./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.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_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/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_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/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_4f20c3ed-1efa-4888-928e-52394aa5091b/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 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:17:54,998 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:17:55,126 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:17:55,131 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:17:55,132 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:17:55,157 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:17:55,158 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:17:55,159 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:17:55,160 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:17:55,160 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:17:55,161 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:17:55,162 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:17:55,162 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:17:55,163 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:17:55,164 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:17:55,164 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:17:55,165 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:17:55,165 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:17:55,166 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:17:55,166 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:17:55,167 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:17:55,168 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:17:55,169 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:17:55,169 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:17:55,170 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:17:55,170 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:17:55,171 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:17:55,172 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:17:55,172 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:17:55,173 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:17:55,173 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:17:55,174 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:17:55,174 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:17:55,175 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:17:55,175 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:17:55,176 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:17:55,176 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:17:55,177 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:17:55,177 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_4f20c3ed-1efa-4888-928e-52394aa5091b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d [2023-11-06 22:17:55,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:17:55,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:17:55,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:17:55,497 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:17:55,498 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:17:55,499 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2023-11-06 22:17:58,805 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:17:59,113 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:17:59,113 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2023-11-06 22:17:59,126 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/data/89b7e55b0/5ea9ba50f6c34f3bb6c50b9c22fdc306/FLAG9a1c68f7d [2023-11-06 22:17:59,145 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/data/89b7e55b0/5ea9ba50f6c34f3bb6c50b9c22fdc306 [2023-11-06 22:17:59,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:17:59,151 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:17:59,153 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:17:59,153 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:17:59,165 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:17:59,168 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:17:59" (1/1) ... [2023-11-06 22:17:59,169 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55effda0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:59, skipping insertion in model container [2023-11-06 22:17:59,170 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:17:59" (1/1) ... [2023-11-06 22:17:59,208 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:17:59,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:17:59,504 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 22:17:59,505 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@61c5c1b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:59, skipping insertion in model container [2023-11-06 22:17:59,505 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:17:59,506 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 22:17:59,508 INFO L158 Benchmark]: Toolchain (without parser) took 356.20ms. Allocated memory is still 134.2MB. Free memory was 87.4MB in the beginning and 77.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:17:59,509 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 134.2MB. Free memory is still 80.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:17:59,510 INFO L158 Benchmark]: CACSL2BoogieTranslator took 352.72ms. Allocated memory is still 134.2MB. Free memory was 87.1MB in the beginning and 77.0MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:17:59,513 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 134.2MB. Free memory is still 80.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 352.72ms. Allocated memory is still 134.2MB. Free memory was 87.1MB in the beginning and 77.0MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 151]: 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_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/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_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/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_4f20c3ed-1efa-4888-928e-52394aa5091b/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 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:18:02,316 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:18:02,414 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 22:18:02,419 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:18:02,424 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:18:02,472 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:18:02,473 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:18:02,474 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:18:02,475 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:18:02,481 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:18:02,482 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:18:02,482 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:18:02,483 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:18:02,485 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:18:02,485 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:18:02,486 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:18:02,486 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:18:02,486 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:18:02,487 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:18:02,488 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:18:02,489 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:18:02,489 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:18:02,490 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:18:02,490 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 22:18:02,490 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 22:18:02,491 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:18:02,491 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:18:02,492 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:18:02,493 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:18:02,493 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:18:02,495 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:18:02,495 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:18:02,496 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:18:02,496 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:18:02,497 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 22:18:02,497 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 22:18:02,497 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:18:02,497 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:18:02,498 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:18:02,499 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 22:18:02,499 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:18:02,500 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_4f20c3ed-1efa-4888-928e-52394aa5091b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d [2023-11-06 22:18:02,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:18:02,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:18:02,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:18:02,960 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:18:02,961 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:18:02,962 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2023-11-06 22:18:06,781 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:18:07,078 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:18:07,078 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2023-11-06 22:18:07,091 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/data/7898dc5fa/a4f6e95d3185452d8288c6c7b98a639e/FLAG736508feb [2023-11-06 22:18:07,108 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/data/7898dc5fa/a4f6e95d3185452d8288c6c7b98a639e [2023-11-06 22:18:07,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:18:07,113 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:18:07,115 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:18:07,115 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:18:07,121 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:18:07,122 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:18:07" (1/1) ... [2023-11-06 22:18:07,124 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ba3273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:07, skipping insertion in model container [2023-11-06 22:18:07,124 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:18:07" (1/1) ... [2023-11-06 22:18:07,161 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:18:07,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:18:07,528 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 22:18:07,534 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:18:07,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:18:07,578 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:18:07,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:18:07,689 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:18:07,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:07 WrapperNode [2023-11-06 22:18:07,689 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:18:07,691 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:18:07,691 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:18:07,691 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:18:07,700 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:07" (1/1) ... [2023-11-06 22:18:07,716 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:07" (1/1) ... [2023-11-06 22:18:07,765 INFO L138 Inliner]: procedures = 28, calls = 45, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 299 [2023-11-06 22:18:07,765 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:18:07,766 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:18:07,766 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:18:07,767 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:18:07,777 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:07" (1/1) ... [2023-11-06 22:18:07,782 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:07" (1/1) ... [2023-11-06 22:18:07,791 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:07" (1/1) ... [2023-11-06 22:18:07,791 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:07" (1/1) ... [2023-11-06 22:18:07,805 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:07" (1/1) ... [2023-11-06 22:18:07,811 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:07" (1/1) ... [2023-11-06 22:18:07,814 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:07" (1/1) ... [2023-11-06 22:18:07,817 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:07" (1/1) ... [2023-11-06 22:18:07,823 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:18:07,824 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:18:07,825 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:18:07,825 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:18:07,826 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:07" (1/1) ... [2023-11-06 22:18:07,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:18:07,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:07,870 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:18:07,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:18:07,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:18:07,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 22:18:07,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:18:07,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 22:18:07,909 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:18:07,910 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:18:07,910 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:18:07,910 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:18:07,910 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:18:07,910 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:18:07,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:18:07,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:18:07,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:18:07,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:18:07,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 22:18:07,913 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 22:18:08,079 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:18:08,081 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:18:09,003 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:18:09,023 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:18:09,024 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 22:18:09,035 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:18:09 BoogieIcfgContainer [2023-11-06 22:18:09,035 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:18:09,039 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:18:09,039 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:18:09,042 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:18:09,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:18:07" (1/3) ... [2023-11-06 22:18:09,044 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aad9151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:18:09, skipping insertion in model container [2023-11-06 22:18:09,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:07" (2/3) ... [2023-11-06 22:18:09,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aad9151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:18:09, skipping insertion in model container [2023-11-06 22:18:09,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:18:09" (3/3) ... [2023-11-06 22:18:09,050 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2023-11-06 22:18:09,072 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:18:09,073 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-11-06 22:18:09,073 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:18:09,321 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:18:09,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 383 places, 399 transitions, 819 flow [2023-11-06 22:18:09,677 INFO L124 PetriNetUnfolderBase]: 26/396 cut-off events. [2023-11-06 22:18:09,678 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:18:09,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 396 events. 26/396 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1012 event pairs, 0 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 284. Up to 2 conditions per place. [2023-11-06 22:18:09,700 INFO L82 GeneralOperation]: Start removeDead. Operand has 383 places, 399 transitions, 819 flow [2023-11-06 22:18:09,734 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 375 places, 391 transitions, 800 flow [2023-11-06 22:18:09,739 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:18:09,751 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 375 places, 391 transitions, 800 flow [2023-11-06 22:18:09,754 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 375 places, 391 transitions, 800 flow [2023-11-06 22:18:09,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 375 places, 391 transitions, 800 flow [2023-11-06 22:18:09,857 INFO L124 PetriNetUnfolderBase]: 26/391 cut-off events. [2023-11-06 22:18:09,857 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:18:09,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 391 events. 26/391 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1013 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 284. Up to 2 conditions per place. [2023-11-06 22:18:09,887 INFO L119 LiptonReduction]: Number of co-enabled transitions 38880 [2023-11-06 22:18:48,362 WARN L293 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 124 DAG size of output: 123 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-06 22:18:49,305 INFO L134 LiptonReduction]: Checked pairs total: 35564 [2023-11-06 22:18:49,305 INFO L136 LiptonReduction]: Total number of compositions: 465 [2023-11-06 22:18:49,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:18:49,330 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;@6ea288f2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:18:49,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-11-06 22:18:49,333 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:18:49,333 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:18:49,334 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:18:49,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:49,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:18:49,335 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:18:49,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:49,342 INFO L85 PathProgramCache]: Analyzing trace with hash 51729, now seen corresponding path program 1 times [2023-11-06 22:18:49,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:18:49,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53468312] [2023-11-06 22:18:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:49,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:18:49,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:18:49,372 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:18:49,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-06 22:18:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:49,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:18:49,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:49,710 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:18:49,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:49,734 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:49,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:49,767 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:49,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:49,781 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:49,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:49,791 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 6 treesize of output 1 [2023-11-06 22:18:49,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:49,802 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:49,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:49,820 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:49,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:49,829 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 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:49,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:49,840 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:49,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:49,849 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:49,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:49,868 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:49,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:49,888 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:49,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:49,907 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:49,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:49,919 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:49,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:49,943 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:49,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:49,955 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:49,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:49,976 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:49,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:49,984 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 6 treesize of output 1 [2023-11-06 22:18:50,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:50,024 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 16 treesize of output 1 [2023-11-06 22:18:50,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:50,035 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:50,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:50,059 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:50,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:50,085 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:50,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:50,113 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:50,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:50,145 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:18:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:50,153 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:50,172 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:18:50,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53468312] [2023-11-06 22:18:50,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53468312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:50,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:50,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:18:50,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287346794] [2023-11-06 22:18:50,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:50,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:18:50,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:18:50,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:18:50,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:18:50,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 864 [2023-11-06 22:18:50,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 365.6666666666667) internal successors, (1097), 3 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:50,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:50,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 864 [2023-11-06 22:18:50,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:51,228 INFO L124 PetriNetUnfolderBase]: 1817/2564 cut-off events. [2023-11-06 22:18:51,228 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2023-11-06 22:18:51,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5226 conditions, 2564 events. 1817/2564 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10276 event pairs, 1428 based on Foata normal form. 0/1026 useless extension candidates. Maximal degree in co-relation 4490. Up to 2562 conditions per place. [2023-11-06 22:18:51,252 INFO L140 encePairwiseOnDemand]: 858/864 looper letters, 39 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2023-11-06 22:18:51,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 190 flow [2023-11-06 22:18:51,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:18:51,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:18:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1140 transitions. [2023-11-06 22:18:51,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4398148148148148 [2023-11-06 22:18:51,283 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1140 transitions. [2023-11-06 22:18:51,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1140 transitions. [2023-11-06 22:18:51,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:51,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1140 transitions. [2023-11-06 22:18:51,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 380.0) internal successors, (1140), 3 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:51,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 864.0) internal successors, (3456), 4 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:51,317 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 864.0) internal successors, (3456), 4 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:51,319 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 108 flow. Second operand 3 states and 1140 transitions. [2023-11-06 22:18:51,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 190 flow [2023-11-06 22:18:51,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 178 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 22:18:51,331 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 100 flow [2023-11-06 22:18:51,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-11-06 22:18:51,344 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-11-06 22:18:51,344 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 100 flow [2023-11-06 22:18:51,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 365.6666666666667) internal successors, (1097), 3 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:51,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:51,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:18:51,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:51,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:18:51,558 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:18:51,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:51,569 INFO L85 PathProgramCache]: Analyzing trace with hash 51730, now seen corresponding path program 1 times [2023-11-06 22:18:51,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:18:51,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697949307] [2023-11-06 22:18:51,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:51,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:18:51,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:18:51,574 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:18:51,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-06 22:18:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:51,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:18:51,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:51,720 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-06 22:18:51,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:51,745 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:51,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:51,768 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:51,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:51,778 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:51,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:51,791 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:51,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:51,809 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:51,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:51,831 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:51,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:51,842 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:51,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:51,854 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:51,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:51,861 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:51,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:51,893 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:51,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:51,901 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:51,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:51,915 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:51,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:51,921 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:51,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:51,930 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:51,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:51,940 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 11 treesize of output 1 [2023-11-06 22:18:51,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:51,952 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 22:18:51,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:51,972 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:51,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:51,996 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:52,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:52,008 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:52,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:52,020 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:52,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:52,028 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:52,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:52,040 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:52,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:52,047 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:52,060 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:52,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:18:52,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697949307] [2023-11-06 22:18:52,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697949307] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:52,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:52,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:18:52,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922197914] [2023-11-06 22:18:52,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:52,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:18:52,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:18:52,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:18:52,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:18:52,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 864 [2023-11-06 22:18:52,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 363.6666666666667) internal successors, (1091), 3 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:52,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:52,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 864 [2023-11-06 22:18:52,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:53,040 INFO L124 PetriNetUnfolderBase]: 1820/2568 cut-off events. [2023-11-06 22:18:53,041 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-06 22:18:53,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5177 conditions, 2568 events. 1820/2568 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10283 event pairs, 1428 based on Foata normal form. 0/1029 useless extension candidates. Maximal degree in co-relation 5147. Up to 2568 conditions per place. [2023-11-06 22:18:53,078 INFO L140 encePairwiseOnDemand]: 858/864 looper letters, 42 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2023-11-06 22:18:53,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 208 flow [2023-11-06 22:18:53,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:18:53,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:18:53,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1137 transitions. [2023-11-06 22:18:53,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4386574074074074 [2023-11-06 22:18:53,085 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1137 transitions. [2023-11-06 22:18:53,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1137 transitions. [2023-11-06 22:18:53,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:53,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1137 transitions. [2023-11-06 22:18:53,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 379.0) internal successors, (1137), 3 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:53,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 864.0) internal successors, (3456), 4 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:53,104 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 864.0) internal successors, (3456), 4 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:53,104 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 100 flow. Second operand 3 states and 1137 transitions. [2023-11-06 22:18:53,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 208 flow [2023-11-06 22:18:53,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 194 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:18:53,107 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 125 flow [2023-11-06 22:18:53,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2023-11-06 22:18:53,108 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2023-11-06 22:18:53,109 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 125 flow [2023-11-06 22:18:53,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 363.6666666666667) internal successors, (1091), 3 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:53,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:53,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:18:53,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:53,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:18:53,323 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:18:53,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:53,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1608867, now seen corresponding path program 1 times [2023-11-06 22:18:53,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:18:53,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363111977] [2023-11-06 22:18:53,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:53,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:18:53,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:18:53,326 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:18:53,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-06 22:18:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:53,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:18:53,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:53,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:53,532 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:18:53,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363111977] [2023-11-06 22:18:53,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363111977] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:53,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:18:53,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 22:18:53,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983725200] [2023-11-06 22:18:53,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:53,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:18:53,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:18:53,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:18:53,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:18:53,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 864 [2023-11-06 22:18:53,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 125 flow. Second operand has 6 states, 6 states have (on average 366.0) internal successors, (2196), 6 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:53,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:53,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 864 [2023-11-06 22:18:53,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:54,835 INFO L124 PetriNetUnfolderBase]: 1818/2569 cut-off events. [2023-11-06 22:18:54,835 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-06 22:18:54,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5185 conditions, 2569 events. 1818/2569 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10333 event pairs, 1428 based on Foata normal form. 0/1029 useless extension candidates. Maximal degree in co-relation 5174. Up to 2564 conditions per place. [2023-11-06 22:18:54,856 INFO L140 encePairwiseOnDemand]: 858/864 looper letters, 43 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-11-06 22:18:54,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 222 flow [2023-11-06 22:18:54,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:54,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:18:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1882 transitions. [2023-11-06 22:18:54,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356481481481482 [2023-11-06 22:18:54,866 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1882 transitions. [2023-11-06 22:18:54,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1882 transitions. [2023-11-06 22:18:54,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:54,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1882 transitions. [2023-11-06 22:18:54,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 376.4) internal successors, (1882), 5 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:54,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 864.0) internal successors, (5184), 6 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:54,891 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 864.0) internal successors, (5184), 6 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:54,892 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 125 flow. Second operand 5 states and 1882 transitions. [2023-11-06 22:18:54,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 222 flow [2023-11-06 22:18:54,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 48 transitions, 218 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:18:54,895 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 152 flow [2023-11-06 22:18:54,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-11-06 22:18:54,896 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-11-06 22:18:54,896 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 152 flow [2023-11-06 22:18:54,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 366.0) internal successors, (2196), 6 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:54,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:54,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:18:54,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:55,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:18:55,110 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:18:55,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:55,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1608705, now seen corresponding path program 1 times [2023-11-06 22:18:55,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:18:55,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419799583] [2023-11-06 22:18:55,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:55,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:18:55,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:18:55,113 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:18:55,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-06 22:18:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:55,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:18:55,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:55,256 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-06 22:18:55,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,287 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:55,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,313 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:55,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,329 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 11 treesize of output 1 [2023-11-06 22:18:55,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,345 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:55,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,369 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:55,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,425 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:55,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,451 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:55,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,470 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:55,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,480 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:55,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,492 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:55,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,508 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:55,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,528 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:55,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,536 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:55,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,545 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:55,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,557 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:55,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,572 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:55,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,600 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:55,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,611 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:55,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,622 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:55,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,632 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:55,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,643 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:55,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,659 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:55,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:55,683 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:55,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:55,891 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:18:55,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419799583] [2023-11-06 22:18:55,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [419799583] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:55,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:18:55,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 22:18:55,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371368593] [2023-11-06 22:18:55,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:55,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:18:55,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:18:55,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:18:55,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:18:57,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 361 out of 864 [2023-11-06 22:18:57,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 152 flow. Second operand has 6 states, 6 states have (on average 362.0) internal successors, (2172), 6 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:57,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:57,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 361 of 864 [2023-11-06 22:18:57,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:58,187 INFO L124 PetriNetUnfolderBase]: 1817/2567 cut-off events. [2023-11-06 22:18:58,188 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-06 22:18:58,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5195 conditions, 2567 events. 1817/2567 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10355 event pairs, 1428 based on Foata normal form. 2/1033 useless extension candidates. Maximal degree in co-relation 5162. Up to 2565 conditions per place. [2023-11-06 22:18:58,209 INFO L140 encePairwiseOnDemand]: 861/864 looper letters, 42 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-11-06 22:18:58,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 46 transitions, 238 flow [2023-11-06 22:18:58,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:58,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:18:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1853 transitions. [2023-11-06 22:18:58,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289351851851852 [2023-11-06 22:18:58,218 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1853 transitions. [2023-11-06 22:18:58,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1853 transitions. [2023-11-06 22:18:58,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:58,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1853 transitions. [2023-11-06 22:18:58,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 370.6) internal successors, (1853), 5 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:58,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 864.0) internal successors, (5184), 6 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:58,240 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 864.0) internal successors, (5184), 6 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:58,240 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 152 flow. Second operand 5 states and 1853 transitions. [2023-11-06 22:18:58,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 46 transitions, 238 flow [2023-11-06 22:18:58,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 46 transitions, 227 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-06 22:18:58,243 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 143 flow [2023-11-06 22:18:58,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=143, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2023-11-06 22:18:58,244 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-11-06 22:18:58,244 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 143 flow [2023-11-06 22:18:58,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 362.0) internal successors, (2172), 6 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:58,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:58,247 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2023-11-06 22:18:58,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:58,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:18:58,458 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:18:58,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:58,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1546127905, now seen corresponding path program 2 times [2023-11-06 22:18:58,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:18:58,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830346658] [2023-11-06 22:18:58,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:18:58,459 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:18:58,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:18:58,460 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:18:58,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-06 22:18:58,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:18:58,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:58,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:18:58,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:58,587 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:18:58,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,608 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:58,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,619 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:58,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,626 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:58,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,634 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:58,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,643 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:58,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,680 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:18:58,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,699 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:58,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,712 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:58,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,731 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:58,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,752 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:58,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,763 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:58,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,773 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:58,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,783 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:58,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,795 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:58,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,815 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:58,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,826 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:58,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,833 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:58,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,846 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:58,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,853 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:58,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,873 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:18:58,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:58,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,894 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:18:58,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:58,902 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:18:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:59,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:59,585 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:18:59,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830346658] [2023-11-06 22:18:59,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830346658] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:59,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:18:59,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:18:59,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745284669] [2023-11-06 22:18:59,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:59,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:18:59,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:18:59,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:18:59,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:19:03,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 358 out of 864 [2023-11-06 22:19:03,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 143 flow. Second operand has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:03,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:03,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 358 of 864 [2023-11-06 22:19:03,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:05,264 INFO L124 PetriNetUnfolderBase]: 1816/2565 cut-off events. [2023-11-06 22:19:05,264 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-06 22:19:05,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5186 conditions, 2565 events. 1816/2565 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10272 event pairs, 1428 based on Foata normal form. 2/1031 useless extension candidates. Maximal degree in co-relation 5162. Up to 2562 conditions per place. [2023-11-06 22:19:05,295 INFO L140 encePairwiseOnDemand]: 858/864 looper letters, 37 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2023-11-06 22:19:05,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 44 transitions, 218 flow [2023-11-06 22:19:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:19:05,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:19:05,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2194 transitions. [2023-11-06 22:19:05,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42322530864197533 [2023-11-06 22:19:05,310 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2194 transitions. [2023-11-06 22:19:05,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2194 transitions. [2023-11-06 22:19:05,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:05,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2194 transitions. [2023-11-06 22:19:05,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 365.6666666666667) internal successors, (2194), 6 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:05,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 864.0) internal successors, (6048), 7 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:05,339 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 864.0) internal successors, (6048), 7 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:05,340 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 143 flow. Second operand 6 states and 2194 transitions. [2023-11-06 22:19:05,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 44 transitions, 218 flow [2023-11-06 22:19:05,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 44 transitions, 206 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-06 22:19:05,343 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 132 flow [2023-11-06 22:19:05,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=132, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-11-06 22:19:05,345 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-11-06 22:19:05,345 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 132 flow [2023-11-06 22:19:05,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:05,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:05,348 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2023-11-06 22:19:05,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:05,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:05,562 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:19:05,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:05,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1546128067, now seen corresponding path program 2 times [2023-11-06 22:19:05,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:19:05,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646993231] [2023-11-06 22:19:05,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:19:05,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:05,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:19:05,565 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:19:05,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-06 22:19:05,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:19:05,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:05,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:19:05,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:05,738 INFO L322 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2023-11-06 22:19:05,739 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 40 [2023-11-06 22:19:05,845 INFO L322 Elim1Store]: treesize reduction 103, result has 12.7 percent of original size [2023-11-06 22:19:05,845 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 40 [2023-11-06 22:19:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:06,115 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:19:06,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:19:06,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646993231] [2023-11-06 22:19:06,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646993231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:19:06,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:19:06,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:19:06,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055421957] [2023-11-06 22:19:06,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:19:06,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:19:06,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:19:06,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:19:06,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:19:06,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 864 [2023-11-06 22:19:06,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 366.0) internal successors, (1098), 3 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:06,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:06,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 864 [2023-11-06 22:19:06,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:07,007 INFO L124 PetriNetUnfolderBase]: 1441/2064 cut-off events. [2023-11-06 22:19:07,007 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-06 22:19:07,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4180 conditions, 2064 events. 1441/2064 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8052 event pairs, 1128 based on Foata normal form. 0/879 useless extension candidates. Maximal degree in co-relation 4147. Up to 2064 conditions per place. [2023-11-06 22:19:07,019 INFO L140 encePairwiseOnDemand]: 861/864 looper letters, 41 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-11-06 22:19:07,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 204 flow [2023-11-06 22:19:07,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:19:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:19:07,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1137 transitions. [2023-11-06 22:19:07,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4386574074074074 [2023-11-06 22:19:07,025 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1137 transitions. [2023-11-06 22:19:07,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1137 transitions. [2023-11-06 22:19:07,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:07,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1137 transitions. [2023-11-06 22:19:07,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 379.0) internal successors, (1137), 3 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:07,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 864.0) internal successors, (3456), 4 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:07,037 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 864.0) internal successors, (3456), 4 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:07,038 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 132 flow. Second operand 3 states and 1137 transitions. [2023-11-06 22:19:07,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 204 flow [2023-11-06 22:19:07,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 174 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-11-06 22:19:07,040 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 92 flow [2023-11-06 22:19:07,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-11-06 22:19:07,041 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-11-06 22:19:07,041 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 92 flow [2023-11-06 22:19:07,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 366.0) internal successors, (1098), 3 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:07,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:07,043 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2023-11-06 22:19:07,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:07,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:07,254 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:19:07,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:07,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1546128069, now seen corresponding path program 1 times [2023-11-06 22:19:07,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:19:07,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354150584] [2023-11-06 22:19:07,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:07,255 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:07,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:19:07,256 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:19:07,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-06 22:19:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:07,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:19:07,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:07,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:07,419 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-11-06 22:19:07,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:07,426 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-06 22:19:07,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:07,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:07,444 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2023-11-06 22:19:07,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:07,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:07,456 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-06 22:19:07,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:07,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:07,477 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 14 treesize of output 11 [2023-11-06 22:19:07,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:07,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:07,489 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-06 22:19:07,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:07,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:07,552 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-06 22:19:07,552 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-06 22:19:07,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:07,575 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-06 22:19:07,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:07,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:07,648 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:19:07,648 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 1 case distinctions, treesize of input 14 treesize of output 11 [2023-11-06 22:19:07,659 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 22:19:07,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:07,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:07,684 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 9 treesize of output 11 [2023-11-06 22:19:07,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:07,696 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-06 22:19:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:07,913 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:19:07,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:19:07,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354150584] [2023-11-06 22:19:07,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354150584] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:19:07,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:19:07,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:19:07,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646684751] [2023-11-06 22:19:07,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:19:07,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:19:07,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:19:07,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:19:07,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:19:08,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 364 out of 864 [2023-11-06 22:19:08,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 365.0) internal successors, (1095), 3 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:08,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:08,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 364 of 864 [2023-11-06 22:19:08,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:08,809 INFO L124 PetriNetUnfolderBase]: 1066/1563 cut-off events. [2023-11-06 22:19:08,809 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-06 22:19:08,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3161 conditions, 1563 events. 1066/1563 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5863 event pairs, 828 based on Foata normal form. 0/729 useless extension candidates. Maximal degree in co-relation 3155. Up to 1563 conditions per place. [2023-11-06 22:19:08,821 INFO L140 encePairwiseOnDemand]: 861/864 looper letters, 39 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-11-06 22:19:08,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 168 flow [2023-11-06 22:19:08,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:19:08,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:19:08,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1132 transitions. [2023-11-06 22:19:08,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367283950617284 [2023-11-06 22:19:08,829 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1132 transitions. [2023-11-06 22:19:08,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1132 transitions. [2023-11-06 22:19:08,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:08,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1132 transitions. [2023-11-06 22:19:08,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 377.3333333333333) internal successors, (1132), 3 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:08,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 864.0) internal successors, (3456), 4 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:08,845 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 864.0) internal successors, (3456), 4 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:08,845 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 92 flow. Second operand 3 states and 1132 transitions. [2023-11-06 22:19:08,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 168 flow [2023-11-06 22:19:08,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 167 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:19:08,848 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 89 flow [2023-11-06 22:19:08,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-11-06 22:19:08,849 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -7 predicate places. [2023-11-06 22:19:08,849 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 89 flow [2023-11-06 22:19:08,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 365.0) internal successors, (1095), 3 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:08,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:08,851 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2023-11-06 22:19:08,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:09,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:09,073 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:19:09,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:09,074 INFO L85 PathProgramCache]: Analyzing trace with hash -229574699, now seen corresponding path program 1 times [2023-11-06 22:19:09,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:19:09,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245091343] [2023-11-06 22:19:09,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:09,075 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:09,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:19:09,077 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:19:09,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-06 22:19:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:09,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:19:09,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:09,303 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 22:19:09,303 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-06 22:19:09,333 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:19:09,334 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-06 22:19:09,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:09,378 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 22:19:09,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-06 22:19:09,405 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:19:09,406 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2023-11-06 22:19:09,449 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 22:19:09,449 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2023-11-06 22:19:09,477 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:19:09,477 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2023-11-06 22:19:09,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:09,527 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:19:09,527 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-06 22:19:09,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:09,593 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 22:19:09,593 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-06 22:19:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:10,048 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:19:10,048 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:19:10,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245091343] [2023-11-06 22:19:10,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245091343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:19:10,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:19:10,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:19:10,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556129845] [2023-11-06 22:19:10,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:19:10,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:19:10,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:19:10,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:19:10,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:19:10,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 362 out of 864 [2023-11-06 22:19:10,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 363.6666666666667) internal successors, (1091), 3 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:10,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:10,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 362 of 864 [2023-11-06 22:19:10,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:10,829 INFO L124 PetriNetUnfolderBase]: 1011/1478 cut-off events. [2023-11-06 22:19:10,829 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-06 22:19:10,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2992 conditions, 1478 events. 1011/1478 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5503 event pairs, 784 based on Foata normal form. 0/707 useless extension candidates. Maximal degree in co-relation 2985. Up to 1478 conditions per place. [2023-11-06 22:19:10,838 INFO L140 encePairwiseOnDemand]: 861/864 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-11-06 22:19:10,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 38 transitions, 161 flow [2023-11-06 22:19:10,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:19:10,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:19:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1124 transitions. [2023-11-06 22:19:10,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43364197530864196 [2023-11-06 22:19:10,847 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1124 transitions. [2023-11-06 22:19:10,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1124 transitions. [2023-11-06 22:19:10,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:10,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1124 transitions. [2023-11-06 22:19:10,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:10,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 864.0) internal successors, (3456), 4 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:10,860 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 864.0) internal successors, (3456), 4 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:10,861 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 89 flow. Second operand 3 states and 1124 transitions. [2023-11-06 22:19:10,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 38 transitions, 161 flow [2023-11-06 22:19:10,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 38 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:19:10,863 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 86 flow [2023-11-06 22:19:10,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-11-06 22:19:10,864 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -8 predicate places. [2023-11-06 22:19:10,865 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 86 flow [2023-11-06 22:19:10,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 363.6666666666667) internal successors, (1091), 3 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:10,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:10,866 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2023-11-06 22:19:10,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-06 22:19:11,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:11,081 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:19:11,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:11,081 INFO L85 PathProgramCache]: Analyzing trace with hash -229574701, now seen corresponding path program 1 times [2023-11-06 22:19:11,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:19:11,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961148309] [2023-11-06 22:19:11,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:11,082 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:11,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:19:11,083 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:19:11,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-06 22:19:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:11,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:19:11,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:11,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:11,314 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-06 22:19:11,315 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 22:19:11,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:11,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:11,353 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 9 treesize of output 11 [2023-11-06 22:19:11,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:11,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:11,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:11,436 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:19:11,436 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 1 case distinctions, treesize of input 19 treesize of output 11 [2023-11-06 22:19:11,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:11,456 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 22:19:11,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:11,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:11,490 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 22:19:11,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:11,541 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:19:11,541 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 1 case distinctions, treesize of input 14 treesize of output 11 [2023-11-06 22:19:11,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:11,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:11,600 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:19:11,601 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2023-11-06 22:19:11,611 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 22:19:11,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:11,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:11,637 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 9 treesize of output 11 [2023-11-06 22:19:11,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:11,646 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-06 22:19:11,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:11,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:11,673 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 9 treesize of output 11 [2023-11-06 22:19:11,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:11,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:11,703 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 22:19:11,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:11,748 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 22:19:11,749 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 1 case distinctions, treesize of input 14 treesize of output 11 [2023-11-06 22:19:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:12,022 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:19:12,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:19:12,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961148309] [2023-11-06 22:19:12,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961148309] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:19:12,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:19:12,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:19:12,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85230323] [2023-11-06 22:19:12,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:19:12,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:19:12,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:19:12,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:19:12,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:19:12,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 364 out of 864 [2023-11-06 22:19:12,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 365.6666666666667) internal successors, (1097), 3 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:12,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:12,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 364 of 864 [2023-11-06 22:19:12,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:12,897 INFO L124 PetriNetUnfolderBase]: 956/1393 cut-off events. [2023-11-06 22:19:12,897 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-06 22:19:12,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2823 conditions, 1393 events. 956/1393 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5107 event pairs, 740 based on Foata normal form. 0/685 useless extension candidates. Maximal degree in co-relation 2815. Up to 1393 conditions per place. [2023-11-06 22:19:12,905 INFO L140 encePairwiseOnDemand]: 861/864 looper letters, 35 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-11-06 22:19:12,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 36 transitions, 154 flow [2023-11-06 22:19:12,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:19:12,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:19:12,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1128 transitions. [2023-11-06 22:19:12,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4351851851851852 [2023-11-06 22:19:12,912 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1128 transitions. [2023-11-06 22:19:12,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1128 transitions. [2023-11-06 22:19:12,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:12,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1128 transitions. [2023-11-06 22:19:12,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 376.0) internal successors, (1128), 3 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:12,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 864.0) internal successors, (3456), 4 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:12,926 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 864.0) internal successors, (3456), 4 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:12,927 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 86 flow. Second operand 3 states and 1128 transitions. [2023-11-06 22:19:12,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 36 transitions, 154 flow [2023-11-06 22:19:12,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 36 transitions, 153 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:19:12,929 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 83 flow [2023-11-06 22:19:12,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2023-11-06 22:19:12,930 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -9 predicate places. [2023-11-06 22:19:12,930 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 83 flow [2023-11-06 22:19:12,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 365.6666666666667) internal successors, (1097), 3 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:12,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:12,931 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2023-11-06 22:19:12,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:13,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:13,153 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:19:13,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:13,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1473121316, now seen corresponding path program 1 times [2023-11-06 22:19:13,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:19:13,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853537179] [2023-11-06 22:19:13,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:13,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:13,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:19:13,155 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:19:13,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-06 22:19:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:13,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:19:13,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:13,325 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:19:13,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,338 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:13,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,357 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:13,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,378 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:13,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,389 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:13,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,396 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:13,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,415 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:13,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,441 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:13,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,455 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:13,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,477 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:13,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,516 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:19:13,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,540 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:13,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,554 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:13,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,575 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:13,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,583 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:13,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,592 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:13,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,605 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:13,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,612 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:13,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,623 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:13,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,634 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:13,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,647 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:13,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,670 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:13,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,678 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:13,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:13,688 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:13,789 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:19:13,789 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:19:13,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853537179] [2023-11-06 22:19:13,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853537179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:19:13,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:19:13,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:19:13,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866101475] [2023-11-06 22:19:13,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:19:13,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:19:13,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:19:13,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:19:13,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:19:14,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 864 [2023-11-06 22:19:14,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 83 flow. Second operand has 5 states, 5 states have (on average 360.2) internal successors, (1801), 5 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:14,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:14,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 864 [2023-11-06 22:19:14,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:15,224 INFO L124 PetriNetUnfolderBase]: 1577/2302 cut-off events. [2023-11-06 22:19:15,224 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-06 22:19:15,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4660 conditions, 2302 events. 1577/2302 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10185 event pairs, 740 based on Foata normal form. 0/1122 useless extension candidates. Maximal degree in co-relation 4651. Up to 1389 conditions per place. [2023-11-06 22:19:15,236 INFO L140 encePairwiseOnDemand]: 859/864 looper letters, 60 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-11-06 22:19:15,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 64 transitions, 272 flow [2023-11-06 22:19:15,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:19:15,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:19:15,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1858 transitions. [2023-11-06 22:19:15,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4300925925925926 [2023-11-06 22:19:15,244 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1858 transitions. [2023-11-06 22:19:15,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1858 transitions. [2023-11-06 22:19:15,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:15,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1858 transitions. [2023-11-06 22:19:15,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 371.6) internal successors, (1858), 5 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:15,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 864.0) internal successors, (5184), 6 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:15,260 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 864.0) internal successors, (5184), 6 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:15,261 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 83 flow. Second operand 5 states and 1858 transitions. [2023-11-06 22:19:15,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 64 transitions, 272 flow [2023-11-06 22:19:15,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 64 transitions, 271 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:19:15,263 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 98 flow [2023-11-06 22:19:15,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2023-11-06 22:19:15,264 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2023-11-06 22:19:15,264 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 98 flow [2023-11-06 22:19:15,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 360.2) internal successors, (1801), 5 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:15,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:15,266 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2023-11-06 22:19:15,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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)] Ended with exit code 0 [2023-11-06 22:19:15,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:15,478 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:19:15,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:15,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1473121315, now seen corresponding path program 1 times [2023-11-06 22:19:15,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:19:15,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399303421] [2023-11-06 22:19:15,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:15,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:15,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:19:15,480 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:19:15,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-06 22:19:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:15,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:19:15,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:15,609 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:19:15,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,623 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:15,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,630 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:15,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,634 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:15,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,641 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:15,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,645 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:15,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,655 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:15,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,660 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:15,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,669 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:15,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,674 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:15,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,683 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:15,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,698 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:15,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,717 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:15,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,726 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:15,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,736 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:15,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,752 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:15,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,778 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:19:15,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,791 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:15,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,798 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:15,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,825 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:15,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,832 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:15,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,836 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:15,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,844 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:15,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:15,849 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:15,875 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:19:15,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:19:15,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399303421] [2023-11-06 22:19:15,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399303421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:19:15,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:19:15,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:19:15,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102959126] [2023-11-06 22:19:15,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:19:15,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:19:15,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:19:15,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:19:15,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:19:16,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 357 out of 864 [2023-11-06 22:19:16,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 358.5) internal successors, (1434), 4 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:16,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:16,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 357 of 864 [2023-11-06 22:19:16,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:16,532 INFO L124 PetriNetUnfolderBase]: 845/1250 cut-off events. [2023-11-06 22:19:16,532 INFO L125 PetriNetUnfolderBase]: For 269/269 co-relation queries the response was YES. [2023-11-06 22:19:16,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2791 conditions, 1250 events. 845/1250 cut-off events. For 269/269 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4506 event pairs, 635 based on Foata normal form. 0/816 useless extension candidates. Maximal degree in co-relation 2780. Up to 1246 conditions per place. [2023-11-06 22:19:16,539 INFO L140 encePairwiseOnDemand]: 859/864 looper letters, 32 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-11-06 22:19:16,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 34 transitions, 160 flow [2023-11-06 22:19:16,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:19:16,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:19:16,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1462 transitions. [2023-11-06 22:19:16,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230324074074074 [2023-11-06 22:19:16,546 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1462 transitions. [2023-11-06 22:19:16,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1462 transitions. [2023-11-06 22:19:16,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:16,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1462 transitions. [2023-11-06 22:19:16,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 365.5) internal successors, (1462), 4 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:16,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 864.0) internal successors, (4320), 5 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:16,558 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 864.0) internal successors, (4320), 5 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:16,559 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 98 flow. Second operand 4 states and 1462 transitions. [2023-11-06 22:19:16,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 34 transitions, 160 flow [2023-11-06 22:19:16,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 34 transitions, 154 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:19:16,561 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 90 flow [2023-11-06 22:19:16,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-11-06 22:19:16,561 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -8 predicate places. [2023-11-06 22:19:16,562 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 90 flow [2023-11-06 22:19:16,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 358.5) internal successors, (1434), 4 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:16,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:16,562 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:16,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:16,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:16,777 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:19:16,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:16,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1577877315, now seen corresponding path program 1 times [2023-11-06 22:19:16,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:19:16,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052306497] [2023-11-06 22:19:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:16,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:16,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:19:16,780 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:19:16,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-06 22:19:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:16,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:19:16,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:16,939 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:19:16,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:16,947 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:16,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:16,963 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:16,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:16,972 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:16,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:16,978 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:16,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:16,986 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:16,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:16,993 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:17,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:17,001 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:17,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:17,011 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:17,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:17,027 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:17,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:17,033 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:17,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:17,040 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:17,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:17,051 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:17,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:17,067 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:17,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:17,073 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:17,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:17,080 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:17,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:17,088 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:17,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:17,093 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:17,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:17,123 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:19:17,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:17,140 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 22:19:17,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:17,159 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:17,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:17,167 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:17,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:17,178 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:17,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:17,195 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:17,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:17,646 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:19:17,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052306497] [2023-11-06 22:19:17,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052306497] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:17,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:19:17,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:19:17,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829745854] [2023-11-06 22:19:17,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:17,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:19:17,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:19:17,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:19:17,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:19:20,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 358 out of 864 [2023-11-06 22:19:20,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 90 flow. Second operand has 10 states, 10 states have (on average 359.4) internal successors, (3594), 10 states have internal predecessors, (3594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:20,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:20,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 358 of 864 [2023-11-06 22:19:20,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:21,988 INFO L124 PetriNetUnfolderBase]: 1461/2166 cut-off events. [2023-11-06 22:19:21,988 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-06 22:19:21,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4693 conditions, 2166 events. 1461/2166 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9694 event pairs, 387 based on Foata normal form. 0/1444 useless extension candidates. Maximal degree in co-relation 4682. Up to 788 conditions per place. [2023-11-06 22:19:21,999 INFO L140 encePairwiseOnDemand]: 859/864 looper letters, 102 selfloop transitions, 6 changer transitions 0/108 dead transitions. [2023-11-06 22:19:21,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 108 transitions, 473 flow [2023-11-06 22:19:22,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:19:22,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:19:22,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2614 transitions. [2023-11-06 22:19:22,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4322089947089947 [2023-11-06 22:19:22,010 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2614 transitions. [2023-11-06 22:19:22,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2614 transitions. [2023-11-06 22:19:22,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:22,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2614 transitions. [2023-11-06 22:19:22,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 373.42857142857144) internal successors, (2614), 7 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:22,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 864.0) internal successors, (6912), 8 states have internal predecessors, (6912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:22,030 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 864.0) internal successors, (6912), 8 states have internal predecessors, (6912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:22,030 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 90 flow. Second operand 7 states and 2614 transitions. [2023-11-06 22:19:22,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 108 transitions, 473 flow [2023-11-06 22:19:22,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 108 transitions, 470 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:19:22,033 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 117 flow [2023-11-06 22:19:22,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=117, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2023-11-06 22:19:22,034 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2023-11-06 22:19:22,035 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 117 flow [2023-11-06 22:19:22,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 359.4) internal successors, (3594), 10 states have internal predecessors, (3594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:22,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:22,036 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:22,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:22,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:22,248 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:19:22,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:22,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1577918292, now seen corresponding path program 1 times [2023-11-06 22:19:22,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:19:22,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220670025] [2023-11-06 22:19:22,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:22,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:22,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:19:22,251 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:19:22,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-06 22:19:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:22,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:19:22,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:22,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:22,469 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:19:22,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:22,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:22,489 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:22,493 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:19:22,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:22,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:22,506 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:22,509 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:19:22,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:22,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:22,529 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:22,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:22,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:22,544 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:22,550 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:19:22,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:22,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:22,567 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:22,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:22,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:22,582 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:19:22,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:22,591 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:19:22,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:22,599 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:19:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:22,647 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:19:22,647 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:19:22,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220670025] [2023-11-06 22:19:22,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220670025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:19:22,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:19:22,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:19:22,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540657611] [2023-11-06 22:19:22,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:19:22,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:19:22,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:19:22,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:19:22,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:19:22,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 864 [2023-11-06 22:19:22,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 368.3333333333333) internal successors, (1105), 3 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:22,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:22,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 864 [2023-11-06 22:19:22,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:23,250 INFO L124 PetriNetUnfolderBase]: 1365/2014 cut-off events. [2023-11-06 22:19:23,250 INFO L125 PetriNetUnfolderBase]: For 1189/1189 co-relation queries the response was YES. [2023-11-06 22:19:23,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4782 conditions, 2014 events. 1365/2014 cut-off events. For 1189/1189 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8059 event pairs, 1053 based on Foata normal form. 0/1426 useless extension candidates. Maximal degree in co-relation 4769. Up to 2014 conditions per place. [2023-11-06 22:19:23,263 INFO L140 encePairwiseOnDemand]: 861/864 looper letters, 33 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-11-06 22:19:23,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 34 transitions, 181 flow [2023-11-06 22:19:23,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:19:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:19:23,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1129 transitions. [2023-11-06 22:19:23,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435570987654321 [2023-11-06 22:19:23,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1129 transitions. [2023-11-06 22:19:23,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1129 transitions. [2023-11-06 22:19:23,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:23,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1129 transitions. [2023-11-06 22:19:23,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 376.3333333333333) internal successors, (1129), 3 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:23,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 864.0) internal successors, (3456), 4 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:23,278 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 864.0) internal successors, (3456), 4 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:23,278 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 117 flow. Second operand 3 states and 1129 transitions. [2023-11-06 22:19:23,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 34 transitions, 181 flow [2023-11-06 22:19:23,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 34 transitions, 172 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-06 22:19:23,280 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 106 flow [2023-11-06 22:19:23,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2023-11-06 22:19:23,281 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2023-11-06 22:19:23,282 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 106 flow [2023-11-06 22:19:23,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 368.3333333333333) internal successors, (1105), 3 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:23,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:23,282 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:23,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:23,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:23,495 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:19:23,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:23,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1577918293, now seen corresponding path program 1 times [2023-11-06 22:19:23,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:19:23,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856105830] [2023-11-06 22:19:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:23,497 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:23,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:19:23,498 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:19:23,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-06 22:19:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:23,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:19:23,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:23,723 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:19:23,724 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 22:19:23,753 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:19:23,753 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 22:19:23,770 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:19:23,771 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 22:19:23,788 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:19:23,789 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 22:19:23,805 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:19:23,805 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 22:19:23,829 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:19:23,829 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 22:19:23,847 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:19:23,847 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 22:19:23,867 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:19:23,867 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 22:19:23,889 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:19:23,889 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 22:19:23,914 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:19:23,914 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 22:19:23,963 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:19:23,963 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-06 22:19:23,995 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:19:23,995 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 22:19:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:24,179 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:19:24,179 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:19:24,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856105830] [2023-11-06 22:19:24,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856105830] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:19:24,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:19:24,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:19:24,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623653778] [2023-11-06 22:19:24,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:19:24,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:19:24,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:19:24,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:19:24,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:19:24,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 362 out of 864 [2023-11-06 22:19:24,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 364.3333333333333) internal successors, (1093), 3 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:24,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:24,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 362 of 864 [2023-11-06 22:19:24,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:24,832 INFO L124 PetriNetUnfolderBase]: 1269/1862 cut-off events. [2023-11-06 22:19:24,832 INFO L125 PetriNetUnfolderBase]: For 784/784 co-relation queries the response was YES. [2023-11-06 22:19:24,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4292 conditions, 1862 events. 1269/1862 cut-off events. For 784/784 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7279 event pairs, 975 based on Foata normal form. 0/1358 useless extension candidates. Maximal degree in co-relation 4279. Up to 1862 conditions per place. [2023-11-06 22:19:24,839 INFO L140 encePairwiseOnDemand]: 861/864 looper letters, 31 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-11-06 22:19:24,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 32 transitions, 166 flow [2023-11-06 22:19:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:19:24,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:19:24,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1115 transitions. [2023-11-06 22:19:24,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43016975308641975 [2023-11-06 22:19:24,845 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1115 transitions. [2023-11-06 22:19:24,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1115 transitions. [2023-11-06 22:19:24,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:24,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1115 transitions. [2023-11-06 22:19:24,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 371.6666666666667) internal successors, (1115), 3 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:24,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 864.0) internal successors, (3456), 4 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:24,854 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 864.0) internal successors, (3456), 4 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:24,854 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 106 flow. Second operand 3 states and 1115 transitions. [2023-11-06 22:19:24,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 32 transitions, 166 flow [2023-11-06 22:19:24,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 32 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:19:24,856 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 103 flow [2023-11-06 22:19:24,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2023-11-06 22:19:24,857 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-11-06 22:19:24,858 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 103 flow [2023-11-06 22:19:24,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 364.3333333333333) internal successors, (1093), 3 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:24,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:24,858 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:24,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:25,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:25,071 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:19:25,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:25,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1670827901, now seen corresponding path program 1 times [2023-11-06 22:19:25,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:19:25,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836741902] [2023-11-06 22:19:25,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:25,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:25,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:19:25,073 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:19:25,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-06 22:19:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:25,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:19:25,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:25,241 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:19:25,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,260 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:25,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,265 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:25,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,273 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:25,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,281 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:25,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,286 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:25,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,295 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:25,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,300 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:25,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,308 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:25,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,313 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:25,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,321 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:25,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,336 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:25,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,347 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:25,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,364 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:25,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,371 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:25,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,380 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:25,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,389 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:25,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,395 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:25,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,408 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:25,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,425 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:25,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,437 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:25,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,452 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:25,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,479 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:19:25,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:25,495 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:25,571 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:19:25,571 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:19:25,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836741902] [2023-11-06 22:19:25,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836741902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:19:25,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:19:25,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:19:25,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910862247] [2023-11-06 22:19:25,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:19:25,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:19:25,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:19:25,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:19:25,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:19:25,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 864 [2023-11-06 22:19:25,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 360.6) internal successors, (1803), 5 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:25,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:25,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 864 [2023-11-06 22:19:25,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:26,704 INFO L124 PetriNetUnfolderBase]: 1909/2806 cut-off events. [2023-11-06 22:19:26,704 INFO L125 PetriNetUnfolderBase]: For 1204/1204 co-relation queries the response was YES. [2023-11-06 22:19:26,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6441 conditions, 2806 events. 1909/2806 cut-off events. For 1204/1204 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12499 event pairs, 975 based on Foata normal form. 0/2042 useless extension candidates. Maximal degree in co-relation 6427. Up to 1858 conditions per place. [2023-11-06 22:19:26,718 INFO L140 encePairwiseOnDemand]: 859/864 looper letters, 50 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-11-06 22:19:26,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 54 transitions, 283 flow [2023-11-06 22:19:26,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:19:26,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:19:26,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1842 transitions. [2023-11-06 22:19:26,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263888888888889 [2023-11-06 22:19:26,725 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1842 transitions. [2023-11-06 22:19:26,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1842 transitions. [2023-11-06 22:19:26,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:26,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1842 transitions. [2023-11-06 22:19:26,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 368.4) internal successors, (1842), 5 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:26,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 864.0) internal successors, (5184), 6 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:26,739 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 864.0) internal successors, (5184), 6 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:26,739 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 103 flow. Second operand 5 states and 1842 transitions. [2023-11-06 22:19:26,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 54 transitions, 283 flow [2023-11-06 22:19:26,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:19:26,742 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 118 flow [2023-11-06 22:19:26,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=118, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2023-11-06 22:19:26,743 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2023-11-06 22:19:26,744 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 118 flow [2023-11-06 22:19:26,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 360.6) internal successors, (1803), 5 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:26,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:26,744 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2023-11-06 22:19:26,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-11-06 22:19:26,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:26,957 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:19:26,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:26,957 INFO L85 PathProgramCache]: Analyzing trace with hash -216575587, now seen corresponding path program 2 times [2023-11-06 22:19:26,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:19:26,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704605554] [2023-11-06 22:19:26,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:19:26,958 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:26,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:19:26,959 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:19:26,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-06 22:19:27,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:19:27,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:27,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:19:27,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:27,184 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:19:27,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,196 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 11 treesize of output 1 [2023-11-06 22:19:27,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,205 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:27,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,220 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:27,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,237 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:27,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,263 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:19:27,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,269 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:27,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,276 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:27,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,292 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:27,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,300 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:27,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,306 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:27,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,314 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:27,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,320 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:27,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,327 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:27,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,336 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:27,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,352 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:27,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,357 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:27,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,364 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:27,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,371 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:27,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:27,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,396 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:27,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,405 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:27,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,411 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:27,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:27,418 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:27,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:27,976 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:19:27,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704605554] [2023-11-06 22:19:27,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704605554] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:27,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:19:27,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2023-11-06 22:19:27,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310825320] [2023-11-06 22:19:27,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:27,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:19:27,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:19:27,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:19:27,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:19:31,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 358 out of 864 [2023-11-06 22:19:31,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 118 flow. Second operand has 12 states, 12 states have (on average 359.5) internal successors, (4314), 12 states have internal predecessors, (4314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:31,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:31,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 358 of 864 [2023-11-06 22:19:31,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:33,531 INFO L124 PetriNetUnfolderBase]: 1701/2536 cut-off events. [2023-11-06 22:19:33,532 INFO L125 PetriNetUnfolderBase]: For 849/849 co-relation queries the response was YES. [2023-11-06 22:19:33,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6197 conditions, 2536 events. 1701/2536 cut-off events. For 849/849 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11953 event pairs, 63 based on Foata normal form. 124/2194 useless extension candidates. Maximal degree in co-relation 6181. Up to 596 conditions per place. [2023-11-06 22:19:33,543 INFO L140 encePairwiseOnDemand]: 859/864 looper letters, 102 selfloop transitions, 6 changer transitions 0/108 dead transitions. [2023-11-06 22:19:33,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 108 transitions, 531 flow [2023-11-06 22:19:33,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:19:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:19:33,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2967 transitions. [2023-11-06 22:19:33,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292534722222222 [2023-11-06 22:19:33,551 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2967 transitions. [2023-11-06 22:19:33,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2967 transitions. [2023-11-06 22:19:33,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:33,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2967 transitions. [2023-11-06 22:19:33,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 370.875) internal successors, (2967), 8 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:33,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 864.0) internal successors, (7776), 9 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:33,565 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 864.0) internal successors, (7776), 9 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:33,565 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 118 flow. Second operand 8 states and 2967 transitions. [2023-11-06 22:19:33,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 108 transitions, 531 flow [2023-11-06 22:19:33,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 108 transitions, 508 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-06 22:19:33,573 INFO L231 Difference]: Finished difference. Result has 48 places, 31 transitions, 101 flow [2023-11-06 22:19:33,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=101, PETRI_PLACES=48, PETRI_TRANSITIONS=31} [2023-11-06 22:19:33,574 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2023-11-06 22:19:33,574 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 31 transitions, 101 flow [2023-11-06 22:19:33,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 359.5) internal successors, (4314), 12 states have internal predecessors, (4314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:33,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:33,576 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:33,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-11-06 22:19:33,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:33,795 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:19:33,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:33,795 INFO L85 PathProgramCache]: Analyzing trace with hash -256055353, now seen corresponding path program 1 times [2023-11-06 22:19:33,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:19:33,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306408723] [2023-11-06 22:19:33,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:33,796 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:33,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:19:33,797 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:19:33,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-06 22:19:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:33,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:19:33,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:33,952 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:19:33,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:33,963 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:33,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:33,969 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:33,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:33,977 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:33,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:33,983 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 22:19:33,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:33,991 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:34,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:34,013 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:34,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:34,023 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 22:19:34,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:34,034 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:34,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:34,050 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:34,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:34,070 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:34,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:34,096 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:19:34,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:34,103 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:34,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:34,112 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 22:19:34,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:34,121 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:34,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:34,136 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:34,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:34,141 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:34,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:34,148 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:34,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:34,154 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 6 treesize of output 1 [2023-11-06 22:19:34,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:34,163 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:34,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:34,173 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:34,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:34,188 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:34,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:34,193 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:34,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:34,201 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:34,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:34,716 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:19:34,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306408723] [2023-11-06 22:19:34,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306408723] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:34,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:19:34,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:19:34,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30300861] [2023-11-06 22:19:34,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:34,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:19:34,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:19:34,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:19:34,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:19:37,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 358 out of 864 [2023-11-06 22:19:37,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 31 transitions, 101 flow. Second operand has 10 states, 10 states have (on average 359.8) internal successors, (3598), 10 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:37,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:37,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 358 of 864 [2023-11-06 22:19:37,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:38,805 INFO L124 PetriNetUnfolderBase]: 2845/4248 cut-off events. [2023-11-06 22:19:38,805 INFO L125 PetriNetUnfolderBase]: For 1378/1378 co-relation queries the response was YES. [2023-11-06 22:19:38,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10055 conditions, 4248 events. 2845/4248 cut-off events. For 1378/1378 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 21243 event pairs, 895 based on Foata normal form. 0/3542 useless extension candidates. Maximal degree in co-relation 10042. Up to 1676 conditions per place. [2023-11-06 22:19:38,824 INFO L140 encePairwiseOnDemand]: 859/864 looper letters, 84 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2023-11-06 22:19:38,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 90 transitions, 457 flow [2023-11-06 22:19:38,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:19:38,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:19:38,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2588 transitions. [2023-11-06 22:19:38,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279100529100529 [2023-11-06 22:19:38,865 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2588 transitions. [2023-11-06 22:19:38,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2588 transitions. [2023-11-06 22:19:38,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:38,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2588 transitions. [2023-11-06 22:19:38,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 369.7142857142857) internal successors, (2588), 7 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:38,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 864.0) internal successors, (6912), 8 states have internal predecessors, (6912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:38,879 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 864.0) internal successors, (6912), 8 states have internal predecessors, (6912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:38,879 INFO L175 Difference]: Start difference. First operand has 48 places, 31 transitions, 101 flow. Second operand 7 states and 2588 transitions. [2023-11-06 22:19:38,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 90 transitions, 457 flow [2023-11-06 22:19:38,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 90 transitions, 425 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 22:19:38,882 INFO L231 Difference]: Finished difference. Result has 50 places, 33 transitions, 120 flow [2023-11-06 22:19:38,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=120, PETRI_PLACES=50, PETRI_TRANSITIONS=33} [2023-11-06 22:19:38,883 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2023-11-06 22:19:38,884 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 33 transitions, 120 flow [2023-11-06 22:19:38,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 359.8) internal successors, (3598), 10 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:38,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:38,885 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:38,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:39,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:39,097 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:19:39,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:39,098 INFO L85 PathProgramCache]: Analyzing trace with hash 654286521, now seen corresponding path program 1 times [2023-11-06 22:19:39,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:19:39,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259945410] [2023-11-06 22:19:39,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:39,098 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:39,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:19:39,099 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:19:39,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-06 22:19:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:39,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:19:39,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:39,259 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:19:39,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,270 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:39,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,276 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:39,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,284 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:39,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,293 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 22:19:39,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,309 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:39,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,318 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:39,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,323 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:39,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,332 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:39,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:39,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,346 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:39,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,361 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:39,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,382 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:39,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,407 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:19:39,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,425 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:39,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,433 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:39,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,451 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:39,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,469 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:39,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,480 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:39,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,486 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:39,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,497 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:39,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,514 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:39,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,521 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:39,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:39,530 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:39,632 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:19:39,632 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:19:39,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259945410] [2023-11-06 22:19:39,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259945410] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:19:39,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:19:39,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:19:39,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554278278] [2023-11-06 22:19:39,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:19:39,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:19:39,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:19:39,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:19:39,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:19:39,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 864 [2023-11-06 22:19:39,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 33 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 361.0) internal successors, (1805), 5 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:39,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:39,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 864 [2023-11-06 22:19:39,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:41,133 INFO L124 PetriNetUnfolderBase]: 4089/6108 cut-off events. [2023-11-06 22:19:41,134 INFO L125 PetriNetUnfolderBase]: For 4466/4466 co-relation queries the response was YES. [2023-11-06 22:19:41,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15509 conditions, 6108 events. 4089/6108 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 31807 event pairs, 2431 based on Foata normal form. 0/5232 useless extension candidates. Maximal degree in co-relation 15494. Up to 4244 conditions per place. [2023-11-06 22:19:41,157 INFO L140 encePairwiseOnDemand]: 859/864 looper letters, 50 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-11-06 22:19:41,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 54 transitions, 310 flow [2023-11-06 22:19:41,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:19:41,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:19:41,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1838 transitions. [2023-11-06 22:19:41,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425462962962963 [2023-11-06 22:19:41,163 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1838 transitions. [2023-11-06 22:19:41,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1838 transitions. [2023-11-06 22:19:41,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:41,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1838 transitions. [2023-11-06 22:19:41,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 367.6) internal successors, (1838), 5 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:41,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 864.0) internal successors, (5184), 6 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:41,171 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 864.0) internal successors, (5184), 6 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:41,171 INFO L175 Difference]: Start difference. First operand has 50 places, 33 transitions, 120 flow. Second operand 5 states and 1838 transitions. [2023-11-06 22:19:41,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 54 transitions, 310 flow [2023-11-06 22:19:41,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 295 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-06 22:19:41,175 INFO L231 Difference]: Finished difference. Result has 52 places, 34 transitions, 127 flow [2023-11-06 22:19:41,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=52, PETRI_TRANSITIONS=34} [2023-11-06 22:19:41,175 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-11-06 22:19:41,175 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 34 transitions, 127 flow [2023-11-06 22:19:41,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 361.0) internal successors, (1805), 5 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:41,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:41,176 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:41,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:41,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:41,376 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:19:41,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:41,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1191952731, now seen corresponding path program 1 times [2023-11-06 22:19:41,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:19:41,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795332299] [2023-11-06 22:19:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:41,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:41,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:19:41,378 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:19:41,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-06 22:19:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:41,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:19:41,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:41,572 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:19:41,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,584 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 11 treesize of output 1 [2023-11-06 22:19:41,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,593 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:41,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,599 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:41,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,622 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:41,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,631 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:41,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,663 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:19:41,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,681 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:41,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,699 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:41,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,708 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:41,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,719 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:41,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,735 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:41,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,746 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:41,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,753 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:41,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,759 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:41,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,767 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 11 treesize of output 1 [2023-11-06 22:19:41,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,786 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:41,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,794 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:41,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,803 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:41,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,809 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:41,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,825 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:19:41,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,837 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:41,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,843 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:19:41,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:41,849 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:19:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:41,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:42,308 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:19:42,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795332299] [2023-11-06 22:19:42,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795332299] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:42,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:19:42,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:19:42,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70340049] [2023-11-06 22:19:42,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:42,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:19:42,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:19:42,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:19:42,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:19:45,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 358 out of 864 [2023-11-06 22:19:45,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 34 transitions, 127 flow. Second operand has 10 states, 10 states have (on average 360.2) internal successors, (3602), 10 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:45,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:45,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 358 of 864 [2023-11-06 22:19:45,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:47,539 INFO L124 PetriNetUnfolderBase]: 6577/9828 cut-off events. [2023-11-06 22:19:47,539 INFO L125 PetriNetUnfolderBase]: For 6873/6873 co-relation queries the response was YES. [2023-11-06 22:19:47,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26041 conditions, 9828 events. 6577/9828 cut-off events. For 6873/6873 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 55815 event pairs, 2431 based on Foata normal form. 0/9536 useless extension candidates. Maximal degree in co-relation 26025. Up to 4244 conditions per place. [2023-11-06 22:19:47,581 INFO L140 encePairwiseOnDemand]: 859/864 looper letters, 90 selfloop transitions, 6 changer transitions 0/96 dead transitions. [2023-11-06 22:19:47,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 96 transitions, 549 flow [2023-11-06 22:19:47,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:19:47,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:19:47,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2582 transitions. [2023-11-06 22:19:47,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269179894179894 [2023-11-06 22:19:47,588 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2582 transitions. [2023-11-06 22:19:47,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2582 transitions. [2023-11-06 22:19:47,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:47,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2582 transitions. [2023-11-06 22:19:47,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 368.85714285714283) internal successors, (2582), 7 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:47,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 864.0) internal successors, (6912), 8 states have internal predecessors, (6912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:47,601 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 864.0) internal successors, (6912), 8 states have internal predecessors, (6912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:47,601 INFO L175 Difference]: Start difference. First operand has 52 places, 34 transitions, 127 flow. Second operand 7 states and 2582 transitions. [2023-11-06 22:19:47,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 96 transitions, 549 flow [2023-11-06 22:19:47,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 96 transitions, 543 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:19:47,609 INFO L231 Difference]: Finished difference. Result has 57 places, 36 transitions, 151 flow [2023-11-06 22:19:47,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=151, PETRI_PLACES=57, PETRI_TRANSITIONS=36} [2023-11-06 22:19:47,610 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-11-06 22:19:47,610 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 36 transitions, 151 flow [2023-11-06 22:19:47,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 360.2) internal successors, (3602), 10 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:47,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:47,611 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:47,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:47,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:47,829 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:19:47,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:47,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1255993529, now seen corresponding path program 2 times [2023-11-06 22:19:47,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:19:47,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383211393] [2023-11-06 22:19:47,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:19:47,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:47,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:19:47,830 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:19:47,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-06 22:19:48,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:19:48,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:48,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:19:48,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:48,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:48,122 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:19:48,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383211393] [2023-11-06 22:19:48,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383211393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:48,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:19:48,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-06 22:19:48,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702134558] [2023-11-06 22:19:48,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:48,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:19:48,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:19:48,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:19:48,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:19:48,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 864 [2023-11-06 22:19:48,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 36 transitions, 151 flow. Second operand has 10 states, 10 states have (on average 370.6) internal successors, (3706), 10 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:48,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:48,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 864 [2023-11-06 22:19:48,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:50,709 INFO L124 PetriNetUnfolderBase]: 5675/8648 cut-off events. [2023-11-06 22:19:50,709 INFO L125 PetriNetUnfolderBase]: For 8748/8748 co-relation queries the response was YES. [2023-11-06 22:19:50,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24142 conditions, 8648 events. 5675/8648 cut-off events. For 8748/8748 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 51380 event pairs, 337 based on Foata normal form. 556/9204 useless extension candidates. Maximal degree in co-relation 24124. Up to 1996 conditions per place. [2023-11-06 22:19:50,746 INFO L140 encePairwiseOnDemand]: 861/864 looper letters, 113 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2023-11-06 22:19:50,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 117 transitions, 699 flow [2023-11-06 22:19:50,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:19:50,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:19:50,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2306 transitions. [2023-11-06 22:19:50,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44483024691358025 [2023-11-06 22:19:50,753 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2306 transitions. [2023-11-06 22:19:50,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2306 transitions. [2023-11-06 22:19:50,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:50,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2306 transitions. [2023-11-06 22:19:50,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 384.3333333333333) internal successors, (2306), 6 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:50,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 864.0) internal successors, (6048), 7 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:50,762 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 864.0) internal successors, (6048), 7 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:50,762 INFO L175 Difference]: Start difference. First operand has 57 places, 36 transitions, 151 flow. Second operand 6 states and 2306 transitions. [2023-11-06 22:19:50,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 117 transitions, 699 flow [2023-11-06 22:19:50,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 117 transitions, 657 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-11-06 22:19:50,798 INFO L231 Difference]: Finished difference. Result has 54 places, 34 transitions, 127 flow [2023-11-06 22:19:50,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=127, PETRI_PLACES=54, PETRI_TRANSITIONS=34} [2023-11-06 22:19:50,798 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-11-06 22:19:50,798 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 34 transitions, 127 flow [2023-11-06 22:19:50,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 370.6) internal successors, (3706), 10 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:50,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:50,799 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:50,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:50,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:50,999 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:19:51,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:51,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1289744677, now seen corresponding path program 2 times [2023-11-06 22:19:51,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:19:51,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847154883] [2023-11-06 22:19:51,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:19:51,000 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:51,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:19:51,001 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:19:51,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-06 22:19:51,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:19:51,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:51,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:19:51,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:51,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:51,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:51,319 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:19:51,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847154883] [2023-11-06 22:19:51,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847154883] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:51,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:19:51,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-06 22:19:51,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810433290] [2023-11-06 22:19:51,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:51,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:19:51,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:19:51,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:19:51,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:19:51,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 864 [2023-11-06 22:19:51,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 34 transitions, 127 flow. Second operand has 10 states, 10 states have (on average 370.8) internal successors, (3708), 10 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:51,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:51,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 864 [2023-11-06 22:19:51,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:53,520 INFO L124 PetriNetUnfolderBase]: 4872/7579 cut-off events. [2023-11-06 22:19:53,520 INFO L125 PetriNetUnfolderBase]: For 4284/4284 co-relation queries the response was YES. [2023-11-06 22:19:53,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19617 conditions, 7579 events. 4872/7579 cut-off events. For 4284/4284 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 44183 event pairs, 576 based on Foata normal form. 532/8111 useless extension candidates. Maximal degree in co-relation 19603. Up to 1638 conditions per place. [2023-11-06 22:19:53,556 INFO L140 encePairwiseOnDemand]: 861/864 looper letters, 97 selfloop transitions, 4 changer transitions 0/101 dead transitions. [2023-11-06 22:19:53,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 101 transitions, 548 flow [2023-11-06 22:19:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:19:53,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:19:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2295 transitions. [2023-11-06 22:19:53,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4427083333333333 [2023-11-06 22:19:53,562 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2295 transitions. [2023-11-06 22:19:53,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2295 transitions. [2023-11-06 22:19:53,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:53,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2295 transitions. [2023-11-06 22:19:53,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 382.5) internal successors, (2295), 6 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:53,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 864.0) internal successors, (6048), 7 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:53,573 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 864.0) internal successors, (6048), 7 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:53,574 INFO L175 Difference]: Start difference. First operand has 54 places, 34 transitions, 127 flow. Second operand 6 states and 2295 transitions. [2023-11-06 22:19:53,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 101 transitions, 548 flow [2023-11-06 22:19:53,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 101 transitions, 504 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-06 22:19:53,621 INFO L231 Difference]: Finished difference. Result has 50 places, 32 transitions, 105 flow [2023-11-06 22:19:53,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=105, PETRI_PLACES=50, PETRI_TRANSITIONS=32} [2023-11-06 22:19:53,622 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2023-11-06 22:19:53,622 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 32 transitions, 105 flow [2023-11-06 22:19:53,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 370.8) internal successors, (3708), 10 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:53,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:53,623 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:53,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:53,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:53,836 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:19:53,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:53,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1567486482, now seen corresponding path program 1 times [2023-11-06 22:19:53,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:19:53,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837211666] [2023-11-06 22:19:53,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:53,837 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:53,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:19:53,838 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:19:53,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-06 22:19:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:54,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:19:54,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:54,172 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:19:54,172 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:19:54,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837211666] [2023-11-06 22:19:54,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837211666] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:19:54,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:19:54,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:19:54,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404236565] [2023-11-06 22:19:54,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:19:54,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:19:54,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:19:54,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:19:54,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:19:54,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 356 out of 864 [2023-11-06 22:19:54,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 32 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 361.25) internal successors, (1445), 4 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:54,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:54,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 356 of 864 [2023-11-06 22:19:54,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:55,787 INFO L124 PetriNetUnfolderBase]: 4872/7563 cut-off events. [2023-11-06 22:19:55,788 INFO L125 PetriNetUnfolderBase]: For 3035/3035 co-relation queries the response was YES. [2023-11-06 22:19:55,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18825 conditions, 7563 events. 4872/7563 cut-off events. For 3035/3035 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 43645 event pairs, 3710 based on Foata normal form. 16/7579 useless extension candidates. Maximal degree in co-relation 18814. Up to 5788 conditions per place. [2023-11-06 22:19:55,814 INFO L140 encePairwiseOnDemand]: 860/864 looper letters, 45 selfloop transitions, 2 changer transitions 21/68 dead transitions. [2023-11-06 22:19:55,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 68 transitions, 362 flow [2023-11-06 22:19:55,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:19:55,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:19:55,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1478 transitions. [2023-11-06 22:19:55,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42766203703703703 [2023-11-06 22:19:55,820 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1478 transitions. [2023-11-06 22:19:55,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1478 transitions. [2023-11-06 22:19:55,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:55,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1478 transitions. [2023-11-06 22:19:55,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 369.5) internal successors, (1478), 4 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:55,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 864.0) internal successors, (4320), 5 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:55,825 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 864.0) internal successors, (4320), 5 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:55,825 INFO L175 Difference]: Start difference. First operand has 50 places, 32 transitions, 105 flow. Second operand 4 states and 1478 transitions. [2023-11-06 22:19:55,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 68 transitions, 362 flow [2023-11-06 22:19:55,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 68 transitions, 341 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:19:55,829 INFO L231 Difference]: Finished difference. Result has 51 places, 32 transitions, 108 flow [2023-11-06 22:19:55,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=51, PETRI_TRANSITIONS=32} [2023-11-06 22:19:55,830 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-11-06 22:19:55,830 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 32 transitions, 108 flow [2023-11-06 22:19:55,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 361.25) internal successors, (1445), 4 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:55,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:55,830 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:55,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:56,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:56,034 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:19:56,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:56,034 INFO L85 PathProgramCache]: Analyzing trace with hash -554493849, now seen corresponding path program 1 times [2023-11-06 22:19:56,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:19:56,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63636896] [2023-11-06 22:19:56,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:56,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:56,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:19:56,036 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:19:56,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-11-06 22:19:56,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:56,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:19:56,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 22:19:56,414 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:19:56,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:19:56,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63636896] [2023-11-06 22:19:56,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63636896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:19:56,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:19:56,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:19:56,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308560353] [2023-11-06 22:19:56,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:19:56,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:19:56,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:19:56,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:19:56,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:19:56,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 356 out of 864 [2023-11-06 22:19:56,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 32 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 361.5) internal successors, (1446), 4 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:56,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:56,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 356 of 864 [2023-11-06 22:19:56,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:57,829 INFO L124 PetriNetUnfolderBase]: 4115/6362 cut-off events. [2023-11-06 22:19:57,830 INFO L125 PetriNetUnfolderBase]: For 3028/3028 co-relation queries the response was YES. [2023-11-06 22:19:57,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16417 conditions, 6362 events. 4115/6362 cut-off events. For 3028/3028 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 35173 event pairs, 3151 based on Foata normal form. 12/6374 useless extension candidates. Maximal degree in co-relation 16404. Up to 4905 conditions per place. [2023-11-06 22:19:57,858 INFO L140 encePairwiseOnDemand]: 860/864 looper letters, 45 selfloop transitions, 2 changer transitions 19/66 dead transitions. [2023-11-06 22:19:57,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 66 transitions, 358 flow [2023-11-06 22:19:57,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:19:57,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:19:57,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1476 transitions. [2023-11-06 22:19:57,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2023-11-06 22:19:57,861 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1476 transitions. [2023-11-06 22:19:57,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1476 transitions. [2023-11-06 22:19:57,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:57,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1476 transitions. [2023-11-06 22:19:57,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 22:19:57,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 864.0) internal successors, (4320), 5 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:57,868 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 864.0) internal successors, (4320), 5 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:57,869 INFO L175 Difference]: Start difference. First operand has 51 places, 32 transitions, 108 flow. Second operand 4 states and 1476 transitions. [2023-11-06 22:19:57,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 66 transitions, 358 flow [2023-11-06 22:19:57,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 338 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-06 22:19:57,872 INFO L231 Difference]: Finished difference. Result has 52 places, 32 transitions, 110 flow [2023-11-06 22:19:57,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=52, PETRI_TRANSITIONS=32} [2023-11-06 22:19:57,873 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-11-06 22:19:57,873 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 32 transitions, 110 flow [2023-11-06 22:19:57,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 361.5) internal successors, (1446), 4 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:57,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:57,874 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:57,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:58,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:58,088 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:19:58,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:58,088 INFO L85 PathProgramCache]: Analyzing trace with hash 309017255, now seen corresponding path program 1 times [2023-11-06 22:19:58,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:19:58,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643614594] [2023-11-06 22:19:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:58,089 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:19:58,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:19:58,091 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:19:58,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-11-06 22:19:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:58,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:19:58,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:58,438 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2023-11-06 22:19:59,167 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 83 treesize of output 64 [2023-11-06 22:19:59,368 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:19:59,369 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 323 treesize of output 125 [2023-11-06 22:20:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:20:00,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:02,224 INFO L322 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-11-06 22:20:02,224 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 461 treesize of output 199 [2023-11-06 22:20:02,252 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:20:02,253 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 30 [2023-11-06 22:20:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:20:08,071 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:20:08,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643614594] [2023-11-06 22:20:08,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643614594] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:08,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:20:08,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-06 22:20:08,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884311207] [2023-11-06 22:20:08,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:08,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:20:08,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:20:08,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:20:08,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=255, Unknown=2, NotChecked=0, Total=306 [2023-11-06 22:20:17,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 864 [2023-11-06 22:20:17,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 32 transitions, 110 flow. Second operand has 18 states, 18 states have (on average 280.3333333333333) internal successors, (5046), 18 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:17,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:17,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 864 [2023-11-06 22:20:17,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:25,482 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 22:20:29,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:20:33,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:21:37,812 INFO L124 PetriNetUnfolderBase]: 9353/14474 cut-off events. [2023-11-06 22:21:37,812 INFO L125 PetriNetUnfolderBase]: For 7773/7773 co-relation queries the response was YES. [2023-11-06 22:21:37,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40056 conditions, 14474 events. 9353/14474 cut-off events. For 7773/7773 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 95480 event pairs, 1330 based on Foata normal form. 20/14494 useless extension candidates. Maximal degree in co-relation 40042. Up to 3170 conditions per place. [2023-11-06 22:21:37,876 INFO L140 encePairwiseOnDemand]: 853/864 looper letters, 303 selfloop transitions, 65 changer transitions 56/424 dead transitions. [2023-11-06 22:21:37,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 424 transitions, 2260 flow [2023-11-06 22:21:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:21:37,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-06 22:21:37,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 9794 transitions. [2023-11-06 22:21:37,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33340141612200436 [2023-11-06 22:21:37,892 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 9794 transitions. [2023-11-06 22:21:37,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 9794 transitions. [2023-11-06 22:21:37,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:37,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 9794 transitions. [2023-11-06 22:21:37,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 288.05882352941177) internal successors, (9794), 34 states have internal predecessors, (9794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:37,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 864.0) internal successors, (30240), 35 states have internal predecessors, (30240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:37,930 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 864.0) internal successors, (30240), 35 states have internal predecessors, (30240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:37,930 INFO L175 Difference]: Start difference. First operand has 52 places, 32 transitions, 110 flow. Second operand 34 states and 9794 transitions. [2023-11-06 22:21:37,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 424 transitions, 2260 flow [2023-11-06 22:21:37,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 424 transitions, 2166 flow, removed 21 selfloop flow, removed 3 redundant places. [2023-11-06 22:21:37,941 INFO L231 Difference]: Finished difference. Result has 93 places, 98 transitions, 555 flow [2023-11-06 22:21:37,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=864, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=555, PETRI_PLACES=93, PETRI_TRANSITIONS=98} [2023-11-06 22:21:37,942 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 42 predicate places. [2023-11-06 22:21:37,942 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 98 transitions, 555 flow [2023-11-06 22:21:37,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 280.3333333333333) internal successors, (5046), 18 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:37,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:37,943 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:37,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:38,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:21:38,143 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:21:38,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:38,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1097152111, now seen corresponding path program 2 times [2023-11-06 22:21:38,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:21:38,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1798391483] [2023-11-06 22:21:38,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:21:38,145 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:21:38,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:21:38,146 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:21:38,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f20c3ed-1efa-4888-928e-52394aa5091b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-11-06 22:21:38,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:21:38,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:21:38,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:21:38,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:40,441 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:21:40,441 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 411 treesize of output 169 [2023-11-06 22:21:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:21:40,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:43,467 INFO L322 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-11-06 22:21:43,467 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 523 treesize of output 191 [2023-11-06 22:21:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:21:45,919 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:21:45,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1798391483] [2023-11-06 22:21:45,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1798391483] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:45,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:21:45,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-11-06 22:21:45,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99148221] [2023-11-06 22:21:45,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:45,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:21:45,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:21:45,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:21:45,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306