11-06 22:23:14,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,903 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 13 treesize of output 1 [2023-11-06 22:23:14,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,910 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 8 treesize of output 1 [2023-11-06 22:23:14,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,928 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 13 treesize of output 1 [2023-11-06 22:23:14,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,950 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 18 treesize of output 1 [2023-11-06 22:23:14,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,963 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 13 treesize of output 1 [2023-11-06 22:23:14,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,971 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 8 treesize of output 1 [2023-11-06 22:23:14,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,984 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 13 treesize of output 1 [2023-11-06 22:23:14,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:14,992 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 8 treesize of output 1 [2023-11-06 22:23:15,017 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 22:23:15,018 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:15,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:23:15,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438484273] [2023-11-06 22:23:15,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438484273] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:15,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:15,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:23:15,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929370974] [2023-11-06 22:23:15,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:15,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:23:15,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:23:15,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:23:15,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:15,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 446 [2023-11-06 22:23:15,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:15,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:15,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 446 [2023-11-06 22:23:15,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:16,931 INFO L124 PetriNetUnfolderBase]: 6849/8451 cut-off events. [2023-11-06 22:23:16,932 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2023-11-06 22:23:16,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17013 conditions, 8451 events. 6849/8451 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 35863 event pairs, 3106 based on Foata normal form. 0/2122 useless extension candidates. Maximal degree in co-relation 15279. Up to 8393 conditions per place. [2023-11-06 22:23:17,027 INFO L140 encePairwiseOnDemand]: 436/446 looper letters, 48 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2023-11-06 22:23:17,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 236 flow [2023-11-06 22:23:17,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:23:17,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:23:17,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 637 transitions. [2023-11-06 22:23:17,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4760837070254111 [2023-11-06 22:23:17,046 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 637 transitions. [2023-11-06 22:23:17,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 637 transitions. [2023-11-06 22:23:17,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:17,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 637 transitions. [2023-11-06 22:23:17,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 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 22:23:17,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:23:17,065 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:23:17,067 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 128 flow. Second operand 3 states and 637 transitions. [2023-11-06 22:23:17,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 236 flow [2023-11-06 22:23:17,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 56 transitions, 224 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 22:23:17,080 INFO L231 Difference]: Finished difference. Result has 52 places, 55 transitions, 141 flow [2023-11-06 22:23:17,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=52, PETRI_TRANSITIONS=55} [2023-11-06 22:23:17,086 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -7 predicate places. [2023-11-06 22:23:17,086 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 55 transitions, 141 flow [2023-11-06 22:23:17,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:17,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:17,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:23:17,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:17,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:17,299 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:23:17,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:17,300 INFO L85 PathProgramCache]: Analyzing trace with hash 26716, now seen corresponding path program 1 times [2023-11-06 22:23:17,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:23:17,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776819335] [2023-11-06 22:23:17,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:17,301 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 22:23:17,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:23:17,304 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:17,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:17,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:23:17,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:17,437 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 22:23:17,437 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:17,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:23:17,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776819335] [2023-11-06 22:23:17,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776819335] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:17,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:17,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:23:17,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966882156] [2023-11-06 22:23:17,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:17,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:23:17,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:23:17,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:23:17,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:17,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 446 [2023-11-06 22:23:17,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 55 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 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 22:23:17,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:17,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 446 [2023-11-06 22:23:17,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:19,244 INFO L124 PetriNetUnfolderBase]: 6846/8448 cut-off events. [2023-11-06 22:23:19,244 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:23:19,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16908 conditions, 8448 events. 6846/8448 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 35701 event pairs, 3106 based on Foata normal form. 0/2124 useless extension candidates. Maximal degree in co-relation 16895. Up to 8390 conditions per place. [2023-11-06 22:23:19,355 INFO L140 encePairwiseOnDemand]: 441/446 looper letters, 48 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-11-06 22:23:19,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 228 flow [2023-11-06 22:23:19,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:23:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:23:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 638 transitions. [2023-11-06 22:23:19,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.476831091180867 [2023-11-06 22:23:19,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 638 transitions. [2023-11-06 22:23:19,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 638 transitions. [2023-11-06 22:23:19,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:19,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 638 transitions. [2023-11-06 22:23:19,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 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 22:23:19,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:23:19,370 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:23:19,371 INFO L175 Difference]: Start difference. First operand has 52 places, 55 transitions, 141 flow. Second operand 3 states and 638 transitions. [2023-11-06 22:23:19,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 228 flow [2023-11-06 22:23:19,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:23:19,374 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 128 flow [2023-11-06 22:23:19,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-11-06 22:23:19,375 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -6 predicate places. [2023-11-06 22:23:19,376 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 128 flow [2023-11-06 22:23:19,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 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 22:23:19,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:19,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:23:19,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:19,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:19,589 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:23:19,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:19,590 INFO L85 PathProgramCache]: Analyzing trace with hash 26629, now seen corresponding path program 1 times [2023-11-06 22:23:19,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:23:19,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096825055] [2023-11-06 22:23:19,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:19,591 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 22:23:19,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:23:19,592 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:19,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:19,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:23:19,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:19,668 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 22:23:19,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,676 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 22:23:19,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,701 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 22:23:19,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,710 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 22:23:19,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,719 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 22:23:19,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,724 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 22:23:19,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,744 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 22:23:19,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,753 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 22:23:19,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,760 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 22:23:19,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,768 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 22:23:19,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,777 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 22:23:19,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,783 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 22:23:19,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,805 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 22:23:19,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,814 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 22:23:19,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,831 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 22:23:19,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,839 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 22:23:19,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,857 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 22:23:19,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,882 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:23:19,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,895 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 22:23:19,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,911 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 22:23:19,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,918 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 22:23:19,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,926 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 22:23:19,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,936 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 22:23:19,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:19,941 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 22:23:19,945 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 22:23:19,945 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:19,946 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:23:19,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096825055] [2023-11-06 22:23:19,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096825055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:19,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:19,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:23:19,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518892106] [2023-11-06 22:23:19,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:19,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:23:19,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:23:19,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:23:19,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:20,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 446 [2023-11-06 22:23:20,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 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 22:23:20,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:20,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 446 [2023-11-06 22:23:20,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:21,414 INFO L124 PetriNetUnfolderBase]: 6846/8446 cut-off events. [2023-11-06 22:23:21,414 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:23:21,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16905 conditions, 8446 events. 6846/8446 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 35963 event pairs, 3106 based on Foata normal form. 2/2124 useless extension candidates. Maximal degree in co-relation 16893. Up to 8386 conditions per place. [2023-11-06 22:23:21,467 INFO L140 encePairwiseOnDemand]: 441/446 looper letters, 44 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-11-06 22:23:21,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 51 transitions, 222 flow [2023-11-06 22:23:21,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:23:21,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:23:21,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2023-11-06 22:23:21,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47085201793721976 [2023-11-06 22:23:21,471 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2023-11-06 22:23:21,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2023-11-06 22:23:21,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:21,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2023-11-06 22:23:21,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 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 22:23:21,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:23:21,480 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:23:21,481 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 128 flow. Second operand 3 states and 630 transitions. [2023-11-06 22:23:21,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 51 transitions, 222 flow [2023-11-06 22:23:21,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 216 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-06 22:23:21,484 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 128 flow [2023-11-06 22:23:21,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-11-06 22:23:21,485 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -7 predicate places. [2023-11-06 22:23:21,485 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 128 flow [2023-11-06 22:23:21,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 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 22:23:21,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:21,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:23:21,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:21,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:21,699 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:23:21,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:21,700 INFO L85 PathProgramCache]: Analyzing trace with hash 827415, now seen corresponding path program 1 times [2023-11-06 22:23:21,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:23:21,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229286614] [2023-11-06 22:23:21,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:21,701 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 22:23:21,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:23:21,710 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:21,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:21,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:23:21,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:21,915 INFO L322 Elim1Store]: treesize reduction 103, result has 12.7 percent of original size [2023-11-06 22:23:21,915 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 40 [2023-11-06 22:23:22,005 INFO L322 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2023-11-06 22:23:22,006 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 40 [2023-11-06 22:23:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:23:22,220 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:22,220 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:23:22,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229286614] [2023-11-06 22:23:22,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229286614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:22,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:22,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:23:22,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346767384] [2023-11-06 22:23:22,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:22,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:23:22,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:23:22,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:23:22,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:22,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 446 [2023-11-06 22:23:22,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 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 22:23:22,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:22,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 446 [2023-11-06 22:23:22,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:23,933 INFO L124 PetriNetUnfolderBase]: 5313/6618 cut-off events. [2023-11-06 22:23:23,933 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-06 22:23:23,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13248 conditions, 6618 events. 5313/6618 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 27817 event pairs, 2406 based on Foata normal form. 0/1773 useless extension candidates. Maximal degree in co-relation 13224. Up to 6561 conditions per place. [2023-11-06 22:23:23,980 INFO L140 encePairwiseOnDemand]: 443/446 looper letters, 45 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-11-06 22:23:23,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 212 flow [2023-11-06 22:23:23,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:23:23,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:23:23,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2023-11-06 22:23:23,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4701046337817638 [2023-11-06 22:23:23,984 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2023-11-06 22:23:23,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2023-11-06 22:23:23,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:23,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2023-11-06 22:23:23,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 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 22:23:23,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:23:23,993 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:23:23,993 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 128 flow. Second operand 3 states and 629 transitions. [2023-11-06 22:23:23,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 212 flow [2023-11-06 22:23:23,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 206 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:23:23,995 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 116 flow [2023-11-06 22:23:23,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2023-11-06 22:23:23,996 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -9 predicate places. [2023-11-06 22:23:23,996 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 116 flow [2023-11-06 22:23:23,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 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 22:23:23,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:23,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:23:24,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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)] Ended with exit code 0 [2023-11-06 22:23:24,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:24,209 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:23:24,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:24,209 INFO L85 PathProgramCache]: Analyzing trace with hash 827330, now seen corresponding path program 1 times [2023-11-06 22:23:24,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:23:24,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894573070] [2023-11-06 22:23:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:24,210 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 22:23:24,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:23:24,211 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:24,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:24,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:23:24,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:24,304 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 13 treesize of output 7 [2023-11-06 22:23:24,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,317 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 8 treesize of output 1 [2023-11-06 22:23:24,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,328 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 8 treesize of output 1 [2023-11-06 22:23:24,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,339 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 13 treesize of output 1 [2023-11-06 22:23:24,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,353 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 13 treesize of output 1 [2023-11-06 22:23:24,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,373 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 18 treesize of output 1 [2023-11-06 22:23:24,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,388 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 13 treesize of output 1 [2023-11-06 22:23:24,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,395 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 8 treesize of output 1 [2023-11-06 22:23:24,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,405 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 8 treesize of output 1 [2023-11-06 22:23:24,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,416 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 13 treesize of output 1 [2023-11-06 22:23:24,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,440 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 18 treesize of output 1 [2023-11-06 22:23:24,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,453 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 13 treesize of output 1 [2023-11-06 22:23:24,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,465 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 8 treesize of output 1 [2023-11-06 22:23:24,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,477 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 13 treesize of output 1 [2023-11-06 22:23:24,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,486 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 8 treesize of output 1 [2023-11-06 22:23:24,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,499 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 13 treesize of output 1 [2023-11-06 22:23:24,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,526 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 18 treesize of output 1 [2023-11-06 22:23:24,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,540 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 13 treesize of output 1 [2023-11-06 22:23:24,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,568 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 18 treesize of output 1 [2023-11-06 22:23:24,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,579 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 13 treesize of output 1 [2023-11-06 22:23:24,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,601 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 18 treesize of output 1 [2023-11-06 22:23:24,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,613 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 13 treesize of output 1 [2023-11-06 22:23:24,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,637 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 18 treesize of output 1 [2023-11-06 22:23:24,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:24,671 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:23:24,741 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 22:23:24,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:24,960 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 22:23:24,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:23:24,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894573070] [2023-11-06 22:23:24,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894573070] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:24,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:23:24,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 22:23:24,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640075348] [2023-11-06 22:23:24,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:24,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:23:24,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:23:24,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:23:24,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:23:26,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 446 [2023-11-06 22:23:26,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 116 flow. Second operand has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:26,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:26,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 446 [2023-11-06 22:23:26,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:27,862 INFO L124 PetriNetUnfolderBase]: 5319/6627 cut-off events. [2023-11-06 22:23:27,862 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:23:27,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13273 conditions, 6627 events. 5319/6627 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 27755 event pairs, 2406 based on Foata normal form. 0/1775 useless extension candidates. Maximal degree in co-relation 13265. Up to 6567 conditions per place. [2023-11-06 22:23:27,900 INFO L140 encePairwiseOnDemand]: 441/446 looper letters, 44 selfloop transitions, 11 changer transitions 0/58 dead transitions. [2023-11-06 22:23:27,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 58 transitions, 262 flow [2023-11-06 22:23:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:23:27,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:23:27,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1186 transitions. [2023-11-06 22:23:27,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431988041853513 [2023-11-06 22:23:27,907 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1186 transitions. [2023-11-06 22:23:27,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1186 transitions. [2023-11-06 22:23:27,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:27,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1186 transitions. [2023-11-06 22:23:27,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 197.66666666666666) internal successors, (1186), 6 states have internal predecessors, (1186), 0 states have call successors, (0), 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 22:23:27,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 446.0) internal successors, (3122), 7 states have internal predecessors, (3122), 0 states have call successors, (0), 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 22:23:27,923 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 446.0) internal successors, (3122), 7 states have internal predecessors, (3122), 0 states have call successors, (0), 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 22:23:27,923 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 116 flow. Second operand 6 states and 1186 transitions. [2023-11-06 22:23:27,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 58 transitions, 262 flow [2023-11-06 22:23:27,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 58 transitions, 261 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:23:27,928 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 197 flow [2023-11-06 22:23:27,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2023-11-06 22:23:27,932 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -2 predicate places. [2023-11-06 22:23:27,932 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 197 flow [2023-11-06 22:23:27,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:27,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:27,934 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-11-06 22:23:27,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:28,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:28,146 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:23:28,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:28,146 INFO L85 PathProgramCache]: Analyzing trace with hash 25649086, now seen corresponding path program 1 times [2023-11-06 22:23:28,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:23:28,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285906744] [2023-11-06 22:23:28,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:28,147 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 22:23:28,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:23:28,148 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:28,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:28,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:23:28,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:28,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:28,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:28,347 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 22:23:28,347 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2023-11-06 22:23:28,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:28,370 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-06 22:23:28,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:28,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:28,422 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 13 [2023-11-06 22:23:28,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:28,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:28,464 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 13 [2023-11-06 22:23:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:28,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:28,999 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:23:28,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285906744] [2023-11-06 22:23:28,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285906744] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:29,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:23:29,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-06 22:23:29,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983465942] [2023-11-06 22:23:29,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:29,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:23:29,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:23:29,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:23:29,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:23:32,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 446 [2023-11-06 22:23:32,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 197 flow. Second operand has 8 states, 8 states have (on average 182.0) internal successors, (1456), 8 states have internal predecessors, (1456), 0 states have call successors, (0), 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 22:23:32,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:32,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 446 [2023-11-06 22:23:32,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:34,128 INFO L124 PetriNetUnfolderBase]: 5319/6630 cut-off events. [2023-11-06 22:23:34,128 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-06 22:23:34,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13315 conditions, 6630 events. 5319/6630 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 27789 event pairs, 2406 based on Foata normal form. 0/1782 useless extension candidates. Maximal degree in co-relation 13303. Up to 6562 conditions per place. [2023-11-06 22:23:34,171 INFO L140 encePairwiseOnDemand]: 441/446 looper letters, 45 selfloop transitions, 13 changer transitions 0/61 dead transitions. [2023-11-06 22:23:34,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 61 transitions, 336 flow [2023-11-06 22:23:34,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:23:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:23:34,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1511 transitions. [2023-11-06 22:23:34,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4234865470852018 [2023-11-06 22:23:34,180 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1511 transitions. [2023-11-06 22:23:34,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1511 transitions. [2023-11-06 22:23:34,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:34,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1511 transitions. [2023-11-06 22:23:34,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 188.875) internal successors, (1511), 8 states have internal predecessors, (1511), 0 states have call successors, (0), 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 22:23:34,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 446.0) internal successors, (4014), 9 states have internal predecessors, (4014), 0 states have call successors, (0), 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 22:23:34,194 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 446.0) internal successors, (4014), 9 states have internal predecessors, (4014), 0 states have call successors, (0), 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 22:23:34,194 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 197 flow. Second operand 8 states and 1511 transitions. [2023-11-06 22:23:34,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 61 transitions, 336 flow [2023-11-06 22:23:34,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 316 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-06 22:23:34,198 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 235 flow [2023-11-06 22:23:34,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=235, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2023-11-06 22:23:34,199 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2023-11-06 22:23:34,199 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 235 flow [2023-11-06 22:23:34,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 182.0) internal successors, (1456), 8 states have internal predecessors, (1456), 0 states have call successors, (0), 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 22:23:34,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:34,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:23:34,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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)] Ended with exit code 0 [2023-11-06 22:23:34,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:34,413 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:23:34,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:34,413 INFO L85 PathProgramCache]: Analyzing trace with hash 795165238, now seen corresponding path program 1 times [2023-11-06 22:23:34,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:23:34,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684335252] [2023-11-06 22:23:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:34,413 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 22:23:34,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:23:34,415 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:34,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:34,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:23:34,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:34,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:34,567 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 13 [2023-11-06 22:23:34,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:34,580 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 22:23:34,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:34,642 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 22:23:34,642 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2023-11-06 22:23:34,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:34,657 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 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 22:23:34,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:34,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:34,737 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:23:34,738 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 16 treesize of output 13 [2023-11-06 22:23:34,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:34,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:34,770 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 13 [2023-11-06 22:23:34,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:34,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:34,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:34,833 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:23:34,834 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 16 treesize of output 13 [2023-11-06 22:23:34,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:34,846 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 22:23:34,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:34,872 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 13 [2023-11-06 22:23:34,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:34,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:34,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:34,931 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:23:34,931 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 16 treesize of output 13 [2023-11-06 22:23:34,941 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 22:23:34,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:34,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:34,966 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 13 [2023-11-06 22:23:34,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:34,974 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 22:23:35,459 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 22:23:35,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:35,714 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 22:23:35,714 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:23:35,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684335252] [2023-11-06 22:23:35,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684335252] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:35,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:23:35,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-06 22:23:35,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278963917] [2023-11-06 22:23:35,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:35,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:23:35,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:23:35,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:23:35,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:23:37,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 446 [2023-11-06 22:23:37,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 235 flow. Second operand has 8 states, 8 states have (on average 184.25) internal successors, (1474), 8 states have internal predecessors, (1474), 0 states have call successors, (0), 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 22:23:37,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:37,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 446 [2023-11-06 22:23:37,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:39,216 INFO L124 PetriNetUnfolderBase]: 5159/6421 cut-off events. [2023-11-06 22:23:39,216 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-06 22:23:39,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12915 conditions, 6421 events. 5159/6421 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 26715 event pairs, 2330 based on Foata normal form. 0/1751 useless extension candidates. Maximal degree in co-relation 12899. Up to 6362 conditions per place. [2023-11-06 22:23:39,260 INFO L140 encePairwiseOnDemand]: 441/446 looper letters, 51 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2023-11-06 22:23:39,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 58 transitions, 341 flow [2023-11-06 22:23:39,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:23:39,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:23:39,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 963 transitions. [2023-11-06 22:23:39,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318385650224215 [2023-11-06 22:23:39,266 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 963 transitions. [2023-11-06 22:23:39,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 963 transitions. [2023-11-06 22:23:39,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:39,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 963 transitions. [2023-11-06 22:23:39,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 192.6) internal successors, (963), 5 states have internal predecessors, (963), 0 states have call successors, (0), 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 22:23:39,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 446.0) internal successors, (2676), 6 states have internal predecessors, (2676), 0 states have call successors, (0), 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 22:23:39,275 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 446.0) internal successors, (2676), 6 states have internal predecessors, (2676), 0 states have call successors, (0), 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 22:23:39,275 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 235 flow. Second operand 5 states and 963 transitions. [2023-11-06 22:23:39,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 58 transitions, 341 flow [2023-11-06 22:23:39,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 58 transitions, 312 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-06 22:23:39,279 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 210 flow [2023-11-06 22:23:39,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-11-06 22:23:39,281 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 5 predicate places. [2023-11-06 22:23:39,281 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 210 flow [2023-11-06 22:23:39,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 184.25) internal successors, (1474), 8 states have internal predecessors, (1474), 0 states have call successors, (0), 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 22:23:39,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:39,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:23:39,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:39,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:39,494 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:23:39,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:39,494 INFO L85 PathProgramCache]: Analyzing trace with hash 795165237, now seen corresponding path program 1 times [2023-11-06 22:23:39,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:23:39,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576636839] [2023-11-06 22:23:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:39,495 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 22:23:39,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:23:39,498 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:39,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:39,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:39,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:23:39,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:39,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:39,618 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 22:23:39,619 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 22:23:39,645 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:23:39,645 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 17 treesize of output 22 [2023-11-06 22:23:39,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:39,677 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:23:39,677 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 22:23:39,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:39,716 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 22:23:39,717 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-06 22:23:39,750 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:23:39,751 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 22:23:39,778 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 22:23:39,778 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 22:23:39,803 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 22:23:39,804 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 1 case distinctions, treesize of input 22 treesize of output 22 [2023-11-06 22:23:39,820 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:23:39,820 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 17 treesize of output 22 [2023-11-06 22:23:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:23:39,982 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:39,982 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:23:39,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576636839] [2023-11-06 22:23:39,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576636839] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:39,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:39,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:23:39,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963913096] [2023-11-06 22:23:39,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:39,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:23:39,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:23:39,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:23:39,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:40,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 446 [2023-11-06 22:23:40,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 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 22:23:40,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:40,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 446 [2023-11-06 22:23:40,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:40,952 INFO L124 PetriNetUnfolderBase]: 4999/6212 cut-off events. [2023-11-06 22:23:40,952 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-11-06 22:23:40,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12486 conditions, 6212 events. 4999/6212 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 25742 event pairs, 2254 based on Foata normal form. 0/1716 useless extension candidates. Maximal degree in co-relation 12469. Up to 6155 conditions per place. [2023-11-06 22:23:40,987 INFO L140 encePairwiseOnDemand]: 443/446 looper letters, 52 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-11-06 22:23:40,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 56 transitions, 312 flow [2023-11-06 22:23:40,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:23:40,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:23:40,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 616 transitions. [2023-11-06 22:23:40,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46038863976083705 [2023-11-06 22:23:40,990 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 616 transitions. [2023-11-06 22:23:40,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 616 transitions. [2023-11-06 22:23:40,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:40,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 616 transitions. [2023-11-06 22:23:40,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 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 22:23:40,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:23:40,996 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:23:40,997 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 210 flow. Second operand 3 states and 616 transitions. [2023-11-06 22:23:40,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 56 transitions, 312 flow [2023-11-06 22:23:40,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 56 transitions, 306 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:23:41,000 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 202 flow [2023-11-06 22:23:41,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-11-06 22:23:41,001 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-11-06 22:23:41,001 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 202 flow [2023-11-06 22:23:41,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 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 22:23:41,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:41,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:23:41,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:41,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:41,213 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:23:41,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:41,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1119688891, now seen corresponding path program 1 times [2023-11-06 22:23:41,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:23:41,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008259432] [2023-11-06 22:23:41,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:41,214 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 22:23:41,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:23:41,216 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:41,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:41,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:23:41,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:41,320 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2023-11-06 22:23:41,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,338 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 22:23:41,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,352 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 22:23:41,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,358 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 22:23:41,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,368 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 22:23:41,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,379 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 22:23:41,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,387 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 22:23:41,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,394 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 22:23:41,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,402 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 22:23:41,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,407 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 22:23:41,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,422 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 22:23:41,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,430 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 22:23:41,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,435 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 22:23:41,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,440 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 22:23:41,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,448 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 22:23:41,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,456 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 22:23:41,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,473 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 22:23:41,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,486 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 22:23:41,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,501 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 22:23:41,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,513 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 22:23:41,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,519 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 22:23:41,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,527 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 22:23:41,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,542 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 22:23:41,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:41,548 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 22:23:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:23:41,568 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:41,568 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:23:41,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008259432] [2023-11-06 22:23:41,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1008259432] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:41,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:41,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:23:41,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597071515] [2023-11-06 22:23:41,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:41,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:23:41,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:23:41,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:23:41,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:23:41,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 446 [2023-11-06 22:23:41,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 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 22:23:41,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:41,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 446 [2023-11-06 22:23:41,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:42,503 INFO L124 PetriNetUnfolderBase]: 3090/3879 cut-off events. [2023-11-06 22:23:42,503 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-06 22:23:42,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7819 conditions, 3879 events. 3090/3879 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 15224 event pairs, 1361 based on Foata normal form. 0/1240 useless extension candidates. Maximal degree in co-relation 7802. Up to 3825 conditions per place. [2023-11-06 22:23:42,523 INFO L140 encePairwiseOnDemand]: 440/446 looper letters, 42 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2023-11-06 22:23:42,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 53 transitions, 296 flow [2023-11-06 22:23:42,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:23:42,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:23:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 761 transitions. [2023-11-06 22:23:42,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265695067264574 [2023-11-06 22:23:42,527 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 761 transitions. [2023-11-06 22:23:42,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 761 transitions. [2023-11-06 22:23:42,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:42,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 761 transitions. [2023-11-06 22:23:42,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.25) internal successors, (761), 4 states have internal predecessors, (761), 0 states have call successors, (0), 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 22:23:42,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 446.0) internal successors, (2230), 5 states have internal predecessors, (2230), 0 states have call successors, (0), 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 22:23:42,535 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 446.0) internal successors, (2230), 5 states have internal predecessors, (2230), 0 states have call successors, (0), 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 22:23:42,535 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 202 flow. Second operand 4 states and 761 transitions. [2023-11-06 22:23:42,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 53 transitions, 296 flow [2023-11-06 22:23:42,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 53 transitions, 295 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:23:42,539 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 211 flow [2023-11-06 22:23:42,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=211, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2023-11-06 22:23:42,540 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-11-06 22:23:42,540 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 211 flow [2023-11-06 22:23:42,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 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 22:23:42,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:42,541 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 22:23:42,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:42,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:42,752 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:23:42,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:42,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1121059129, now seen corresponding path program 2 times [2023-11-06 22:23:42,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:23:42,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163726826] [2023-11-06 22:23:42,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:23:42,753 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 22:23:42,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:23:42,754 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:42,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:42,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:23:42,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:23:42,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:23:42,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:42,890 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 13 treesize of output 7 [2023-11-06 22:23:42,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:42,904 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 8 treesize of output 1 [2023-11-06 22:23:42,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:42,928 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 18 treesize of output 1 [2023-11-06 22:23:42,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:42,943 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 13 treesize of output 1 [2023-11-06 22:23:42,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:42,955 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 13 treesize of output 1 [2023-11-06 22:23:42,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:42,963 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 8 treesize of output 1 [2023-11-06 22:23:42,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:42,979 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 13 treesize of output 1 [2023-11-06 22:23:42,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:42,999 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 18 treesize of output 1 [2023-11-06 22:23:43,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:43,033 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:23:43,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:43,059 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 18 treesize of output 1 [2023-11-06 22:23:43,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:43,081 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 18 treesize of output 1 [2023-11-06 22:23:43,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:43,095 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 13 treesize of output 1 [2023-11-06 22:23:43,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:43,115 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 18 treesize of output 1 [2023-11-06 22:23:43,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:43,125 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 13 treesize of output 1 [2023-11-06 22:23:43,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:43,137 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 13 treesize of output 1 [2023-11-06 22:23:43,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:43,145 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 8 treesize of output 1 [2023-11-06 22:23:43,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:43,159 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 13 treesize of output 1 [2023-11-06 22:23:43,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:43,167 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 8 treesize of output 1 [2023-11-06 22:23:43,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:43,181 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 13 treesize of output 1 [2023-11-06 22:23:43,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:43,189 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 8 treesize of output 1 [2023-11-06 22:23:43,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:43,204 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 13 treesize of output 1 [2023-11-06 22:23:43,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:43,211 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 8 treesize of output 1 [2023-11-06 22:23:43,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:43,232 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 18 treesize of output 1 [2023-11-06 22:23:43,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:43,242 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 13 treesize of output 1 [2023-11-06 22:23:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:43,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:44,171 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:23:44,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163726826] [2023-11-06 22:23:44,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163726826] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:44,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:23:44,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:23:44,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940328891] [2023-11-06 22:23:44,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:44,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:23:44,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:23:44,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:23:44,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:23:51,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 446 [2023-11-06 22:23:51,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 211 flow. Second operand has 12 states, 12 states have (on average 190.0) internal successors, (2280), 12 states have internal predecessors, (2280), 0 states have call successors, (0), 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 22:23:51,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:51,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 446 [2023-11-06 22:23:51,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:54,969 INFO L124 PetriNetUnfolderBase]: 3097/3889 cut-off events. [2023-11-06 22:23:54,969 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-06 22:23:54,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7885 conditions, 3889 events. 3097/3889 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 15292 event pairs, 1361 based on Foata normal form. 6/1257 useless extension candidates. Maximal degree in co-relation 7867. Up to 3837 conditions per place. [2023-11-06 22:23:54,992 INFO L140 encePairwiseOnDemand]: 441/446 looper letters, 37 selfloop transitions, 24 changer transitions 0/64 dead transitions. [2023-11-06 22:23:54,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 64 transitions, 441 flow [2023-11-06 22:23:54,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:23:54,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:23:55,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2335 transitions. [2023-11-06 22:23:55,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43628550074738415 [2023-11-06 22:23:55,002 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2335 transitions. [2023-11-06 22:23:55,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2335 transitions. [2023-11-06 22:23:55,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:55,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2335 transitions. [2023-11-06 22:23:55,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 194.58333333333334) internal successors, (2335), 12 states have internal predecessors, (2335), 0 states have call successors, (0), 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 22:23:55,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 446.0) internal successors, (5798), 13 states have internal predecessors, (5798), 0 states have call successors, (0), 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 22:23:55,021 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 446.0) internal successors, (5798), 13 states have internal predecessors, (5798), 0 states have call successors, (0), 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 22:23:55,021 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 211 flow. Second operand 12 states and 2335 transitions. [2023-11-06 22:23:55,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 64 transitions, 441 flow [2023-11-06 22:23:55,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 397 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-11-06 22:23:55,025 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 353 flow [2023-11-06 22:23:55,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=353, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2023-11-06 22:23:55,026 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 10 predicate places. [2023-11-06 22:23:55,026 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 353 flow [2023-11-06 22:23:55,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 190.0) internal successors, (2280), 12 states have internal predecessors, (2280), 0 states have call successors, (0), 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 22:23:55,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:55,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:23:55,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:55,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:55,239 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:23:55,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:55,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1119688890, now seen corresponding path program 1 times [2023-11-06 22:23:55,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:23:55,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812642900] [2023-11-06 22:23:55,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:55,240 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 22:23:55,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:23:55,241 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:55,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:23:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:55,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:23:55,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:55,413 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 22:23:55,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:55,629 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 25 treesize of output 21 [2023-11-06 22:23:55,722 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 22:23:55,722 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:23:55,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812642900] [2023-11-06 22:23:55,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812642900] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:55,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:23:55,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:23:55,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480474331] [2023-11-06 22:23:55,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:55,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:23:55,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:23:55,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:23:55,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:23:59,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 446 [2023-11-06 22:24:00,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 353 flow. Second operand has 10 states, 10 states have (on average 185.2) internal successors, (1852), 10 states have internal predecessors, (1852), 0 states have call successors, (0), 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 22:24:00,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:00,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 446 [2023-11-06 22:24:00,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:02,030 INFO L124 PetriNetUnfolderBase]: 5112/6368 cut-off events. [2023-11-06 22:24:02,030 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-06 22:24:02,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12912 conditions, 6368 events. 5112/6368 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 27749 event pairs, 927 based on Foata normal form. 0/2166 useless extension candidates. Maximal degree in co-relation 12894. Up to 2671 conditions per place. [2023-11-06 22:24:02,067 INFO L140 encePairwiseOnDemand]: 435/446 looper letters, 81 selfloop transitions, 26 changer transitions 0/109 dead transitions. [2023-11-06 22:24:02,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 661 flow [2023-11-06 22:24:02,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:24:02,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:24:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1561 transitions. [2023-11-06 22:24:02,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-11-06 22:24:02,074 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1561 transitions. [2023-11-06 22:24:02,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1561 transitions. [2023-11-06 22:24:02,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:02,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1561 transitions. [2023-11-06 22:24:02,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 195.125) internal successors, (1561), 8 states have internal predecessors, (1561), 0 states have call successors, (0), 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 22:24:02,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 446.0) internal successors, (4014), 9 states have internal predecessors, (4014), 0 states have call successors, (0), 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 22:24:02,088 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 446.0) internal successors, (4014), 9 states have internal predecessors, (4014), 0 states have call successors, (0), 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 22:24:02,089 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 353 flow. Second operand 8 states and 1561 transitions. [2023-11-06 22:24:02,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 661 flow [2023-11-06 22:24:02,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 109 transitions, 545 flow, removed 45 selfloop flow, removed 8 redundant places. [2023-11-06 22:24:02,094 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 348 flow [2023-11-06 22:24:02,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=348, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-11-06 22:24:02,095 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 12 predicate places. [2023-11-06 22:24:02,095 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 348 flow [2023-11-06 22:24:02,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 185.2) internal successors, (1852), 10 states have internal predecessors, (1852), 0 states have call successors, (0), 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 22:24:02,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:02,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:24:02,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:02,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:02,308 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:24:02,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:02,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1119688873, now seen corresponding path program 1 times [2023-11-06 22:24:02,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:24:02,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [883393796] [2023-11-06 22:24:02,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:02,309 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 22:24:02,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:24:02,310 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:02,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:02,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:24:02,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:02,416 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 8 treesize of output 7 [2023-11-06 22:24:02,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,430 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 13 treesize of output 1 [2023-11-06 22:24:02,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,438 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 8 treesize of output 1 [2023-11-06 22:24:02,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,447 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 13 treesize of output 1 [2023-11-06 22:24:02,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,459 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 13 treesize of output 1 [2023-11-06 22:24:02,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,479 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 18 treesize of output 1 [2023-11-06 22:24:02,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,523 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:24:02,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,545 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 18 treesize of output 1 [2023-11-06 22:24:02,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,569 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 18 treesize of output 1 [2023-11-06 22:24:02,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,578 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 13 treesize of output 1 [2023-11-06 22:24:02,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,598 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 18 treesize of output 1 [2023-11-06 22:24:02,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,608 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 13 treesize of output 1 [2023-11-06 22:24:02,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,618 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 13 treesize of output 1 [2023-11-06 22:24:02,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,624 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 8 treesize of output 1 [2023-11-06 22:24:02,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,644 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 18 treesize of output 1 [2023-11-06 22:24:02,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,653 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 13 treesize of output 1 [2023-11-06 22:24:02,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,660 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 8 treesize of output 1 [2023-11-06 22:24:02,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,672 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 13 treesize of output 1 [2023-11-06 22:24:02,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,684 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 13 treesize of output 1 [2023-11-06 22:24:02,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,703 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 18 treesize of output 1 [2023-11-06 22:24:02,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,711 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 8 treesize of output 1 [2023-11-06 22:24:02,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,722 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 13 treesize of output 1 [2023-11-06 22:24:02,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,735 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 13 treesize of output 1 [2023-11-06 22:24:02,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:02,742 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 8 treesize of output 1 [2023-11-06 22:24:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:24:02,843 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:24:02,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:24:02,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [883393796] [2023-11-06 22:24:02,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [883393796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:02,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:02,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:24:02,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561196013] [2023-11-06 22:24:02,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:02,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:24:02,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:24:02,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:24:02,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:24:03,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 446 [2023-11-06 22:24:03,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 348 flow. Second operand has 5 states, 5 states have (on average 189.2) internal successors, (946), 5 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:03,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:03,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 446 [2023-11-06 22:24:03,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:04,831 INFO L124 PetriNetUnfolderBase]: 4509/5649 cut-off events. [2023-11-06 22:24:04,831 INFO L125 PetriNetUnfolderBase]: For 1868/1868 co-relation queries the response was YES. [2023-11-06 22:24:04,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14076 conditions, 5649 events. 4509/5649 cut-off events. For 1868/1868 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 23606 event pairs, 1604 based on Foata normal form. 0/2438 useless extension candidates. Maximal degree in co-relation 14056. Up to 4487 conditions per place. [2023-11-06 22:24:04,868 INFO L140 encePairwiseOnDemand]: 438/446 looper letters, 68 selfloop transitions, 20 changer transitions 0/90 dead transitions. [2023-11-06 22:24:04,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 90 transitions, 566 flow [2023-11-06 22:24:04,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:24:04,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:24:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1002 transitions. [2023-11-06 22:24:04,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4493273542600897 [2023-11-06 22:24:04,874 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1002 transitions. [2023-11-06 22:24:04,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1002 transitions. [2023-11-06 22:24:04,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:04,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1002 transitions. [2023-11-06 22:24:04,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.4) internal successors, (1002), 5 states have internal predecessors, (1002), 0 states have call successors, (0), 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 22:24:04,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 446.0) internal successors, (2676), 6 states have internal predecessors, (2676), 0 states have call successors, (0), 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 22:24:04,882 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 446.0) internal successors, (2676), 6 states have internal predecessors, (2676), 0 states have call successors, (0), 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 22:24:04,883 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 348 flow. Second operand 5 states and 1002 transitions. [2023-11-06 22:24:04,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 90 transitions, 566 flow [2023-11-06 22:24:04,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 90 transitions, 560 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:24:04,906 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 388 flow [2023-11-06 22:24:04,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=388, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2023-11-06 22:24:04,907 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 14 predicate places. [2023-11-06 22:24:04,908 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 388 flow [2023-11-06 22:24:04,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 189.2) internal successors, (946), 5 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:04,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:04,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:04,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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)] Ended with exit code 0 [2023-11-06 22:24:05,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:05,123 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:24:05,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:05,123 INFO L85 PathProgramCache]: Analyzing trace with hash -350614436, now seen corresponding path program 1 times [2023-11-06 22:24:05,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:24:05,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000123087] [2023-11-06 22:24:05,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:05,124 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 22:24:05,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:24:05,125 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:05,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:05,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:24:05,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:24:05,237 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:24:05,237 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:24:05,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000123087] [2023-11-06 22:24:05,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000123087] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:05,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:05,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:24:05,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416070654] [2023-11-06 22:24:05,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:05,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:24:05,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:24:05,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:24:05,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:24:05,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 446 [2023-11-06 22:24:05,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 388 flow. Second operand has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 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 22:24:05,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:05,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 446 [2023-11-06 22:24:05,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:06,223 INFO L124 PetriNetUnfolderBase]: 4741/5964 cut-off events. [2023-11-06 22:24:06,223 INFO L125 PetriNetUnfolderBase]: For 1878/2310 co-relation queries the response was YES. [2023-11-06 22:24:06,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14919 conditions, 5964 events. 4741/5964 cut-off events. For 1878/2310 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 26169 event pairs, 719 based on Foata normal form. 432/3072 useless extension candidates. Maximal degree in co-relation 14898. Up to 4237 conditions per place. [2023-11-06 22:24:06,254 INFO L140 encePairwiseOnDemand]: 442/446 looper letters, 78 selfloop transitions, 16 changer transitions 0/97 dead transitions. [2023-11-06 22:24:06,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 97 transitions, 628 flow [2023-11-06 22:24:06,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:24:06,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:24:06,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 665 transitions. [2023-11-06 22:24:06,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4970104633781764 [2023-11-06 22:24:06,258 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 665 transitions. [2023-11-06 22:24:06,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 665 transitions. [2023-11-06 22:24:06,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:06,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 665 transitions. [2023-11-06 22:24:06,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 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 22:24:06,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:24:06,263 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:24:06,263 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 388 flow. Second operand 3 states and 665 transitions. [2023-11-06 22:24:06,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 97 transitions, 628 flow [2023-11-06 22:24:06,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 97 transitions, 590 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:24:06,269 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 373 flow [2023-11-06 22:24:06,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=373, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2023-11-06 22:24:06,270 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 12 predicate places. [2023-11-06 22:24:06,270 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 373 flow [2023-11-06 22:24:06,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 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 22:24:06,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:06,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:06,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:06,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:06,479 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:24:06,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:06,479 INFO L85 PathProgramCache]: Analyzing trace with hash -350368491, now seen corresponding path program 1 times [2023-11-06 22:24:06,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:24:06,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806224709] [2023-11-06 22:24:06,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:06,479 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 22:24:06,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:24:06,482 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:06,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:06,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:24:06,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:06,668 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 22:24:06,668 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 16 treesize of output 17 [2023-11-06 22:24:06,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:06,706 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:24:06,706 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 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 22:24:06,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:06,736 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:24:06,736 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 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 22:24:06,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:06,802 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:24:06,802 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2023-11-06 22:24:06,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:06,847 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:24:06,847 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 16 treesize of output 13 [2023-11-06 22:24:06,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:06,901 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:24:06,902 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 16 treesize of output 13 [2023-11-06 22:24:06,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:06,966 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:24:06,967 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 16 treesize of output 13 [2023-11-06 22:24:06,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:07,009 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:24:07,009 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 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 22:24:07,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:07,049 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:24:07,049 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 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 22:24:07,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:07,108 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:24:07,109 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 16 treesize of output 13 [2023-11-06 22:24:07,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:07,150 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:24:07,151 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 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 22:24:07,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:07,193 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:24:07,193 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 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 22:24:07,826 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 22:24:07,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:24:08,118 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 22:24:08,118 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:24:08,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806224709] [2023-11-06 22:24:08,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806224709] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:24:08,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:24:08,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-06 22:24:08,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253900524] [2023-11-06 22:24:08,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:24:08,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:24:08,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:24:08,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:24:08,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:24:10,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 446 [2023-11-06 22:24:10,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 373 flow. Second operand has 8 states, 8 states have (on average 184.75) internal successors, (1478), 8 states have internal predecessors, (1478), 0 states have call successors, (0), 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 22:24:10,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:10,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 446 [2023-11-06 22:24:10,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:11,634 INFO L124 PetriNetUnfolderBase]: 4286/5445 cut-off events. [2023-11-06 22:24:11,634 INFO L125 PetriNetUnfolderBase]: For 2765/3173 co-relation queries the response was YES. [2023-11-06 22:24:11,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13500 conditions, 5445 events. 4286/5445 cut-off events. For 2765/3173 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 23079 event pairs, 2096 based on Foata normal form. 408/2863 useless extension candidates. Maximal degree in co-relation 13480. Up to 5391 conditions per place. [2023-11-06 22:24:11,661 INFO L140 encePairwiseOnDemand]: 441/446 looper letters, 61 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2023-11-06 22:24:11,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 68 transitions, 499 flow [2023-11-06 22:24:11,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:24:11,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:24:11,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 956 transitions. [2023-11-06 22:24:11,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42869955156950673 [2023-11-06 22:24:11,665 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 956 transitions. [2023-11-06 22:24:11,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 956 transitions. [2023-11-06 22:24:11,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:11,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 956 transitions. [2023-11-06 22:24:11,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 191.2) internal successors, (956), 5 states have internal predecessors, (956), 0 states have call successors, (0), 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 22:24:11,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 446.0) internal successors, (2676), 6 states have internal predecessors, (2676), 0 states have call successors, (0), 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 22:24:11,670 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 446.0) internal successors, (2676), 6 states have internal predecessors, (2676), 0 states have call successors, (0), 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 22:24:11,670 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 373 flow. Second operand 5 states and 956 transitions. [2023-11-06 22:24:11,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 68 transitions, 499 flow [2023-11-06 22:24:11,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 68 transitions, 467 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:24:11,674 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 345 flow [2023-11-06 22:24:11,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=345, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2023-11-06 22:24:11,675 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 12 predicate places. [2023-11-06 22:24:11,675 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 345 flow [2023-11-06 22:24:11,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 184.75) internal successors, (1478), 8 states have internal predecessors, (1478), 0 states have call successors, (0), 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 22:24:11,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:11,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:11,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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)] Forceful destruction successful, exit code 0 [2023-11-06 22:24:11,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:11,885 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:24:11,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:11,886 INFO L85 PathProgramCache]: Analyzing trace with hash -350368490, now seen corresponding path program 1 times [2023-11-06 22:24:11,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:24:11,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642849127] [2023-11-06 22:24:11,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:11,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:24:11,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:24:11,887 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:11,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:12,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:24:12,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:12,021 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:24:12,021 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 22:24:12,047 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:24:12,048 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 22:24:12,065 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:24:12,065 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 22:24:12,084 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:24:12,084 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 22:24:12,101 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:24:12,101 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 22:24:12,123 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:24:12,123 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 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 22:24:12,141 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:24:12,141 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 22:24:12,177 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:24:12,178 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 22:24:12,195 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:24:12,196 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 22:24:12,226 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:24:12,226 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-06 22:24:12,257 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:24:12,257 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 22:24:12,284 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:24:12,285 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 22:24:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:24:12,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:24:12,395 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:24:12,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642849127] [2023-11-06 22:24:12,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642849127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:12,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:12,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:24:12,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333507275] [2023-11-06 22:24:12,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:12,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:24:12,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:24:12,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:24:12,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:24:12,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 446 [2023-11-06 22:24:12,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 345 flow. Second operand has 3 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:12,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:12,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 446 [2023-11-06 22:24:12,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:13,362 INFO L124 PetriNetUnfolderBase]: 3614/4533 cut-off events. [2023-11-06 22:24:13,363 INFO L125 PetriNetUnfolderBase]: For 2292/2676 co-relation queries the response was YES. [2023-11-06 22:24:13,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11423 conditions, 4533 events. 3614/4533 cut-off events. For 2292/2676 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 18165 event pairs, 1684 based on Foata normal form. 384/2496 useless extension candidates. Maximal degree in co-relation 11402. Up to 4487 conditions per place. [2023-11-06 22:24:13,388 INFO L140 encePairwiseOnDemand]: 443/446 looper letters, 62 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2023-11-06 22:24:13,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 66 transitions, 467 flow [2023-11-06 22:24:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:24:13,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:24:13,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 609 transitions. [2023-11-06 22:24:13,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551569506726457 [2023-11-06 22:24:13,391 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 609 transitions. [2023-11-06 22:24:13,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 609 transitions. [2023-11-06 22:24:13,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:13,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 609 transitions. [2023-11-06 22:24:13,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 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 22:24:13,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:24:13,396 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:24:13,396 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 345 flow. Second operand 3 states and 609 transitions. [2023-11-06 22:24:13,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 66 transitions, 467 flow [2023-11-06 22:24:13,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 461 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:24:13,399 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 337 flow [2023-11-06 22:24:13,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=337, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2023-11-06 22:24:13,400 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2023-11-06 22:24:13,400 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 337 flow [2023-11-06 22:24:13,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:24:13,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:13,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:13,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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)] Ended with exit code 0 [2023-11-06 22:24:13,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:13,601 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:24:13,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:13,602 INFO L85 PathProgramCache]: Analyzing trace with hash 2015810472, now seen corresponding path program 1 times [2023-11-06 22:24:13,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:24:13,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544270575] [2023-11-06 22:24:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:13,603 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 22:24:13,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:24:13,604 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:13,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:13,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:24:13,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:13,755 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 13 treesize of output 7 [2023-11-06 22:24:13,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:13,770 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 8 treesize of output 1 [2023-11-06 22:24:13,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:13,792 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 18 treesize of output 1 [2023-11-06 22:24:13,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:13,803 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 13 treesize of output 1 [2023-11-06 22:24:13,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:13,811 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 8 treesize of output 1 [2023-11-06 22:24:13,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:13,822 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 13 treesize of output 1 [2023-11-06 22:24:13,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:13,831 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 8 treesize of output 1 [2023-11-06 22:24:13,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:13,842 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 13 treesize of output 1 [2023-11-06 22:24:13,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:13,850 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 8 treesize of output 1 [2023-11-06 22:24:13,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:13,861 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 13 treesize of output 1 [2023-11-06 22:24:13,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:13,873 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 13 treesize of output 1 [2023-11-06 22:24:13,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:13,896 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 18 treesize of output 1 [2023-11-06 22:24:13,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:13,910 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 13 treesize of output 1 [2023-11-06 22:24:13,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:13,918 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 8 treesize of output 1 [2023-11-06 22:24:13,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:13,926 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 8 treesize of output 1 [2023-11-06 22:24:13,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:13,937 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 13 treesize of output 1 [2023-11-06 22:24:13,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:13,962 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 18 treesize of output 1 [2023-11-06 22:24:13,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:13,975 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 13 treesize of output 1 [2023-11-06 22:24:14,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:14,003 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 18 treesize of output 1 [2023-11-06 22:24:14,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:14,016 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 13 treesize of output 1 [2023-11-06 22:24:14,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:14,042 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 18 treesize of output 1 [2023-11-06 22:24:14,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:14,076 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:24:14,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:14,095 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 13 treesize of output 1 [2023-11-06 22:24:14,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:14,119 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 18 treesize of output 1 [2023-11-06 22:24:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:24:14,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:24:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:24:15,108 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:24:15,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544270575] [2023-11-06 22:24:15,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544270575] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:24:15,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:24:15,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:24:15,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728039004] [2023-11-06 22:24:15,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:24:15,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:24:15,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:24:15,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:24:15,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:24:24,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 446 [2023-11-06 22:24:24,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 337 flow. Second operand has 11 states, 11 states have (on average 181.45454545454547) internal successors, (1996), 11 states have internal predecessors, (1996), 0 states have call successors, (0), 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 22:24:24,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:24,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 446 [2023-11-06 22:24:24,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:27,950 INFO L124 PetriNetUnfolderBase]: 5646/7157 cut-off events. [2023-11-06 22:24:27,950 INFO L125 PetriNetUnfolderBase]: For 3939/3939 co-relation queries the response was YES. [2023-11-06 22:24:27,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17494 conditions, 7157 events. 5646/7157 cut-off events. For 3939/3939 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 30817 event pairs, 2070 based on Foata normal form. 104/3389 useless extension candidates. Maximal degree in co-relation 17473. Up to 4379 conditions per place. [2023-11-06 22:24:27,999 INFO L140 encePairwiseOnDemand]: 438/446 looper letters, 113 selfloop transitions, 9 changer transitions 0/124 dead transitions. [2023-11-06 22:24:28,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 124 transitions, 719 flow [2023-11-06 22:24:28,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:24:28,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:24:28,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1537 transitions. [2023-11-06 22:24:28,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43077354260089684 [2023-11-06 22:24:28,007 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1537 transitions. [2023-11-06 22:24:28,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1537 transitions. [2023-11-06 22:24:28,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:28,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1537 transitions. [2023-11-06 22:24:28,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 192.125) internal successors, (1537), 8 states have internal predecessors, (1537), 0 states have call successors, (0), 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 22:24:28,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 446.0) internal successors, (4014), 9 states have internal predecessors, (4014), 0 states have call successors, (0), 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 22:24:28,018 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 446.0) internal successors, (4014), 9 states have internal predecessors, (4014), 0 states have call successors, (0), 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 22:24:28,018 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 337 flow. Second operand 8 states and 1537 transitions. [2023-11-06 22:24:28,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 124 transitions, 719 flow [2023-11-06 22:24:28,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 124 transitions, 718 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:24:28,023 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 379 flow [2023-11-06 22:24:28,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=379, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2023-11-06 22:24:28,024 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 17 predicate places. [2023-11-06 22:24:28,025 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 379 flow [2023-11-06 22:24:28,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 181.45454545454547) internal successors, (1996), 11 states have internal predecessors, (1996), 0 states have call successors, (0), 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 22:24:28,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:28,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:28,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:28,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:28,227 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:24:28,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:28,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2023471916, now seen corresponding path program 1 times [2023-11-06 22:24:28,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:24:28,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271657903] [2023-11-06 22:24:28,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:28,228 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 22:24:28,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:24:28,229 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:28,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:28,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:24:28,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:28,368 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 8 treesize of output 7 [2023-11-06 22:24:28,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,381 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 13 treesize of output 1 [2023-11-06 22:24:28,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,414 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 18 treesize of output 1 [2023-11-06 22:24:28,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,427 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 13 treesize of output 1 [2023-11-06 22:24:28,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,436 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 8 treesize of output 1 [2023-11-06 22:24:28,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,448 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 13 treesize of output 1 [2023-11-06 22:24:28,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,458 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 8 treesize of output 1 [2023-11-06 22:24:28,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,470 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 13 treesize of output 1 [2023-11-06 22:24:28,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,496 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 18 treesize of output 1 [2023-11-06 22:24:28,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,508 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 13 treesize of output 1 [2023-11-06 22:24:28,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,521 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 13 treesize of output 1 [2023-11-06 22:24:28,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,529 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 8 treesize of output 1 [2023-11-06 22:24:28,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,544 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 13 treesize of output 1 [2023-11-06 22:24:28,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,553 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 8 treesize of output 1 [2023-11-06 22:24:28,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,567 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 13 treesize of output 1 [2023-11-06 22:24:28,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,590 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 18 treesize of output 1 [2023-11-06 22:24:28,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,600 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 8 treesize of output 1 [2023-11-06 22:24:28,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,612 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 13 treesize of output 1 [2023-11-06 22:24:28,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,640 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 18 treesize of output 1 [2023-11-06 22:24:28,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,656 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 13 treesize of output 1 [2023-11-06 22:24:28,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,696 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:24:28,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,719 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 18 treesize of output 1 [2023-11-06 22:24:28,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,746 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 18 treesize of output 1 [2023-11-06 22:24:28,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:28,757 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 13 treesize of output 1 [2023-11-06 22:24:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:24:28,974 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:24:28,975 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:24:28,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271657903] [2023-11-06 22:24:28,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271657903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:28,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:28,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:24:28,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974777764] [2023-11-06 22:24:28,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:28,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:24:28,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:24:28,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:24:28,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:24:30,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 446 [2023-11-06 22:24:30,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 379 flow. Second operand has 5 states, 5 states have (on average 187.6) internal successors, (938), 5 states have internal predecessors, (938), 0 states have call successors, (0), 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 22:24:30,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:30,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 446 [2023-11-06 22:24:30,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:31,674 INFO L124 PetriNetUnfolderBase]: 6181/7900 cut-off events. [2023-11-06 22:24:31,674 INFO L125 PetriNetUnfolderBase]: For 6490/7691 co-relation queries the response was YES. [2023-11-06 22:24:31,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20500 conditions, 7900 events. 6181/7900 cut-off events. For 6490/7691 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 35808 event pairs, 1861 based on Foata normal form. 1201/5416 useless extension candidates. Maximal degree in co-relation 20476. Up to 6053 conditions per place. [2023-11-06 22:24:31,738 INFO L140 encePairwiseOnDemand]: 437/446 looper letters, 72 selfloop transitions, 20 changer transitions 0/95 dead transitions. [2023-11-06 22:24:31,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 95 transitions, 678 flow [2023-11-06 22:24:31,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:24:31,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:24:31,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 987 transitions. [2023-11-06 22:24:31,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426008968609865 [2023-11-06 22:24:31,743 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 987 transitions. [2023-11-06 22:24:31,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 987 transitions. [2023-11-06 22:24:31,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:31,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 987 transitions. [2023-11-06 22:24:31,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 197.4) internal successors, (987), 5 states have internal predecessors, (987), 0 states have call successors, (0), 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 22:24:31,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 446.0) internal successors, (2676), 6 states have internal predecessors, (2676), 0 states have call successors, (0), 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 22:24:31,749 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 446.0) internal successors, (2676), 6 states have internal predecessors, (2676), 0 states have call successors, (0), 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 22:24:31,750 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 379 flow. Second operand 5 states and 987 transitions. [2023-11-06 22:24:31,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 95 transitions, 678 flow [2023-11-06 22:24:31,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 95 transitions, 673 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:24:31,758 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 434 flow [2023-11-06 22:24:31,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=434, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2023-11-06 22:24:31,759 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 20 predicate places. [2023-11-06 22:24:31,759 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 434 flow [2023-11-06 22:24:31,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 187.6) internal successors, (938), 5 states have internal predecessors, (938), 0 states have call successors, (0), 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 22:24:31,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:31,760 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 1, 1] [2023-11-06 22:24:31,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:31,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:31,975 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:24:31,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:31,975 INFO L85 PathProgramCache]: Analyzing trace with hash 194938361, now seen corresponding path program 2 times [2023-11-06 22:24:31,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:24:31,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139894942] [2023-11-06 22:24:31,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:24:31,976 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 22:24:31,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:24:31,977 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:31,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:32,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:24:32,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:24:32,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:24:32,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:32,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:32,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:32,114 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 13 [2023-11-06 22:24:32,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:32,131 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-06 22:24:32,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:32,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:32,197 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 22:24:32,197 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2023-11-06 22:24:32,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:32,218 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-06 22:24:32,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:32,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:32,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:32,266 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 13 [2023-11-06 22:24:32,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:32,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:32,282 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-06 22:24:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-06 22:24:32,664 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:24:32,664 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:24:32,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139894942] [2023-11-06 22:24:32,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139894942] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:32,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:32,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:24:32,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536520409] [2023-11-06 22:24:32,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:32,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:24:32,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:24:32,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:24:32,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:24:34,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:24:36,116 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] [2023-11-06 22:24:36,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 446 [2023-11-06 22:24:36,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 434 flow. Second operand has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 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 22:24:36,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:36,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 446 [2023-11-06 22:24:36,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:37,603 INFO L124 PetriNetUnfolderBase]: 5421/6938 cut-off events. [2023-11-06 22:24:37,603 INFO L125 PetriNetUnfolderBase]: For 6168/7396 co-relation queries the response was YES. [2023-11-06 22:24:37,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20190 conditions, 6938 events. 5421/6938 cut-off events. For 6168/7396 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 31130 event pairs, 2896 based on Foata normal form. 1233/5186 useless extension candidates. Maximal degree in co-relation 20164. Up to 6906 conditions per place. [2023-11-06 22:24:37,644 INFO L140 encePairwiseOnDemand]: 444/446 looper letters, 61 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2023-11-06 22:24:37,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 66 transitions, 500 flow [2023-11-06 22:24:37,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:24:37,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:24:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 613 transitions. [2023-11-06 22:24:37,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4581464872944694 [2023-11-06 22:24:37,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 613 transitions. [2023-11-06 22:24:37,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 613 transitions. [2023-11-06 22:24:37,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:37,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 613 transitions. [2023-11-06 22:24:37,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 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 22:24:37,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:24:37,651 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:24:37,651 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 434 flow. Second operand 3 states and 613 transitions. [2023-11-06 22:24:37,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 66 transitions, 500 flow [2023-11-06 22:24:37,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 66 transitions, 462 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-06 22:24:37,655 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 340 flow [2023-11-06 22:24:37,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=340, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2023-11-06 22:24:37,656 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 16 predicate places. [2023-11-06 22:24:37,656 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 340 flow [2023-11-06 22:24:37,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 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 22:24:37,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:37,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:37,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:37,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:37,857 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:24:37,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:37,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1696650368, now seen corresponding path program 1 times [2023-11-06 22:24:37,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:24:37,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646236247] [2023-11-06 22:24:37,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:37,858 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 22:24:37,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:24:37,859 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:37,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:38,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:24:38,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:24:38,069 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:24:38,069 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:24:38,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646236247] [2023-11-06 22:24:38,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646236247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:38,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:38,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:24:38,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667342888] [2023-11-06 22:24:38,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:38,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:24:38,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:24:38,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:24:38,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:24:38,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 446 [2023-11-06 22:24:38,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 340 flow. Second operand has 4 states, 4 states have (on average 195.25) internal successors, (781), 4 states have internal predecessors, (781), 0 states have call successors, (0), 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 22:24:38,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:38,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 446 [2023-11-06 22:24:38,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:39,036 INFO L124 PetriNetUnfolderBase]: 3719/4851 cut-off events. [2023-11-06 22:24:39,036 INFO L125 PetriNetUnfolderBase]: For 4158/5013 co-relation queries the response was YES. [2023-11-06 22:24:39,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13773 conditions, 4851 events. 3719/4851 cut-off events. For 4158/5013 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 21556 event pairs, 1956 based on Foata normal form. 855/3875 useless extension candidates. Maximal degree in co-relation 13749. Up to 4813 conditions per place. [2023-11-06 22:24:39,072 INFO L140 encePairwiseOnDemand]: 444/446 looper letters, 60 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-11-06 22:24:39,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 65 transitions, 460 flow [2023-11-06 22:24:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:24:39,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:24:39,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-11-06 22:24:39,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45739910313901344 [2023-11-06 22:24:39,075 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-11-06 22:24:39,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-11-06 22:24:39,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:39,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-11-06 22:24:39,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 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 22:24:39,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:24:39,079 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:24:39,080 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 340 flow. Second operand 3 states and 612 transitions. [2023-11-06 22:24:39,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 65 transitions, 460 flow [2023-11-06 22:24:39,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 65 transitions, 459 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:24:39,087 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 339 flow [2023-11-06 22:24:39,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=339, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2023-11-06 22:24:39,088 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 16 predicate places. [2023-11-06 22:24:39,088 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 339 flow [2023-11-06 22:24:39,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 195.25) internal successors, (781), 4 states have internal predecessors, (781), 0 states have call successors, (0), 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 22:24:39,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:39,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:39,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:39,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:39,303 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:24:39,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:39,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1696878084, now seen corresponding path program 1 times [2023-11-06 22:24:39,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:24:39,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586993861] [2023-11-06 22:24:39,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:39,304 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 22:24:39,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:24:39,304 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:39,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:39,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:24:39,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:24:39,429 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:24:39,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:24:39,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586993861] [2023-11-06 22:24:39,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586993861] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:39,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:39,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:24:39,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958494184] [2023-11-06 22:24:39,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:39,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:24:39,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:24:39,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:24:39,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:24:39,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 446 [2023-11-06 22:24:39,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 339 flow. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 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 22:24:39,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:39,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 446 [2023-11-06 22:24:39,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:40,390 INFO L124 PetriNetUnfolderBase]: 4032/5340 cut-off events. [2023-11-06 22:24:40,390 INFO L125 PetriNetUnfolderBase]: For 5342/6323 co-relation queries the response was YES. [2023-11-06 22:24:40,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15085 conditions, 5340 events. 4032/5340 cut-off events. For 5342/6323 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 25459 event pairs, 790 based on Foata normal form. 981/4404 useless extension candidates. Maximal degree in co-relation 15060. Up to 3553 conditions per place. [2023-11-06 22:24:40,431 INFO L140 encePairwiseOnDemand]: 443/446 looper letters, 76 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2023-11-06 22:24:40,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 91 transitions, 626 flow [2023-11-06 22:24:40,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:24:40,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:24:40,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 652 transitions. [2023-11-06 22:24:40,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4872944693572496 [2023-11-06 22:24:40,434 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 652 transitions. [2023-11-06 22:24:40,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 652 transitions. [2023-11-06 22:24:40,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:40,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 652 transitions. [2023-11-06 22:24:40,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 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 22:24:40,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:24:40,438 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:24:40,438 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 339 flow. Second operand 3 states and 652 transitions. [2023-11-06 22:24:40,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 91 transitions, 626 flow [2023-11-06 22:24:40,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 625 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:24:40,444 INFO L231 Difference]: Finished difference. Result has 76 places, 64 transitions, 356 flow [2023-11-06 22:24:40,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=356, PETRI_PLACES=76, PETRI_TRANSITIONS=64} [2023-11-06 22:24:40,445 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 17 predicate places. [2023-11-06 22:24:40,445 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 64 transitions, 356 flow [2023-11-06 22:24:40,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 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 22:24:40,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:40,446 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:40,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:40,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:40,658 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:24:40,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:40,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1511723811, now seen corresponding path program 2 times [2023-11-06 22:24:40,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:24:40,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487436618] [2023-11-06 22:24:40,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:24:40,659 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 22:24:40,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:24:40,660 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:40,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:40,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:24:40,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:24:40,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:24:40,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:40,819 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 13 treesize of output 7 [2023-11-06 22:24:40,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:40,844 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 18 treesize of output 1 [2023-11-06 22:24:40,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:40,868 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 18 treesize of output 1 [2023-11-06 22:24:40,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:40,879 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 13 treesize of output 1 [2023-11-06 22:24:40,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:40,902 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 18 treesize of output 1 [2023-11-06 22:24:40,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:40,941 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:24:40,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:40,955 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 13 treesize of output 1 [2023-11-06 22:24:40,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:40,963 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 8 treesize of output 1 [2023-11-06 22:24:40,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:40,988 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 18 treesize of output 1 [2023-11-06 22:24:40,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:40,998 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 13 treesize of output 1 [2023-11-06 22:24:41,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:41,010 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 13 treesize of output 1 [2023-11-06 22:24:41,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:41,018 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 8 treesize of output 1 [2023-11-06 22:24:41,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:41,042 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 18 treesize of output 1 [2023-11-06 22:24:41,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:41,054 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 13 treesize of output 1 [2023-11-06 22:24:41,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:41,062 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 8 treesize of output 1 [2023-11-06 22:24:41,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:41,072 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 13 treesize of output 1 [2023-11-06 22:24:41,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:41,083 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 13 treesize of output 1 [2023-11-06 22:24:41,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:41,090 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 8 treesize of output 1 [2023-11-06 22:24:41,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:41,101 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 13 treesize of output 1 [2023-11-06 22:24:41,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:41,108 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 8 treesize of output 1 [2023-11-06 22:24:41,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:41,116 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 8 treesize of output 1 [2023-11-06 22:24:41,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:41,126 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 13 treesize of output 1 [2023-11-06 22:24:41,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:41,140 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 13 treesize of output 1 [2023-11-06 22:24:41,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:41,160 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 18 treesize of output 1 [2023-11-06 22:24:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:24:41,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:24:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:24:42,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:24:42,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487436618] [2023-11-06 22:24:42,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487436618] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:24:42,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:24:42,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:24:42,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610251418] [2023-11-06 22:24:42,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:24:42,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:24:42,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:24:42,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:24:42,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:24:49,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 446 [2023-11-06 22:24:49,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 64 transitions, 356 flow. Second operand has 12 states, 12 states have (on average 184.33333333333334) internal successors, (2212), 12 states have internal predecessors, (2212), 0 states have call successors, (0), 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 22:24:49,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:49,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 446 [2023-11-06 22:24:49,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:55,312 INFO L124 PetriNetUnfolderBase]: 8959/11639 cut-off events. [2023-11-06 22:24:55,312 INFO L125 PetriNetUnfolderBase]: For 9091/9400 co-relation queries the response was YES. [2023-11-06 22:24:55,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32861 conditions, 11639 events. 8959/11639 cut-off events. For 9091/9400 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 57816 event pairs, 724 based on Foata normal form. 799/8191 useless extension candidates. Maximal degree in co-relation 32836. Up to 3758 conditions per place. [2023-11-06 22:24:55,403 INFO L140 encePairwiseOnDemand]: 438/446 looper letters, 176 selfloop transitions, 32 changer transitions 0/210 dead transitions. [2023-11-06 22:24:55,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 210 transitions, 1255 flow [2023-11-06 22:24:55,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:24:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:24:55,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2177 transitions. [2023-11-06 22:24:55,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44374235629841013 [2023-11-06 22:24:55,411 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2177 transitions. [2023-11-06 22:24:55,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2177 transitions. [2023-11-06 22:24:55,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:55,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2177 transitions. [2023-11-06 22:24:55,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 197.9090909090909) internal successors, (2177), 11 states have internal predecessors, (2177), 0 states have call successors, (0), 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 22:24:55,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 446.0) internal successors, (5352), 12 states have internal predecessors, (5352), 0 states have call successors, (0), 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 22:24:55,422 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 446.0) internal successors, (5352), 12 states have internal predecessors, (5352), 0 states have call successors, (0), 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 22:24:55,422 INFO L175 Difference]: Start difference. First operand has 76 places, 64 transitions, 356 flow. Second operand 11 states and 2177 transitions. [2023-11-06 22:24:55,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 210 transitions, 1255 flow [2023-11-06 22:24:55,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 210 transitions, 1219 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:24:55,433 INFO L231 Difference]: Finished difference. Result has 85 places, 78 transitions, 483 flow [2023-11-06 22:24:55,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=483, PETRI_PLACES=85, PETRI_TRANSITIONS=78} [2023-11-06 22:24:55,434 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 26 predicate places. [2023-11-06 22:24:55,434 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 78 transitions, 483 flow [2023-11-06 22:24:55,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 184.33333333333334) internal successors, (2212), 12 states have internal predecessors, (2212), 0 states have call successors, (0), 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 22:24:55,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:55,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:55,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:55,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:55,647 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:24:55,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:55,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1063679416, now seen corresponding path program 1 times [2023-11-06 22:24:55,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:24:55,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774357299] [2023-11-06 22:24:55,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:55,648 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:24:55,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:24:55,649 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:55,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:24:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:55,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:24:55,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:55,784 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 13 treesize of output 7 [2023-11-06 22:24:55,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:55,795 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 8 treesize of output 1 [2023-11-06 22:24:55,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:55,807 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 13 treesize of output 1 [2023-11-06 22:24:55,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:55,826 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 18 treesize of output 1 [2023-11-06 22:24:55,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:55,837 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 13 treesize of output 1 [2023-11-06 22:24:55,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:55,864 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 8 treesize of output 1 [2023-11-06 22:24:55,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:55,885 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 18 treesize of output 1 [2023-11-06 22:24:55,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:55,896 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 13 treesize of output 1 [2023-11-06 22:24:55,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:55,907 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 13 treesize of output 1 [2023-11-06 22:24:55,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:55,914 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 8 treesize of output 1 [2023-11-06 22:24:55,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:55,921 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 8 treesize of output 1 [2023-11-06 22:24:55,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:55,942 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 13 treesize of output 1 [2023-11-06 22:24:55,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:55,955 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 13 treesize of output 1 [2023-11-06 22:24:55,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:55,975 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 18 treesize of output 1 [2023-11-06 22:24:55,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:55,986 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 13 treesize of output 1 [2023-11-06 22:24:56,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:56,007 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 18 treesize of output 1 [2023-11-06 22:24:56,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:56,031 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 18 treesize of output 1 [2023-11-06 22:24:56,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:56,061 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:24:56,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:56,074 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 13 treesize of output 1 [2023-11-06 22:24:56,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:56,095 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 18 treesize of output 1 [2023-11-06 22:24:56,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:56,103 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 8 treesize of output 1 [2023-11-06 22:24:56,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:56,113 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 13 treesize of output 1 [2023-11-06 22:24:56,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:56,123 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 13 treesize of output 1 [2023-11-06 22:24:56,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:24:56,130 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 8 treesize of output 1 [2023-11-06 22:24:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:24:56,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:24:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:24:57,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:24:57,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774357299] [2023-11-06 22:24:57,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774357299] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:24:57,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:24:57,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:24:57,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291659709] [2023-11-06 22:24:57,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:24:57,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:24:57,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:24:57,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:24:57,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:25:03,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 446 [2023-11-06 22:25:03,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 78 transitions, 483 flow. Second operand has 11 states, 11 states have (on average 181.8181818181818) internal successors, (2000), 11 states have internal predecessors, (2000), 0 states have call successors, (0), 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 22:25:03,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:03,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 446 [2023-11-06 22:25:03,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:07,374 INFO L124 PetriNetUnfolderBase]: 7940/10204 cut-off events. [2023-11-06 22:25:07,374 INFO L125 PetriNetUnfolderBase]: For 10973/11766 co-relation queries the response was YES. [2023-11-06 22:25:07,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31496 conditions, 10204 events. 7940/10204 cut-off events. For 10973/11766 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 45619 event pairs, 3599 based on Foata normal form. 839/7467 useless extension candidates. Maximal degree in co-relation 31469. Up to 8420 conditions per place. [2023-11-06 22:25:07,460 INFO L140 encePairwiseOnDemand]: 438/446 looper letters, 133 selfloop transitions, 8 changer transitions 0/144 dead transitions. [2023-11-06 22:25:07,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 144 transitions, 1073 flow [2023-11-06 22:25:07,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:25:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:25:07,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1524 transitions. [2023-11-06 22:25:07,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42713004484304934 [2023-11-06 22:25:07,464 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1524 transitions. [2023-11-06 22:25:07,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1524 transitions. [2023-11-06 22:25:07,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:07,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1524 transitions. [2023-11-06 22:25:07,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 190.5) internal successors, (1524), 8 states have internal predecessors, (1524), 0 states have call successors, (0), 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 22:25:07,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 446.0) internal successors, (4014), 9 states have internal predecessors, (4014), 0 states have call successors, (0), 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 22:25:07,471 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 446.0) internal successors, (4014), 9 states have internal predecessors, (4014), 0 states have call successors, (0), 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 22:25:07,471 INFO L175 Difference]: Start difference. First operand has 85 places, 78 transitions, 483 flow. Second operand 8 states and 1524 transitions. [2023-11-06 22:25:07,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 144 transitions, 1073 flow [2023-11-06 22:25:07,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 144 transitions, 1029 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-06 22:25:07,482 INFO L231 Difference]: Finished difference. Result has 90 places, 80 transitions, 490 flow [2023-11-06 22:25:07,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=490, PETRI_PLACES=90, PETRI_TRANSITIONS=80} [2023-11-06 22:25:07,483 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 31 predicate places. [2023-11-06 22:25:07,483 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 80 transitions, 490 flow [2023-11-06 22:25:07,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 181.8181818181818) internal successors, (2000), 11 states have internal predecessors, (2000), 0 states have call successors, (0), 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 22:25:07,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:07,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:07,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:07,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:07,687 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:25:07,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:07,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1056558245, now seen corresponding path program 1 times [2023-11-06 22:25:07,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:25:07,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801893382] [2023-11-06 22:25:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:07,688 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 22:25:07,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:25:07,689 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:07,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:07,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:25:07,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:07,943 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 22:25:07,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:25:08,168 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 22:25:08,169 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:25:08,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801893382] [2023-11-06 22:25:08,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801893382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:25:08,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:25:08,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:25:08,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638357208] [2023-11-06 22:25:08,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:25:08,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:25:08,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:25:08,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:25:08,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:25:08,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 446 [2023-11-06 22:25:08,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 80 transitions, 490 flow. Second operand has 10 states, 10 states have (on average 187.0) internal successors, (1870), 10 states have internal predecessors, (1870), 0 states have call successors, (0), 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 22:25:08,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:08,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 446 [2023-11-06 22:25:08,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:10,907 INFO L124 PetriNetUnfolderBase]: 6043/7967 cut-off events. [2023-11-06 22:25:10,907 INFO L125 PetriNetUnfolderBase]: For 8802/9969 co-relation queries the response was YES. [2023-11-06 22:25:10,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25951 conditions, 7967 events. 6043/7967 cut-off events. For 8802/9969 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 35445 event pairs, 3657 based on Foata normal form. 1167/7134 useless extension candidates. Maximal degree in co-relation 25923. Up to 7714 conditions per place. [2023-11-06 22:25:10,962 INFO L140 encePairwiseOnDemand]: 437/446 looper letters, 90 selfloop transitions, 7 changer transitions 4/105 dead transitions. [2023-11-06 22:25:10,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 105 transitions, 772 flow [2023-11-06 22:25:10,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:25:10,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:25:10,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1361 transitions. [2023-11-06 22:25:10,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43593850096092246 [2023-11-06 22:25:10,965 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1361 transitions. [2023-11-06 22:25:10,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1361 transitions. [2023-11-06 22:25:10,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:10,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1361 transitions. [2023-11-06 22:25:10,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 194.42857142857142) internal successors, (1361), 7 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 22:25:10,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 446.0) internal successors, (3568), 8 states have internal predecessors, (3568), 0 states have call successors, (0), 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 22:25:10,970 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 446.0) internal successors, (3568), 8 states have internal predecessors, (3568), 0 states have call successors, (0), 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 22:25:10,970 INFO L175 Difference]: Start difference. First operand has 90 places, 80 transitions, 490 flow. Second operand 7 states and 1361 transitions. [2023-11-06 22:25:10,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 105 transitions, 772 flow [2023-11-06 22:25:10,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 105 transitions, 767 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:25:10,981 INFO L231 Difference]: Finished difference. Result has 96 places, 82 transitions, 518 flow [2023-11-06 22:25:10,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=518, PETRI_PLACES=96, PETRI_TRANSITIONS=82} [2023-11-06 22:25:10,982 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 37 predicate places. [2023-11-06 22:25:10,982 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 82 transitions, 518 flow [2023-11-06 22:25:10,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 187.0) internal successors, (1870), 10 states have internal predecessors, (1870), 0 states have call successors, (0), 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 22:25:10,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:10,983 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:10,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:11,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:11,194 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:25:11,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:11,195 INFO L85 PathProgramCache]: Analyzing trace with hash -381199873, now seen corresponding path program 1 times [2023-11-06 22:25:11,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:25:11,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686666222] [2023-11-06 22:25:11,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:11,195 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 22:25:11,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:25:11,196 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:11,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:11,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:25:11,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:25:11,340 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:25:11,340 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:25:11,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686666222] [2023-11-06 22:25:11,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686666222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:11,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:11,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:11,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892095466] [2023-11-06 22:25:11,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:11,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:11,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:25:11,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:11,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:11,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 446 [2023-11-06 22:25:11,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 82 transitions, 518 flow. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 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 22:25:11,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:11,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 446 [2023-11-06 22:25:11,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:12,680 INFO L124 PetriNetUnfolderBase]: 6060/7877 cut-off events. [2023-11-06 22:25:12,680 INFO L125 PetriNetUnfolderBase]: For 7538/8622 co-relation queries the response was YES. [2023-11-06 22:25:12,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26401 conditions, 7877 events. 6060/7877 cut-off events. For 7538/8622 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 36477 event pairs, 2556 based on Foata normal form. 1686/6793 useless extension candidates. Maximal degree in co-relation 26370. Up to 5595 conditions per place. [2023-11-06 22:25:12,747 INFO L140 encePairwiseOnDemand]: 440/446 looper letters, 81 selfloop transitions, 15 changer transitions 0/102 dead transitions. [2023-11-06 22:25:12,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 102 transitions, 767 flow [2023-11-06 22:25:12,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:12,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:12,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2023-11-06 22:25:12,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48878923766816146 [2023-11-06 22:25:12,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2023-11-06 22:25:12,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2023-11-06 22:25:12,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:12,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2023-11-06 22:25:12,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 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 22:25:12,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:25:12,752 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:25:12,753 INFO L175 Difference]: Start difference. First operand has 96 places, 82 transitions, 518 flow. Second operand 3 states and 654 transitions. [2023-11-06 22:25:12,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 102 transitions, 767 flow [2023-11-06 22:25:12,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 102 transitions, 739 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-06 22:25:12,766 INFO L231 Difference]: Finished difference. Result has 92 places, 79 transitions, 498 flow [2023-11-06 22:25:12,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=498, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2023-11-06 22:25:12,766 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 33 predicate places. [2023-11-06 22:25:12,767 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 498 flow [2023-11-06 22:25:12,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 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 22:25:12,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:12,767 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:12,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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)] Forceful destruction successful, exit code 0 [2023-11-06 22:25:12,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:12,967 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:25:12,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:12,968 INFO L85 PathProgramCache]: Analyzing trace with hash -152535018, now seen corresponding path program 2 times [2023-11-06 22:25:12,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:25:12,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445660436] [2023-11-06 22:25:12,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:25:12,968 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 22:25:12,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:25:12,969 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:12,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:13,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:25:13,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:25:13,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:25:13,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:13,139 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 8 treesize of output 7 [2023-11-06 22:25:13,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,155 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 13 treesize of output 1 [2023-11-06 22:25:13,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,188 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 18 treesize of output 1 [2023-11-06 22:25:13,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,199 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 13 treesize of output 1 [2023-11-06 22:25:13,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,211 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 13 treesize of output 1 [2023-11-06 22:25:13,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,218 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 8 treesize of output 1 [2023-11-06 22:25:13,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,246 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 18 treesize of output 1 [2023-11-06 22:25:13,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,256 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 13 treesize of output 1 [2023-11-06 22:25:13,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,278 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 18 treesize of output 1 [2023-11-06 22:25:13,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,316 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:25:13,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,344 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 18 treesize of output 1 [2023-11-06 22:25:13,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,357 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 13 treesize of output 1 [2023-11-06 22:25:13,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,373 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 13 treesize of output 1 [2023-11-06 22:25:13,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,381 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 8 treesize of output 1 [2023-11-06 22:25:13,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,399 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 8 treesize of output 1 [2023-11-06 22:25:13,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,411 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 13 treesize of output 1 [2023-11-06 22:25:13,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,423 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 13 treesize of output 1 [2023-11-06 22:25:13,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,444 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 18 treesize of output 1 [2023-11-06 22:25:13,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,468 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 18 treesize of output 1 [2023-11-06 22:25:13,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,482 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 13 treesize of output 1 [2023-11-06 22:25:13,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,492 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 8 treesize of output 1 [2023-11-06 22:25:13,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,506 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 13 treesize of output 1 [2023-11-06 22:25:13,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,516 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 8 treesize of output 1 [2023-11-06 22:25:13,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:13,533 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 13 treesize of output 1 [2023-11-06 22:25:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:25:13,826 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:25:13,827 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:25:13,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445660436] [2023-11-06 22:25:13,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445660436] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:13,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:13,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:25:13,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107464198] [2023-11-06 22:25:13,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:13,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:25:13,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:25:13,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:25:13,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:25:14,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 446 [2023-11-06 22:25:14,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 498 flow. Second operand has 5 states, 5 states have (on average 187.0) internal successors, (935), 5 states have internal predecessors, (935), 0 states have call successors, (0), 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 22:25:14,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:14,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 446 [2023-11-06 22:25:14,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:16,152 INFO L124 PetriNetUnfolderBase]: 3543/4805 cut-off events. [2023-11-06 22:25:16,152 INFO L125 PetriNetUnfolderBase]: For 6289/6882 co-relation queries the response was YES. [2023-11-06 22:25:16,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15901 conditions, 4805 events. 3543/4805 cut-off events. For 6289/6882 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 21078 event pairs, 1530 based on Foata normal form. 593/4622 useless extension candidates. Maximal degree in co-relation 15872. Up to 3250 conditions per place. [2023-11-06 22:25:16,186 INFO L140 encePairwiseOnDemand]: 440/446 looper letters, 96 selfloop transitions, 15 changer transitions 0/115 dead transitions. [2023-11-06 22:25:16,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 115 transitions, 930 flow [2023-11-06 22:25:16,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:25:16,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:25:16,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 973 transitions. [2023-11-06 22:25:16,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43632286995515696 [2023-11-06 22:25:16,188 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 973 transitions. [2023-11-06 22:25:16,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 973 transitions. [2023-11-06 22:25:16,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:16,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 973 transitions. [2023-11-06 22:25:16,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 194.6) internal successors, (973), 5 states have internal predecessors, (973), 0 states have call successors, (0), 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 22:25:16,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 446.0) internal successors, (2676), 6 states have internal predecessors, (2676), 0 states have call successors, (0), 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 22:25:16,193 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 446.0) internal successors, (2676), 6 states have internal predecessors, (2676), 0 states have call successors, (0), 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 22:25:16,193 INFO L175 Difference]: Start difference. First operand has 92 places, 79 transitions, 498 flow. Second operand 5 states and 973 transitions. [2023-11-06 22:25:16,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 115 transitions, 930 flow [2023-11-06 22:25:16,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 115 transitions, 892 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:25:16,212 INFO L231 Difference]: Finished difference. Result has 92 places, 77 transitions, 490 flow [2023-11-06 22:25:16,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=490, PETRI_PLACES=92, PETRI_TRANSITIONS=77} [2023-11-06 22:25:16,213 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 33 predicate places. [2023-11-06 22:25:16,213 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 77 transitions, 490 flow [2023-11-06 22:25:16,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 187.0) internal successors, (935), 5 states have internal predecessors, (935), 0 states have call successors, (0), 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 22:25:16,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:16,213 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:16,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:16,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:16,425 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:25:16,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:16,425 INFO L85 PathProgramCache]: Analyzing trace with hash -159656189, now seen corresponding path program 2 times [2023-11-06 22:25:16,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:25:16,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699628391] [2023-11-06 22:25:16,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:25:16,426 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 22:25:16,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:25:16,428 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:16,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:16,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:25:16,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:25:16,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:25:16,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:16,657 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 18 treesize of output 7 [2023-11-06 22:25:16,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,676 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 13 treesize of output 1 [2023-11-06 22:25:16,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,691 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 13 treesize of output 1 [2023-11-06 22:25:16,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,699 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 8 treesize of output 1 [2023-11-06 22:25:16,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,710 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 8 treesize of output 1 [2023-11-06 22:25:16,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,721 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 13 treesize of output 1 [2023-11-06 22:25:16,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,745 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 18 treesize of output 1 [2023-11-06 22:25:16,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,756 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 13 treesize of output 1 [2023-11-06 22:25:16,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,781 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 18 treesize of output 1 [2023-11-06 22:25:16,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,794 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 13 treesize of output 1 [2023-11-06 22:25:16,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,826 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:25:16,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,844 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 18 treesize of output 1 [2023-11-06 22:25:16,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,856 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 13 treesize of output 1 [2023-11-06 22:25:16,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,862 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 8 treesize of output 1 [2023-11-06 22:25:16,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,870 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 8 treesize of output 1 [2023-11-06 22:25:16,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,880 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 13 treesize of output 1 [2023-11-06 22:25:16,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,902 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 18 treesize of output 1 [2023-11-06 22:25:16,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,914 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 13 treesize of output 1 [2023-11-06 22:25:16,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,926 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 13 treesize of output 1 [2023-11-06 22:25:16,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,934 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 8 treesize of output 1 [2023-11-06 22:25:16,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,945 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 13 treesize of output 1 [2023-11-06 22:25:16,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,953 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 8 treesize of output 1 [2023-11-06 22:25:16,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,976 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 18 treesize of output 1 [2023-11-06 22:25:16,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:16,988 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 13 treesize of output 1 [2023-11-06 22:25:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:25:17,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:25:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:25:18,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:25:18,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699628391] [2023-11-06 22:25:18,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699628391] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:25:18,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:25:18,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:25:18,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397025609] [2023-11-06 22:25:18,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:25:18,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:25:18,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:25:18,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:25:18,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:25:25,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 446 [2023-11-06 22:25:25,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 77 transitions, 490 flow. Second operand has 10 states, 10 states have (on average 184.0) internal successors, (1840), 10 states have internal predecessors, (1840), 0 states have call successors, (0), 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 22:25:25,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:25,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 446 [2023-11-06 22:25:25,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:29,685 INFO L124 PetriNetUnfolderBase]: 8115/10385 cut-off events. [2023-11-06 22:25:29,685 INFO L125 PetriNetUnfolderBase]: For 13099/13569 co-relation queries the response was YES. [2023-11-06 22:25:29,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34388 conditions, 10385 events. 8115/10385 cut-off events. For 13099/13569 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 45045 event pairs, 932 based on Foata normal form. 890/9425 useless extension candidates. Maximal degree in co-relation 34359. Up to 3404 conditions per place. [2023-11-06 22:25:29,791 INFO L140 encePairwiseOnDemand]: 438/446 looper letters, 213 selfloop transitions, 27 changer transitions 0/244 dead transitions. [2023-11-06 22:25:29,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 244 transitions, 1866 flow [2023-11-06 22:25:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:25:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:25:29,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1749 transitions. [2023-11-06 22:25:29,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43572496263079225 [2023-11-06 22:25:29,796 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1749 transitions. [2023-11-06 22:25:29,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1749 transitions. [2023-11-06 22:25:29,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:29,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1749 transitions. [2023-11-06 22:25:29,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 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 22:25:29,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 446.0) internal successors, (4460), 10 states have internal predecessors, (4460), 0 states have call successors, (0), 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 22:25:29,802 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 446.0) internal successors, (4460), 10 states have internal predecessors, (4460), 0 states have call successors, (0), 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 22:25:29,802 INFO L175 Difference]: Start difference. First operand has 92 places, 77 transitions, 490 flow. Second operand 9 states and 1749 transitions. [2023-11-06 22:25:29,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 244 transitions, 1866 flow [2023-11-06 22:25:29,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 244 transitions, 1824 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:25:29,832 INFO L231 Difference]: Finished difference. Result has 98 places, 87 transitions, 589 flow [2023-11-06 22:25:29,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=589, PETRI_PLACES=98, PETRI_TRANSITIONS=87} [2023-11-06 22:25:29,833 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 39 predicate places. [2023-11-06 22:25:29,833 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 87 transitions, 589 flow [2023-11-06 22:25:29,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 184.0) internal successors, (1840), 10 states have internal predecessors, (1840), 0 states have call successors, (0), 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 22:25:29,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:29,834 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:29,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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)] Forceful destruction successful, exit code 0 [2023-11-06 22:25:30,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:30,038 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:25:30,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:30,038 INFO L85 PathProgramCache]: Analyzing trace with hash -654372633, now seen corresponding path program 1 times [2023-11-06 22:25:30,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:25:30,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [66367404] [2023-11-06 22:25:30,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:30,038 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 22:25:30,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:25:30,039 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:30,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:30,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:25:30,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:25:30,191 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:25:30,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:25:30,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [66367404] [2023-11-06 22:25:30,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [66367404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:30,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:30,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:30,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288489643] [2023-11-06 22:25:30,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:30,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:30,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:25:30,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:30,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:30,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 446 [2023-11-06 22:25:30,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 87 transitions, 589 flow. Second operand has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 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 22:25:30,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:30,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 446 [2023-11-06 22:25:30,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:32,065 INFO L124 PetriNetUnfolderBase]: 9683/12376 cut-off events. [2023-11-06 22:25:32,065 INFO L125 PetriNetUnfolderBase]: For 16024/16962 co-relation queries the response was YES. [2023-11-06 22:25:32,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43765 conditions, 12376 events. 9683/12376 cut-off events. For 16024/16962 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 54723 event pairs, 3941 based on Foata normal form. 1778/11103 useless extension candidates. Maximal degree in co-relation 43734. Up to 9130 conditions per place. [2023-11-06 22:25:32,173 INFO L140 encePairwiseOnDemand]: 440/446 looper letters, 106 selfloop transitions, 15 changer transitions 0/127 dead transitions. [2023-11-06 22:25:32,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 127 transitions, 1043 flow [2023-11-06 22:25:32,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:32,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:32,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 647 transitions. [2023-11-06 22:25:32,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48355754857997013 [2023-11-06 22:25:32,175 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 647 transitions. [2023-11-06 22:25:32,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 647 transitions. [2023-11-06 22:25:32,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:32,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 647 transitions. [2023-11-06 22:25:32,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 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 22:25:32,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:25:32,177 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 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 22:25:32,177 INFO L175 Difference]: Start difference. First operand has 98 places, 87 transitions, 589 flow. Second operand 3 states and 647 transitions. [2023-11-06 22:25:32,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 127 transitions, 1043 flow [2023-11-06 22:25:32,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 127 transitions, 1006 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-11-06 22:25:32,200 INFO L231 Difference]: Finished difference. Result has 99 places, 90 transitions, 647 flow [2023-11-06 22:25:32,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=647, PETRI_PLACES=99, PETRI_TRANSITIONS=90} [2023-11-06 22:25:32,201 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 40 predicate places. [2023-11-06 22:25:32,201 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 90 transitions, 647 flow [2023-11-06 22:25:32,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 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 22:25:32,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:32,202 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-11-06 22:25:32,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:32,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:32,404 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:25:32,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:32,404 INFO L85 PathProgramCache]: Analyzing trace with hash 612093159, now seen corresponding path program 3 times [2023-11-06 22:25:32,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:25:32,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275908545] [2023-11-06 22:25:32,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:25:32,405 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 22:25:32,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:25:32,406 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:32,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:25:32,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 22:25:32,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:25:32,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:25:32,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:32,670 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 13 treesize of output 7 [2023-11-06 22:25:32,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,696 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 18 treesize of output 1 [2023-11-06 22:25:32,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,730 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:25:32,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,750 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 18 treesize of output 1 [2023-11-06 22:25:32,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,761 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 13 treesize of output 1 [2023-11-06 22:25:32,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,779 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 18 treesize of output 1 [2023-11-06 22:25:32,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,799 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 18 treesize of output 1 [2023-11-06 22:25:32,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,808 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 13 treesize of output 1 [2023-11-06 22:25:32,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,815 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 8 treesize of output 1 [2023-11-06 22:25:32,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,824 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 13 treesize of output 1 [2023-11-06 22:25:32,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,835 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 13 treesize of output 1 [2023-11-06 22:25:32,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,842 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 8 treesize of output 1 [2023-11-06 22:25:32,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,850 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 8 treesize of output 1 [2023-11-06 22:25:32,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,861 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 13 treesize of output 1 [2023-11-06 22:25:32,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,884 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 18 treesize of output 1 [2023-11-06 22:25:32,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,895 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 13 treesize of output 1 [2023-11-06 22:25:32,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,909 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 13 treesize of output 1 [2023-11-06 22:25:32,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,917 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 8 treesize of output 1 [2023-11-06 22:25:32,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,932 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 13 treesize of output 1 [2023-11-06 22:25:32,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,940 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 8 treesize of output 1 [2023-11-06 22:25:32,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,956 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 13 treesize of output 1 [2023-11-06 22:25:32,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,981 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 18 treesize of output 1 [2023-11-06 22:25:32,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:32,994 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 13 treesize of output 1 [2023-11-06 22:25:33,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:25:33,003 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 8 treesize of output 1 [2023-11-06 22:25:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:33,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:25:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:36,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:25:36,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275908545] [2023-11-06 22:25:36,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275908545] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:25:36,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:25:36,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-11-06 22:25:36,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965323418] [2023-11-06 22:25:36,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:25:36,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:25:36,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:25:36,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:25:36,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:26:06,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 446 [2023-11-06 22:26:06,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 90 transitions, 647 flow. Second operand has 24 states, 24 states have (on average 190.0) internal successors, (4560), 24 states have internal predecessors, (4560), 0 states have call successors, (0), 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 22:26:06,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:06,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 446 [2023-11-06 22:26:06,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:28,148 INFO L124 PetriNetUnfolderBase]: 9695/12400 cut-off events. [2023-11-06 22:26:28,148 INFO L125 PetriNetUnfolderBase]: For 19143/20375 co-relation queries the response was YES. [2023-11-06 22:26:28,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45356 conditions, 12400 events. 9695/12400 cut-off events. For 19143/20375 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 54746 event pairs, 5085 based on Foata normal form. 1244/11293 useless extension candidates. Maximal degree in co-relation 45323. Up to 12353 conditions per place. [2023-11-06 22:26:28,273 INFO L140 encePairwiseOnDemand]: 442/446 looper letters, 64 selfloop transitions, 44 changer transitions 0/114 dead transitions. [2023-11-06 22:26:28,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 114 transitions, 1127 flow [2023-11-06 22:26:28,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:26:28,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:26:28,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4620 transitions. [2023-11-06 22:26:28,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4316143497757848 [2023-11-06 22:26:28,280 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4620 transitions. [2023-11-06 22:26:28,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4620 transitions. [2023-11-06 22:26:28,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:28,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4620 transitions. [2023-11-06 22:26:28,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 192.5) internal successors, (4620), 24 states have internal predecessors, (4620), 0 states have call successors, (0), 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 22:26:28,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 446.0) internal successors, (11150), 25 states have internal predecessors, (11150), 0 states have call successors, (0), 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 22:26:28,295 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 446.0) internal successors, (11150), 25 states have internal predecessors, (11150), 0 states have call successors, (0), 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 22:26:28,295 INFO L175 Difference]: Start difference. First operand has 99 places, 90 transitions, 647 flow. Second operand 24 states and 4620 transitions. [2023-11-06 22:26:28,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 114 transitions, 1127 flow [2023-11-06 22:26:28,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 114 transitions, 1073 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:26:28,420 INFO L231 Difference]: Finished difference. Result has 132 places, 114 transitions, 1009 flow [2023-11-06 22:26:28,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1009, PETRI_PLACES=132, PETRI_TRANSITIONS=114} [2023-11-06 22:26:28,421 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 73 predicate places. [2023-11-06 22:26:28,421 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 114 transitions, 1009 flow [2023-11-06 22:26:28,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 190.0) internal successors, (4560), 24 states have internal predecessors, (4560), 0 states have call successors, (0), 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 22:26:28,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:28,423 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:28,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:26:28,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:26:28,631 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 22:26:28,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:28,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1189219393, now seen corresponding path program 1 times [2023-11-06 22:26:28,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:26:28,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813437524] [2023-11-06 22:26:28,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:28,632 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 22:26:28,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:26:28,633 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:26:28,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f11a587-a257-42f5-a082-7888cc556948/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 22:26:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:28,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:26:28,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:26:28,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:29,092 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 23 treesize of output 19 [2023-11-06 22:26:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:26:29,307 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:26:29,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813437524] [2023-11-06 22:26:29,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813437524] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:29,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:26:29,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:26:29,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076161545] [2023-11-06 22:26:29,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:29,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:26:29,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:26:29,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:26:29,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:26:34,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 446 [2023-11-06 22:26:34,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 114 transitions, 1009 flow. Second operand has 12 states, 12 states have (on average 185.0) internal successors, (2220), 12 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:26:34,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:34,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 446 [2023-11-06 22:26:34,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand