./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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_12356e4d-58e0-47ca-885b-d0840991e6cf/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 d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:58:41,611 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:58:41,698 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:58:41,705 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:58:41,705 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:58:41,754 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:58:41,755 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:58:41,756 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:58:41,757 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:58:41,762 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:58:41,764 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:58:41,764 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:58:41,765 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:58:41,767 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:58:41,767 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:58:41,768 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:58:41,768 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:58:41,768 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:58:41,769 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:58:41,769 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:58:41,770 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:58:41,770 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:58:41,771 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:58:41,771 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:58:41,772 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:58:41,772 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:58:41,773 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:58:41,773 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:58:41,774 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:58:41,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:58:41,776 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:58:41,776 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:58:41,776 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:58:41,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:58:41,777 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:58:41,777 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:58:41,777 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:58:41,778 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:58:41,778 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_12356e4d-58e0-47ca-885b-d0840991e6cf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 [2023-11-06 22:58:42,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:58:42,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:58:42,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:58:42,117 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:58:42,118 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:58:42,120 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2023-11-06 22:58:45,240 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:58:45,449 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:58:45,449 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2023-11-06 22:58:45,460 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/data/d1c2fc8a7/4914d29e25bc486782d70f2925b03eef/FLAGc4c26aadc [2023-11-06 22:58:45,475 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/data/d1c2fc8a7/4914d29e25bc486782d70f2925b03eef [2023-11-06 22:58:45,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:58:45,481 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:58:45,483 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:58:45,483 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:58:45,491 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:58:45,492 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:45" (1/1) ... [2023-11-06 22:58:45,494 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fbdf7a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:45, skipping insertion in model container [2023-11-06 22:58:45,494 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:45" (1/1) ... [2023-11-06 22:58:45,534 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:58:45,717 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:58:45,729 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 22:58:45,729 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4196efe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:45, skipping insertion in model container [2023-11-06 22:58:45,730 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:58:45,730 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 22:58:45,732 INFO L158 Benchmark]: Toolchain (without parser) took 251.79ms. Allocated memory is still 190.8MB. Free memory was 143.3MB in the beginning and 133.2MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:58:45,733 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 146.8MB. Free memory is still 92.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:58:45,733 INFO L158 Benchmark]: CACSL2BoogieTranslator took 247.04ms. Allocated memory is still 190.8MB. Free memory was 143.3MB in the beginning and 133.2MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:58:45,735 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 146.8MB. Free memory is still 92.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 247.04ms. Allocated memory is still 190.8MB. Free memory was 143.3MB in the beginning and 133.2MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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_12356e4d-58e0-47ca-885b-d0840991e6cf/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 d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:58:48,227 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:58:48,368 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 22:58:48,376 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:58:48,377 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:58:48,421 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:58:48,421 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:58:48,422 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:58:48,423 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:58:48,428 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:58:48,429 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:58:48,429 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:58:48,430 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:58:48,431 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:58:48,432 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:58:48,432 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:58:48,433 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:58:48,433 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:58:48,433 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:58:48,435 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:58:48,435 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:58:48,436 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:58:48,436 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:58:48,436 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 22:58:48,437 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 22:58:48,437 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:58:48,438 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:58:48,438 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:58:48,439 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:58:48,439 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:58:48,441 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:58:48,441 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:58:48,441 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:58:48,442 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:58:48,442 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 22:58:48,442 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 22:58:48,442 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:58:48,443 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:58:48,443 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:58:48,444 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 22:58:48,444 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:58:48,444 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_12356e4d-58e0-47ca-885b-d0840991e6cf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 [2023-11-06 22:58:48,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:58:48,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:58:48,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:58:48,852 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:58:48,853 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:58:48,855 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2023-11-06 22:58:52,009 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:58:52,317 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:58:52,317 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2023-11-06 22:58:52,326 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/data/d9ee2a9e1/9aa493ba7c744e2c9d537710c3b97d0e/FLAG2602e8ffb [2023-11-06 22:58:52,346 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/data/d9ee2a9e1/9aa493ba7c744e2c9d537710c3b97d0e [2023-11-06 22:58:52,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:58:52,350 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:58:52,352 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:58:52,352 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:58:52,363 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:58:52,364 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:52" (1/1) ... [2023-11-06 22:58:52,365 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f5a834a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:52, skipping insertion in model container [2023-11-06 22:58:52,366 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:52" (1/1) ... [2023-11-06 22:58:52,391 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:58:52,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:58:52,603 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 22:58:52,611 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:58:52,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:58:52,666 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:58:52,725 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:58:52,749 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:58:52,749 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:52 WrapperNode [2023-11-06 22:58:52,750 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:58:52,751 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:58:52,751 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:58:52,752 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:58:52,759 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:52" (1/1) ... [2023-11-06 22:58:52,787 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:52" (1/1) ... [2023-11-06 22:58:52,842 INFO L138 Inliner]: procedures = 28, calls = 51, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 282 [2023-11-06 22:58:52,842 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:58:52,843 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:58:52,843 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:58:52,843 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:58:52,856 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:52" (1/1) ... [2023-11-06 22:58:52,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:52" (1/1) ... [2023-11-06 22:58:52,877 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:52" (1/1) ... [2023-11-06 22:58:52,877 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:52" (1/1) ... [2023-11-06 22:58:52,906 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:52" (1/1) ... [2023-11-06 22:58:52,911 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:52" (1/1) ... [2023-11-06 22:58:52,914 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:52" (1/1) ... [2023-11-06 22:58:52,917 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:52" (1/1) ... [2023-11-06 22:58:52,938 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:58:52,939 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:58:52,939 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:58:52,939 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:58:52,940 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:52" (1/1) ... [2023-11-06 22:58:52,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:58:52,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:52,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:53,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:58:53,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:58:53,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 22:58:53,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:58:53,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 22:58:53,057 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:58:53,057 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:58:53,057 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:58:53,058 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:58:53,058 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:58:53,058 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:58:53,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:58:53,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:58:53,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:58:53,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:58:53,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 22:58:53,063 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 22:58:53,242 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:58:53,244 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:58:54,143 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:58:54,156 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:58:54,157 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-06 22:58:54,160 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:54 BoogieIcfgContainer [2023-11-06 22:58:54,160 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:58:54,163 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:58:54,163 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:58:54,167 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:58:54,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:58:52" (1/3) ... [2023-11-06 22:58:54,168 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c93f1f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:58:54, skipping insertion in model container [2023-11-06 22:58:54,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:52" (2/3) ... [2023-11-06 22:58:54,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c93f1f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:58:54, skipping insertion in model container [2023-11-06 22:58:54,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:54" (3/3) ... [2023-11-06 22:58:54,171 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2023-11-06 22:58:54,192 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:58:54,192 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-06 22:58:54,192 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:58:54,388 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:58:54,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 384 places, 403 transitions, 827 flow [2023-11-06 22:58:54,586 INFO L124 PetriNetUnfolderBase]: 29/400 cut-off events. [2023-11-06 22:58:54,586 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:58:54,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 400 events. 29/400 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 851 event pairs, 0 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 295. Up to 3 conditions per place. [2023-11-06 22:58:54,597 INFO L82 GeneralOperation]: Start removeDead. Operand has 384 places, 403 transitions, 827 flow [2023-11-06 22:58:54,609 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 376 places, 395 transitions, 808 flow [2023-11-06 22:58:54,613 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:58:54,623 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 376 places, 395 transitions, 808 flow [2023-11-06 22:58:54,626 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 376 places, 395 transitions, 808 flow [2023-11-06 22:58:54,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 376 places, 395 transitions, 808 flow [2023-11-06 22:58:54,775 INFO L124 PetriNetUnfolderBase]: 29/395 cut-off events. [2023-11-06 22:58:54,776 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:58:54,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 408 conditions, 395 events. 29/395 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 853 event pairs, 0 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 295. Up to 3 conditions per place. [2023-11-06 22:58:54,801 INFO L119 LiptonReduction]: Number of co-enabled transitions 25650 [2023-11-06 23:00:00,235 INFO L134 LiptonReduction]: Checked pairs total: 39438 [2023-11-06 23:00:00,236 INFO L136 LiptonReduction]: Total number of compositions: 483 [2023-11-06 23:00:00,273 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:00:00,282 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;@190c866d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:00:00,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-11-06 23:00:00,294 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:00:00,294 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 23:00:00,294 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:00:00,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:00,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:00:00,296 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:00:00,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:00,305 INFO L85 PathProgramCache]: Analyzing trace with hash 51458, now seen corresponding path program 1 times [2023-11-06 23:00:00,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:00:00,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824745619] [2023-11-06 23:00:00,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:00,323 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 23:00:00,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:00:00,332 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:00:00,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:00:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:00,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:00:00,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:00,673 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 7 [2023-11-06 23:00:00,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:00,704 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 23:00:00,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:00,719 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 23:00:00,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:00,728 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 23:00:00,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:00,743 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 11 treesize of output 1 [2023-11-06 23:00:00,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:00,752 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 23:00:00,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:00,804 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 23:00:00,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:00,819 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 23:00:00,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:00,850 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 23:00:00,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:00,900 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 23:00:00,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:00,937 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 23:00:00,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:00,952 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 23:00:00,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:00,974 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 23:00:00,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:00,983 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 23:00:00,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:00,996 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 23:00:01,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:01,006 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 23:00:01,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:01,023 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 23:00:01,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:01,047 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 23:00:01,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:01,070 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 23:00:01,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:01,082 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 23:00:01,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:01,100 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 23:00:01,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:01,112 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 23:00:01,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:01,140 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 23:00:01,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:01,151 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 23:00:01,162 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 23:00:01,162 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:01,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:01,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824745619] [2023-11-06 23:00:01,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824745619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:01,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:01,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:00:01,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692926181] [2023-11-06 23:00:01,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:01,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:00:01,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:01,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:00:01,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:00:01,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 358 out of 886 [2023-11-06 23:00:01,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 358.6666666666667) internal successors, (1076), 3 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:01,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:01,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 358 of 886 [2023-11-06 23:00:01,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:07,651 INFO L124 PetriNetUnfolderBase]: 18460/25219 cut-off events. [2023-11-06 23:00:07,651 INFO L125 PetriNetUnfolderBase]: For 483/483 co-relation queries the response was YES. [2023-11-06 23:00:07,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50971 conditions, 25219 events. 18460/25219 cut-off events. For 483/483 co-relation queries the response was YES. Maximal size of possible extension queue 1432. Compared 140132 event pairs, 15757 based on Foata normal form. 0/8337 useless extension candidates. Maximal degree in co-relation 48308. Up to 25211 conditions per place. [2023-11-06 23:00:07,870 INFO L140 encePairwiseOnDemand]: 874/886 looper letters, 67 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2023-11-06 23:00:07,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 302 flow [2023-11-06 23:00:07,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:00:07,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:00:07,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1153 transitions. [2023-11-06 23:00:07,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43378480060195634 [2023-11-06 23:00:07,903 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1153 transitions. [2023-11-06 23:00:07,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1153 transitions. [2023-11-06 23:00:07,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:07,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1153 transitions. [2023-11-06 23:00:07,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 384.3333333333333) internal successors, (1153), 3 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:07,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 886.0) internal successors, (3544), 4 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:07,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 886.0) internal successors, (3544), 4 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:07,950 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 176 flow. Second operand 3 states and 1153 transitions. [2023-11-06 23:00:07,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 302 flow [2023-11-06 23:00:07,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 290 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 23:00:07,967 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 156 flow [2023-11-06 23:00:07,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=886, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2023-11-06 23:00:07,980 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -12 predicate places. [2023-11-06 23:00:07,981 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 156 flow [2023-11-06 23:00:07,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 358.6666666666667) internal successors, (1076), 3 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:07,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:07,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:00:08,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:00:08,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:00:08,197 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:00:08,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:08,198 INFO L85 PathProgramCache]: Analyzing trace with hash 51459, now seen corresponding path program 1 times [2023-11-06 23:00:08,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:00:08,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610486776] [2023-11-06 23:00:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:08,199 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 23:00:08,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:00:08,208 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:00:08,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:00:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:08,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:00:08,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:08,401 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 23:00:08,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,420 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 23:00:08,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,431 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 23:00:08,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,444 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 23:00:08,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,455 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 23:00:08,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,468 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 23:00:08,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,486 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 13 treesize of output 1 [2023-11-06 23:00:08,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,495 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 23:00:08,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,505 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 23:00:08,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,518 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 23:00:08,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,534 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 23:00:08,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,559 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 23:00:08,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,573 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 23:00:08,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,586 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 23:00:08,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,603 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 23:00:08,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,629 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 23:00:08,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,644 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 23:00:08,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,653 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 23:00:08,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,687 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 23:00:08,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,725 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 23:00:08,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,753 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 23:00:08,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,767 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 23:00:08,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,784 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 23:00:08,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:08,808 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 23:00:08,836 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 23:00:08,836 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:08,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:08,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610486776] [2023-11-06 23:00:08,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610486776] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:08,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:08,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:00:08,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93829193] [2023-11-06 23:00:08,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:08,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:00:08,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:08,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:00:08,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:00:09,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 886 [2023-11-06 23:00:09,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 355.6666666666667) internal successors, (1067), 3 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:09,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:09,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 886 [2023-11-06 23:00:09,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:14,043 INFO L124 PetriNetUnfolderBase]: 18465/25227 cut-off events. [2023-11-06 23:00:14,043 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-11-06 23:00:14,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50675 conditions, 25227 events. 18465/25227 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 1432. Compared 140120 event pairs, 15757 based on Foata normal form. 0/8342 useless extension candidates. Maximal degree in co-relation 50625. Up to 25223 conditions per place. [2023-11-06 23:00:14,199 INFO L140 encePairwiseOnDemand]: 874/886 looper letters, 70 selfloop transitions, 9 changer transitions 0/79 dead transitions. [2023-11-06 23:00:14,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 79 transitions, 336 flow [2023-11-06 23:00:14,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:00:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:00:14,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1147 transitions. [2023-11-06 23:00:14,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43152746425884125 [2023-11-06 23:00:14,207 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1147 transitions. [2023-11-06 23:00:14,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1147 transitions. [2023-11-06 23:00:14,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:14,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1147 transitions. [2023-11-06 23:00:14,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 382.3333333333333) internal successors, (1147), 3 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:14,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 886.0) internal successors, (3544), 4 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:14,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 886.0) internal successors, (3544), 4 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:14,226 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 156 flow. Second operand 3 states and 1147 transitions. [2023-11-06 23:00:14,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 79 transitions, 336 flow [2023-11-06 23:00:14,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 79 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:00:14,230 INFO L231 Difference]: Finished difference. Result has 71 places, 79 transitions, 222 flow [2023-11-06 23:00:14,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=886, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=71, PETRI_TRANSITIONS=79} [2023-11-06 23:00:14,232 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -10 predicate places. [2023-11-06 23:00:14,232 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 79 transitions, 222 flow [2023-11-06 23:00:14,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 355.6666666666667) internal successors, (1067), 3 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:14,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:14,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 23:00:14,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:00:14,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:00:14,446 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:00:14,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:14,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1600622, now seen corresponding path program 1 times [2023-11-06 23:00:14,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:00:14,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834295025] [2023-11-06 23:00:14,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:14,448 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 23:00:14,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:00:14,454 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:00:14,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:00:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:14,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:00:14,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:14,607 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 23 treesize of output 7 [2023-11-06 23:00:14,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,652 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 23:00:14,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,678 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 23:00:14,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,705 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 23:00:14,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,727 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:00:14,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,753 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 23:00:14,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,770 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 13 treesize of output 1 [2023-11-06 23:00:14,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,781 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 23:00:14,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,791 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 23:00:14,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,806 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 23:00:14,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,823 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 23:00:14,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,853 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 23:00:14,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,882 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 23:00:14,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,898 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 23:00:14,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,910 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 23:00:14,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,924 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 23:00:14,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,940 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 23:00:14,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,949 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 23:00:14,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,961 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 23:00:14,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,974 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 23:00:14,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,984 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 23:00:14,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:14,998 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 23:00:15,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:15,016 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 23:00:15,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:15,042 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 23:00:15,135 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 23:00:15,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:15,406 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 23:00:15,406 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:15,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834295025] [2023-11-06 23:00:15,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834295025] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:15,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:00:15,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 23:00:15,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102683501] [2023-11-06 23:00:15,407 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:15,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:00:15,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:15,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:00:15,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:00:18,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 886 [2023-11-06 23:00:18,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 79 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:18,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:18,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 886 [2023-11-06 23:00:18,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:19,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:00:21,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:00:26,055 INFO L124 PetriNetUnfolderBase]: 18480/25251 cut-off events. [2023-11-06 23:00:26,056 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-11-06 23:00:26,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50776 conditions, 25251 events. 18480/25251 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 1432. Compared 140188 event pairs, 15757 based on Foata normal form. 0/8359 useless extension candidates. Maximal degree in co-relation 50625. Up to 25232 conditions per place. [2023-11-06 23:00:26,206 INFO L140 encePairwiseOnDemand]: 874/886 looper letters, 70 selfloop transitions, 33 changer transitions 0/103 dead transitions. [2023-11-06 23:00:26,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 103 transitions, 536 flow [2023-11-06 23:00:26,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:00:26,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:00:26,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2152 transitions. [2023-11-06 23:00:26,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40481565086531224 [2023-11-06 23:00:26,220 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2152 transitions. [2023-11-06 23:00:26,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2152 transitions. [2023-11-06 23:00:26,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:26,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2152 transitions. [2023-11-06 23:00:26,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 358.6666666666667) internal successors, (2152), 6 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:26,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 886.0) internal successors, (6202), 7 states have internal predecessors, (6202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:26,253 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 886.0) internal successors, (6202), 7 states have internal predecessors, (6202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:26,253 INFO L175 Difference]: Start difference. First operand has 71 places, 79 transitions, 222 flow. Second operand 6 states and 2152 transitions. [2023-11-06 23:00:26,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 103 transitions, 536 flow [2023-11-06 23:00:26,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 103 transitions, 506 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:00:26,258 INFO L231 Difference]: Finished difference. Result has 77 places, 103 transitions, 429 flow [2023-11-06 23:00:26,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=886, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=69, 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=6, PETRI_FLOW=429, PETRI_PLACES=77, PETRI_TRANSITIONS=103} [2023-11-06 23:00:26,260 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -4 predicate places. [2023-11-06 23:00:26,260 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 103 transitions, 429 flow [2023-11-06 23:00:26,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:26,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:26,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:00:26,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:00:26,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:00:26,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:00:26,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:26,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1540190967, now seen corresponding path program 1 times [2023-11-06 23:00:26,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:00:26,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455880113] [2023-11-06 23:00:26,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:26,477 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 23:00:26,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:00:26,479 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:00:26,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:00:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:26,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 23:00:26,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:26,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:26,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:26,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:26,713 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 14 treesize of output 11 [2023-11-06 23:00:26,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:26,756 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-06 23:00:26,756 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-06 23:00:26,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:26,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:26,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:26,872 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:00:26,873 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 23:00:26,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:26,898 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 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 23:00:27,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:27,039 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 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 23:00:27,147 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:00:27,147 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 14 treesize of output 20 [2023-11-06 23:00:27,368 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 23:00:27,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:28,151 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 23:00:28,151 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:28,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455880113] [2023-11-06 23:00:28,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455880113] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:28,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:00:28,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 23:00:28,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911597314] [2023-11-06 23:00:28,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:28,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:00:28,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:28,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:00:28,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:00:30,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 23:00:34,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 23:00:39,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 886 [2023-11-06 23:00:39,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 103 transitions, 429 flow. Second operand has 10 states, 10 states have (on average 339.0) internal successors, (3390), 10 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:39,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:39,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 886 [2023-11-06 23:00:39,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:43,898 INFO L124 PetriNetUnfolderBase]: 14164/19562 cut-off events. [2023-11-06 23:00:43,899 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2023-11-06 23:00:43,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39445 conditions, 19562 events. 14164/19562 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 1079. Compared 107154 event pairs, 12033 based on Foata normal form. 0/6989 useless extension candidates. Maximal degree in co-relation 39342. Up to 19548 conditions per place. [2023-11-06 23:00:44,042 INFO L140 encePairwiseOnDemand]: 876/886 looper letters, 78 selfloop transitions, 19 changer transitions 0/97 dead transitions. [2023-11-06 23:00:44,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 97 transitions, 588 flow [2023-11-06 23:00:44,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:00:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:00:44,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1777 transitions. [2023-11-06 23:00:44,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40112866817155757 [2023-11-06 23:00:44,053 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1777 transitions. [2023-11-06 23:00:44,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1777 transitions. [2023-11-06 23:00:44,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:44,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1777 transitions. [2023-11-06 23:00:44,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 355.4) internal successors, (1777), 5 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:44,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 886.0) internal successors, (5316), 6 states have internal predecessors, (5316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:44,084 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 886.0) internal successors, (5316), 6 states have internal predecessors, (5316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:44,085 INFO L175 Difference]: Start difference. First operand has 77 places, 103 transitions, 429 flow. Second operand 5 states and 1777 transitions. [2023-11-06 23:00:44,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 97 transitions, 588 flow [2023-11-06 23:00:44,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 97 transitions, 544 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-11-06 23:00:44,092 INFO L231 Difference]: Finished difference. Result has 78 places, 97 transitions, 388 flow [2023-11-06 23:00:44,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=886, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=388, PETRI_PLACES=78, PETRI_TRANSITIONS=97} [2023-11-06 23:00:44,094 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -3 predicate places. [2023-11-06 23:00:44,094 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 97 transitions, 388 flow [2023-11-06 23:00:44,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 339.0) internal successors, (3390), 10 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:44,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:44,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 23:00:44,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:44,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:00:44,312 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:00:44,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:44,312 INFO L85 PathProgramCache]: Analyzing trace with hash 49683564, now seen corresponding path program 1 times [2023-11-06 23:00:44,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:00:44,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999113734] [2023-11-06 23:00:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:44,313 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 23:00:44,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:00:44,314 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:00:44,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:00:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:44,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 23:00:44,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:44,522 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:00:44,528 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:00:44,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:44,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:44,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:44,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:44,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:44,694 INFO L322 Elim1Store]: treesize reduction 80, result has 21.6 percent of original size [2023-11-06 23:00:44,695 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 52 [2023-11-06 23:00:45,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:45,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:45,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:45,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:45,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:45,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:45,248 INFO L322 Elim1Store]: treesize reduction 58, result has 28.4 percent of original size [2023-11-06 23:00:45,249 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 60 [2023-11-06 23:00:45,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:45,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:45,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:45,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:45,866 INFO L322 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2023-11-06 23:00:45,866 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 56 [2023-11-06 23:00:46,795 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 23:00:46,795 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:46,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:46,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999113734] [2023-11-06 23:00:46,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999113734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:46,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:46,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:00:46,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88074778] [2023-11-06 23:00:46,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:46,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:00:46,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:46,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:00:46,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:00:56,175 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 23:00:58,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:00:59,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 361 out of 886 [2023-11-06 23:00:59,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 97 transitions, 388 flow. Second operand has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:59,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:59,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 361 of 886 [2023-11-06 23:00:59,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:01,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:01:05,422 INFO L124 PetriNetUnfolderBase]: 9848/13873 cut-off events. [2023-11-06 23:01:05,423 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-11-06 23:01:05,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28051 conditions, 13873 events. 9848/13873 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 75392 event pairs, 8309 based on Foata normal form. 0/5621 useless extension candidates. Maximal degree in co-relation 27963. Up to 13873 conditions per place. [2023-11-06 23:01:05,490 INFO L140 encePairwiseOnDemand]: 883/886 looper letters, 90 selfloop transitions, 1 changer transitions 0/91 dead transitions. [2023-11-06 23:01:05,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 91 transitions, 538 flow [2023-11-06 23:01:05,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:01:05,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:01:05,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1152 transitions. [2023-11-06 23:01:05,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43340857787810383 [2023-11-06 23:01:05,498 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1152 transitions. [2023-11-06 23:01:05,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1152 transitions. [2023-11-06 23:01:05,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:05,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1152 transitions. [2023-11-06 23:01:05,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 384.0) internal successors, (1152), 3 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:05,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 886.0) internal successors, (3544), 4 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:05,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 886.0) internal successors, (3544), 4 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:05,513 INFO L175 Difference]: Start difference. First operand has 78 places, 97 transitions, 388 flow. Second operand 3 states and 1152 transitions. [2023-11-06 23:01:05,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 91 transitions, 538 flow [2023-11-06 23:01:05,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 91 transitions, 515 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 23:01:05,519 INFO L231 Difference]: Finished difference. Result has 75 places, 91 transitions, 335 flow [2023-11-06 23:01:05,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=886, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=335, PETRI_PLACES=75, PETRI_TRANSITIONS=91} [2023-11-06 23:01:05,521 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -6 predicate places. [2023-11-06 23:01:05,521 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 91 transitions, 335 flow [2023-11-06 23:01:05,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:05,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:05,522 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 23:01:05,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:01:05,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:01:05,736 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:01:05,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:05,737 INFO L85 PathProgramCache]: Analyzing trace with hash 444844995, now seen corresponding path program 2 times [2023-11-06 23:01:05,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:01:05,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315478578] [2023-11-06 23:01:05,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:01:05,737 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 23:01:05,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:01:05,738 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:01:05,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:01:05,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:01:05,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:01:05,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:01:05,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:05,890 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 23:01:05,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:05,907 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 23:01:05,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:05,922 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 23:01:05,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:05,932 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 23:01:05,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:05,949 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 23:01:05,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:05,977 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 23:01:05,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:05,998 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 23:01:06,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:06,024 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 23:01:06,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:06,056 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 23:01:06,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:06,100 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 23:01:06,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:06,128 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 23:01:06,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:06,142 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 23:01:06,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:06,154 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 23:01:06,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:06,169 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 23:01:06,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:06,180 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 23:01:06,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:06,196 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 23:01:06,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:06,214 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 23:01:06,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:06,236 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:01:06,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:06,255 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 23:01:06,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:06,279 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 23:01:06,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:06,294 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 23:01:06,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:06,304 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 8 treesize of output 1 [2023-11-06 23:01:06,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:06,315 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 23:01:06,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:06,329 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 23:01:06,553 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 23:01:06,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:07,476 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 23:01:07,477 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:01:07,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315478578] [2023-11-06 23:01:07,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315478578] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:01:07,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:01:07,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 23:01:07,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773326878] [2023-11-06 23:01:07,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:01:07,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:01:07,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:01:07,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:01:07,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:01:20,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 886 [2023-11-06 23:01:20,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 91 transitions, 335 flow. Second operand has 12 states, 12 states have (on average 344.0) internal successors, (4128), 12 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:20,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:20,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 886 [2023-11-06 23:01:20,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:25,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:01:27,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:01:29,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:01:31,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:01:34,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:01:36,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:01:38,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:01:40,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:01:42,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:01:45,833 INFO L124 PetriNetUnfolderBase]: 9859/13896 cut-off events. [2023-11-06 23:01:45,834 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2023-11-06 23:01:45,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28126 conditions, 13896 events. 9859/13896 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 75493 event pairs, 8309 based on Foata normal form. 10/5651 useless extension candidates. Maximal degree in co-relation 28114. Up to 13857 conditions per place. [2023-11-06 23:01:46,022 INFO L140 encePairwiseOnDemand]: 876/886 looper letters, 67 selfloop transitions, 47 changer transitions 0/114 dead transitions. [2023-11-06 23:01:46,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 114 transitions, 705 flow [2023-11-06 23:01:46,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:01:46,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 23:01:46,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 4583 transitions. [2023-11-06 23:01:46,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978989407883313 [2023-11-06 23:01:46,041 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 4583 transitions. [2023-11-06 23:01:46,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 4583 transitions. [2023-11-06 23:01:46,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:46,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 4583 transitions. [2023-11-06 23:01:46,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 352.53846153846155) internal successors, (4583), 13 states have internal predecessors, (4583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:46,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 886.0) internal successors, (12404), 14 states have internal predecessors, (12404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:46,088 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 886.0) internal successors, (12404), 14 states have internal predecessors, (12404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:46,088 INFO L175 Difference]: Start difference. First operand has 75 places, 91 transitions, 335 flow. Second operand 13 states and 4583 transitions. [2023-11-06 23:01:46,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 114 transitions, 705 flow [2023-11-06 23:01:46,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 114 transitions, 704 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:01:46,094 INFO L231 Difference]: Finished difference. Result has 92 places, 113 transitions, 618 flow [2023-11-06 23:01:46,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=886, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=618, PETRI_PLACES=92, PETRI_TRANSITIONS=113} [2023-11-06 23:01:46,095 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 11 predicate places. [2023-11-06 23:01:46,096 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 113 transitions, 618 flow [2023-11-06 23:01:46,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 344.0) internal successors, (4128), 12 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:46,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:46,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:01:46,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:46,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:01:46,307 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:01:46,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:46,308 INFO L85 PathProgramCache]: Analyzing trace with hash 501301255, now seen corresponding path program 1 times [2023-11-06 23:01:46,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:01:46,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553750708] [2023-11-06 23:01:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:46,308 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 23:01:46,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:01:46,309 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:01:46,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:01:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:46,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:01:46,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:46,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,461 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 15 treesize of output 11 [2023-11-06 23:01:46,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,512 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:01:46,512 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 24 treesize of output 1 [2023-11-06 23:01:46,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,557 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:01:46,557 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-06 23:01:46,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,584 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 15 treesize of output 1 [2023-11-06 23:01:46,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,636 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:01:46,637 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-06 23:01:46,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,666 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 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-06 23:01:46,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,732 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:01:46,732 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-06 23:01:46,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,775 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 0 case distinctions, treesize of input 22 treesize of output 1 [2023-11-06 23:01:46,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,805 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 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 23:01:46,853 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:01:46,854 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 14 treesize of output 20 [2023-11-06 23:01:46,904 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 23:01:46,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:46,905 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:01:46,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553750708] [2023-11-06 23:01:46,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553750708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:46,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:46,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:01:46,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406718877] [2023-11-06 23:01:46,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:46,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:01:46,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:01:46,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:01:46,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:01:47,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 886 [2023-11-06 23:01:47,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 113 transitions, 618 flow. Second operand has 4 states, 4 states have (on average 368.5) internal successors, (1474), 4 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 23:01:47,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:47,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 886 [2023-11-06 23:01:47,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:49,762 INFO L124 PetriNetUnfolderBase]: 9641/13566 cut-off events. [2023-11-06 23:01:49,762 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2023-11-06 23:01:49,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27555 conditions, 13566 events. 9641/13566 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 73363 event pairs, 8121 based on Foata normal form. 0/5575 useless extension candidates. Maximal degree in co-relation 27536. Up to 13566 conditions per place. [2023-11-06 23:01:49,850 INFO L140 encePairwiseOnDemand]: 883/886 looper letters, 110 selfloop transitions, 1 changer transitions 0/111 dead transitions. [2023-11-06 23:01:49,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 111 transitions, 836 flow [2023-11-06 23:01:49,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:01:49,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:01:49,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1168 transitions. [2023-11-06 23:01:49,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4394281414597442 [2023-11-06 23:01:49,856 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1168 transitions. [2023-11-06 23:01:49,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1168 transitions. [2023-11-06 23:01:49,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:49,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1168 transitions. [2023-11-06 23:01:49,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 389.3333333333333) internal successors, (1168), 3 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:49,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 886.0) internal successors, (3544), 4 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:49,871 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 886.0) internal successors, (3544), 4 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:49,871 INFO L175 Difference]: Start difference. First operand has 92 places, 113 transitions, 618 flow. Second operand 3 states and 1168 transitions. [2023-11-06 23:01:49,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 111 transitions, 836 flow [2023-11-06 23:01:49,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 111 transitions, 702 flow, removed 34 selfloop flow, removed 5 redundant places. [2023-11-06 23:01:49,879 INFO L231 Difference]: Finished difference. Result has 87 places, 111 transitions, 482 flow [2023-11-06 23:01:49,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=886, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=482, PETRI_PLACES=87, PETRI_TRANSITIONS=111} [2023-11-06 23:01:49,880 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 6 predicate places. [2023-11-06 23:01:49,880 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 111 transitions, 482 flow [2023-11-06 23:01:49,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 368.5) internal successors, (1474), 4 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 23:01:49,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:49,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:01:49,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:01:50,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:01:50,094 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:01:50,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:50,094 INFO L85 PathProgramCache]: Analyzing trace with hash 501301254, now seen corresponding path program 1 times [2023-11-06 23:01:50,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:01:50,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117393595] [2023-11-06 23:01:50,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:50,095 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 23:01:50,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:01:50,096 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:01:50,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:01:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:50,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:01:50,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:50,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,287 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 23:01:50,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,305 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 5 treesize of output 3 [2023-11-06 23:01:50,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,364 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 23:01:50,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,398 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 23:01:50,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,414 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 23:01:50,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,434 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 23:01:50,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,473 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 23:01:50,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,493 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 23:01:50,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,533 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 23:01:50,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,573 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 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 23:01:50,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:50,603 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 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 23:01:50,681 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 23:01:50,682 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:50,682 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:01:50,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117393595] [2023-11-06 23:01:50,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117393595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:50,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:50,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:01:50,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710691513] [2023-11-06 23:01:50,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:50,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:01:50,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:01:50,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:01:50,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:01:51,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 886 [2023-11-06 23:01:51,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 111 transitions, 482 flow. Second operand has 4 states, 4 states have (on average 368.5) internal successors, (1474), 4 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 23:01:51,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:51,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 886 [2023-11-06 23:01:51,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:53,380 INFO L124 PetriNetUnfolderBase]: 9423/13236 cut-off events. [2023-11-06 23:01:53,380 INFO L125 PetriNetUnfolderBase]: For 186/186 co-relation queries the response was YES. [2023-11-06 23:01:53,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26829 conditions, 13236 events. 9423/13236 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 71177 event pairs, 7933 based on Foata normal form. 0/5507 useless extension candidates. Maximal degree in co-relation 26810. Up to 13236 conditions per place. [2023-11-06 23:01:53,488 INFO L140 encePairwiseOnDemand]: 883/886 looper letters, 108 selfloop transitions, 1 changer transitions 0/109 dead transitions. [2023-11-06 23:01:53,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 109 transitions, 696 flow [2023-11-06 23:01:53,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:01:53,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:01:53,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1166 transitions. [2023-11-06 23:01:53,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43867569601203915 [2023-11-06 23:01:53,494 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1166 transitions. [2023-11-06 23:01:53,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1166 transitions. [2023-11-06 23:01:53,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:53,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1166 transitions. [2023-11-06 23:01:53,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 388.6666666666667) internal successors, (1166), 3 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:53,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 886.0) internal successors, (3544), 4 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:53,508 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 886.0) internal successors, (3544), 4 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:53,509 INFO L175 Difference]: Start difference. First operand has 87 places, 111 transitions, 482 flow. Second operand 3 states and 1166 transitions. [2023-11-06 23:01:53,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 109 transitions, 696 flow [2023-11-06 23:01:53,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 109 transitions, 695 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:01:53,516 INFO L231 Difference]: Finished difference. Result has 86 places, 109 transitions, 479 flow [2023-11-06 23:01:53,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=886, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=479, PETRI_PLACES=86, PETRI_TRANSITIONS=109} [2023-11-06 23:01:53,517 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 5 predicate places. [2023-11-06 23:01:53,517 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 109 transitions, 479 flow [2023-11-06 23:01:53,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 368.5) internal successors, (1474), 4 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 23:01:53,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:53,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:53,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:01:53,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:01:53,731 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:01:53,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:53,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1639535587, now seen corresponding path program 1 times [2023-11-06 23:01:53,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:01:53,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731098056] [2023-11-06 23:01:53,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:53,733 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 23:01:53,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:01:53,734 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:01:53,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:01:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:53,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:01:53,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:53,917 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 23:01:53,917 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:53,917 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:01:53,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731098056] [2023-11-06 23:01:53,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731098056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:53,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:53,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:01:53,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495236032] [2023-11-06 23:01:53,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:53,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:01:53,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:01:53,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:01:53,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:01:54,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 353 out of 886 [2023-11-06 23:01:54,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 109 transitions, 479 flow. Second operand has 5 states, 5 states have (on average 354.4) internal successors, (1772), 5 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:54,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:54,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 353 of 886 [2023-11-06 23:01:54,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:58,709 INFO L124 PetriNetUnfolderBase]: 11484/16304 cut-off events. [2023-11-06 23:01:58,710 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2023-11-06 23:01:58,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33092 conditions, 16304 events. 11484/16304 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 93090 event pairs, 8238 based on Foata normal form. 0/7214 useless extension candidates. Maximal degree in co-relation 33072. Up to 13235 conditions per place. [2023-11-06 23:01:58,864 INFO L140 encePairwiseOnDemand]: 877/886 looper letters, 206 selfloop transitions, 4 changer transitions 0/210 dead transitions. [2023-11-06 23:01:58,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 210 transitions, 1251 flow [2023-11-06 23:01:58,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:01:58,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:01:58,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1910 transitions. [2023-11-06 23:01:58,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43115124153498874 [2023-11-06 23:01:58,874 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1910 transitions. [2023-11-06 23:01:58,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1910 transitions. [2023-11-06 23:01:58,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:58,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1910 transitions. [2023-11-06 23:01:58,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 382.0) internal successors, (1910), 5 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:58,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 886.0) internal successors, (5316), 6 states have internal predecessors, (5316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:58,889 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 886.0) internal successors, (5316), 6 states have internal predecessors, (5316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:58,889 INFO L175 Difference]: Start difference. First operand has 86 places, 109 transitions, 479 flow. Second operand 5 states and 1910 transitions. [2023-11-06 23:01:58,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 210 transitions, 1251 flow [2023-11-06 23:01:58,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 210 transitions, 1250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:01:58,896 INFO L231 Difference]: Finished difference. Result has 91 places, 110 transitions, 503 flow [2023-11-06 23:01:58,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=886, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=503, PETRI_PLACES=91, PETRI_TRANSITIONS=110} [2023-11-06 23:01:58,897 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 10 predicate places. [2023-11-06 23:01:58,898 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 110 transitions, 503 flow [2023-11-06 23:01:58,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 354.4) internal successors, (1772), 5 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:58,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:58,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:58,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:01:59,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:01:59,100 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:01:59,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:59,100 INFO L85 PathProgramCache]: Analyzing trace with hash -250383470, now seen corresponding path program 1 times [2023-11-06 23:01:59,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:01:59,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300197320] [2023-11-06 23:01:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:59,101 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 23:01:59,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:01:59,102 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:01:59,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:01:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:59,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:01:59,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:59,334 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 23:01:59,334 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:59,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:01:59,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300197320] [2023-11-06 23:01:59,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300197320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:59,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:59,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:01:59,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640833349] [2023-11-06 23:01:59,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:59,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:01:59,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:01:59,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:01:59,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:01:59,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 353 out of 886 [2023-11-06 23:01:59,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 110 transitions, 503 flow. Second operand has 5 states, 5 states have (on average 354.6) internal successors, (1773), 5 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:59,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:59,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 353 of 886 [2023-11-06 23:01:59,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:04,021 INFO L124 PetriNetUnfolderBase]: 15592/22410 cut-off events. [2023-11-06 23:02:04,021 INFO L125 PetriNetUnfolderBase]: For 2627/2627 co-relation queries the response was YES. [2023-11-06 23:02:04,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48289 conditions, 22410 events. 15592/22410 cut-off events. For 2627/2627 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 136467 event pairs, 10338 based on Foata normal form. 254/11106 useless extension candidates. Maximal degree in co-relation 48266. Up to 16292 conditions per place. [2023-11-06 23:02:04,266 INFO L140 encePairwiseOnDemand]: 877/886 looper letters, 182 selfloop transitions, 15 changer transitions 0/197 dead transitions. [2023-11-06 23:02:04,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 197 transitions, 1157 flow [2023-11-06 23:02:04,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:02:04,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:02:04,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1907 transitions. [2023-11-06 23:02:04,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4304740406320542 [2023-11-06 23:02:04,274 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1907 transitions. [2023-11-06 23:02:04,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1907 transitions. [2023-11-06 23:02:04,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:04,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1907 transitions. [2023-11-06 23:02:04,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 381.4) internal successors, (1907), 5 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:04,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 886.0) internal successors, (5316), 6 states have internal predecessors, (5316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:04,286 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 886.0) internal successors, (5316), 6 states have internal predecessors, (5316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:04,286 INFO L175 Difference]: Start difference. First operand has 91 places, 110 transitions, 503 flow. Second operand 5 states and 1907 transitions. [2023-11-06 23:02:04,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 197 transitions, 1157 flow [2023-11-06 23:02:04,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 197 transitions, 1151 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 23:02:04,297 INFO L231 Difference]: Finished difference. Result has 96 places, 112 transitions, 556 flow [2023-11-06 23:02:04,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=886, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=556, PETRI_PLACES=96, PETRI_TRANSITIONS=112} [2023-11-06 23:02:04,299 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 15 predicate places. [2023-11-06 23:02:04,299 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 112 transitions, 556 flow [2023-11-06 23:02:04,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 354.6) internal successors, (1773), 5 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:04,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:04,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:04,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:02:04,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:02:04,510 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:02:04,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:04,511 INFO L85 PathProgramCache]: Analyzing trace with hash 714205560, now seen corresponding path program 1 times [2023-11-06 23:02:04,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:02:04,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140303371] [2023-11-06 23:02:04,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:04,511 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 23:02:04,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:02:04,516 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:02:04,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:02:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:04,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:02:04,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:04,733 INFO L322 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-06 23:02:04,734 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 19 treesize of output 15 [2023-11-06 23:02:04,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:04,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:04,793 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:02:04,793 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-06 23:02:04,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:04,810 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:02:04,811 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 21 treesize of output 1 [2023-11-06 23:02:04,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:04,828 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:02:04,829 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 19 treesize of output 1 [2023-11-06 23:02:04,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:04,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:04,869 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:02:04,869 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-06 23:02:04,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:04,885 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:02:04,886 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 21 treesize of output 1 [2023-11-06 23:02:04,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:04,904 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:02:04,904 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 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 23:02:04,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:04,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:04,943 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:02:04,943 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 24 treesize of output 1 [2023-11-06 23:02:04,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:04,959 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:02:04,960 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 19 treesize of output 1 [2023-11-06 23:02:04,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:04,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:05,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:05,027 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:02:05,027 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-06 23:02:05,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:05,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:05,068 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:02:05,068 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-06 23:02:05,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:05,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:05,107 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:02:05,107 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 24 treesize of output 1 [2023-11-06 23:02:05,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:05,138 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 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 23:02:05,195 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:02:05,195 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 14 treesize of output 20 [2023-11-06 23:02:05,285 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 23:02:05,286 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:02:05,286 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:02:05,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140303371] [2023-11-06 23:02:05,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140303371] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:05,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:05,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:02:05,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050303340] [2023-11-06 23:02:05,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:05,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:02:05,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:02:05,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:02:05,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:02:06,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 886 [2023-11-06 23:02:06,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 112 transitions, 556 flow. Second operand has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:06,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:06,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 886 [2023-11-06 23:02:06,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:09,463 INFO L124 PetriNetUnfolderBase]: 14925/21393 cut-off events. [2023-11-06 23:02:09,463 INFO L125 PetriNetUnfolderBase]: For 7258/7258 co-relation queries the response was YES. [2023-11-06 23:02:09,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48755 conditions, 21393 events. 14925/21393 cut-off events. For 7258/7258 co-relation queries the response was YES. Maximal size of possible extension queue 1095. Compared 127425 event pairs, 12729 based on Foata normal form. 0/10561 useless extension candidates. Maximal degree in co-relation 48730. Up to 21393 conditions per place. [2023-11-06 23:02:09,647 INFO L140 encePairwiseOnDemand]: 883/886 looper letters, 109 selfloop transitions, 1 changer transitions 0/110 dead transitions. [2023-11-06 23:02:09,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 110 transitions, 772 flow [2023-11-06 23:02:09,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:09,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:09,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1152 transitions. [2023-11-06 23:02:09,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43340857787810383 [2023-11-06 23:02:09,653 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1152 transitions. [2023-11-06 23:02:09,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1152 transitions. [2023-11-06 23:02:09,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:09,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1152 transitions. [2023-11-06 23:02:09,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 384.0) internal successors, (1152), 3 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:09,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 886.0) internal successors, (3544), 4 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:09,660 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 886.0) internal successors, (3544), 4 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:09,660 INFO L175 Difference]: Start difference. First operand has 96 places, 112 transitions, 556 flow. Second operand 3 states and 1152 transitions. [2023-11-06 23:02:09,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 110 transitions, 772 flow [2023-11-06 23:02:09,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 110 transitions, 756 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 23:02:09,673 INFO L231 Difference]: Finished difference. Result has 95 places, 110 transitions, 538 flow [2023-11-06 23:02:09,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=886, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=538, PETRI_PLACES=95, PETRI_TRANSITIONS=110} [2023-11-06 23:02:09,674 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 14 predicate places. [2023-11-06 23:02:09,674 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 110 transitions, 538 flow [2023-11-06 23:02:09,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:09,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:09,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:09,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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)] Ended with exit code 0 [2023-11-06 23:02:09,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:02:09,888 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:02:09,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:09,889 INFO L85 PathProgramCache]: Analyzing trace with hash 714205561, now seen corresponding path program 1 times [2023-11-06 23:02:09,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:02:09,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887905882] [2023-11-06 23:02:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:09,889 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 23:02:09,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:02:09,890 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:02:09,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:02:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:10,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:02:10,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:10,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:10,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:10,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:10,107 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 23:02:10,144 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:02:10,149 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:02:10,154 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:02:10,175 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:02:10,181 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:02:10,197 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:02:10,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:10,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:10,214 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 23:02:10,234 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:02:10,241 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:02:10,254 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:02:10,272 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:02:10,276 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:02:10,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:10,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:10,293 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 23:02:10,306 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:02:10,324 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:02:10,330 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:02:10,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:10,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:10,348 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 23:02:10,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:10,389 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 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 23:02:10,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:10,423 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 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 23:02:10,548 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 23:02:10,548 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:02:10,548 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:02:10,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887905882] [2023-11-06 23:02:10,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887905882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:10,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:10,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:02:10,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007706781] [2023-11-06 23:02:10,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:10,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:02:10,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:02:10,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:02:10,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:02:11,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 886 [2023-11-06 23:02:11,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 110 transitions, 538 flow. Second operand has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:11,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:11,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 886 [2023-11-06 23:02:11,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:14,255 INFO L124 PetriNetUnfolderBase]: 14258/20376 cut-off events. [2023-11-06 23:02:14,255 INFO L125 PetriNetUnfolderBase]: For 6840/6840 co-relation queries the response was YES. [2023-11-06 23:02:14,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46408 conditions, 20376 events. 14258/20376 cut-off events. For 6840/6840 co-relation queries the response was YES. Maximal size of possible extension queue 1016. Compared 119731 event pairs, 12140 based on Foata normal form. 0/10270 useless extension candidates. Maximal degree in co-relation 46382. Up to 20376 conditions per place. [2023-11-06 23:02:14,422 INFO L140 encePairwiseOnDemand]: 883/886 looper letters, 107 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2023-11-06 23:02:14,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 108 transitions, 750 flow [2023-11-06 23:02:14,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:14,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1162 transitions. [2023-11-06 23:02:14,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43717080511662904 [2023-11-06 23:02:14,428 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1162 transitions. [2023-11-06 23:02:14,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1162 transitions. [2023-11-06 23:02:14,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:14,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1162 transitions. [2023-11-06 23:02:14,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 387.3333333333333) internal successors, (1162), 3 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:14,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 886.0) internal successors, (3544), 4 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:14,437 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 886.0) internal successors, (3544), 4 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:14,437 INFO L175 Difference]: Start difference. First operand has 95 places, 110 transitions, 538 flow. Second operand 3 states and 1162 transitions. [2023-11-06 23:02:14,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 108 transitions, 750 flow [2023-11-06 23:02:14,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 108 transitions, 749 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:02:14,452 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 535 flow [2023-11-06 23:02:14,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=886, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=535, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2023-11-06 23:02:14,453 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 13 predicate places. [2023-11-06 23:02:14,454 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 535 flow [2023-11-06 23:02:14,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:14,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:14,455 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1] [2023-11-06 23:02:14,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:02:14,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:02:14,668 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:02:14,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:14,668 INFO L85 PathProgramCache]: Analyzing trace with hash 2001665365, now seen corresponding path program 1 times [2023-11-06 23:02:14,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:02:14,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845876930] [2023-11-06 23:02:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:14,669 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:02:14,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:02:14,672 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:02:14,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12356e4d-58e0-47ca-885b-d0840991e6cf/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 23:02:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:14,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:02:14,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:14,848 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 23:02:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:15,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:16,879 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:02:16,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845876930] [2023-11-06 23:02:16,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845876930] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:16,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:02:16,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-06 23:02:16,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065497009] [2023-11-06 23:02:16,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:16,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 23:02:16,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:02:16,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 23:02:16,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:02:43,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 886 [2023-11-06 23:02:43,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 535 flow. Second operand has 16 states, 16 states have (on average 344.0625) internal successors, (5505), 16 states have internal predecessors, (5505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:43,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:43,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 886 [2023-11-06 23:02:43,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand