./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.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_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/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_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/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_0c7ae56c-065c-425e-9121-2a2c52bba10f/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 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:04:01,086 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:04:01,247 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 23:04:01,257 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:04:01,258 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:04:01,302 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:04:01,306 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:04:01,307 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:04:01,308 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:04:01,314 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:04:01,315 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:04:01,315 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:04:01,316 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:04:01,318 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:04:01,319 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:04:01,319 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:04:01,320 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:04:01,320 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:04:01,321 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 23:04:01,321 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 23:04:01,321 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 23:04:01,322 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:04:01,323 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 23:04:01,323 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 23:04:01,324 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:04:01,324 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:04:01,325 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:04:01,326 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:04:01,326 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:04:01,327 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:04:01,328 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:04:01,329 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:04:01,329 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:04:01,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:04:01,329 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:04:01,330 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:04:01,330 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:04:01,330 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:04:01,331 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_0c7ae56c-065c-425e-9121-2a2c52bba10f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c [2023-11-06 23:04:01,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:04:01,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:04:01,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:04:01,718 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:04:01,719 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:04:01,721 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2023-11-06 23:04:05,049 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:04:05,281 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:04:05,282 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2023-11-06 23:04:05,292 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/data/32641674d/d290d04c04224490926c325b9e688555/FLAG6cedc8a80 [2023-11-06 23:04:05,309 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/data/32641674d/d290d04c04224490926c325b9e688555 [2023-11-06 23:04:05,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:04:05,314 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:04:05,315 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:04:05,316 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:04:05,327 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:04:05,328 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:04:05" (1/1) ... [2023-11-06 23:04:05,333 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@238f3577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:05, skipping insertion in model container [2023-11-06 23:04:05,333 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:04:05" (1/1) ... [2023-11-06 23:04:05,371 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:04:05,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:04:05,683 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 23:04:05,684 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@15c27bd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:05, skipping insertion in model container [2023-11-06 23:04:05,684 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:04:05,685 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 23:04:05,687 INFO L158 Benchmark]: Toolchain (without parser) took 372.02ms. Allocated memory is still 151.0MB. Free memory was 121.8MB in the beginning and 120.2MB in the end (delta: 1.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 23:04:05,688 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 151.0MB. Free memory was 121.3MB in the beginning and 121.1MB in the end (delta: 176.2kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 23:04:05,689 INFO L158 Benchmark]: CACSL2BoogieTranslator took 369.08ms. Allocated memory is still 151.0MB. Free memory was 121.6MB in the beginning and 120.2MB in the end (delta: 1.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 23:04:05,690 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 151.0MB. Free memory was 121.3MB in the beginning and 121.1MB in the end (delta: 176.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 369.08ms. Allocated memory is still 151.0MB. Free memory was 121.6MB in the beginning and 120.2MB in the end (delta: 1.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: 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_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/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_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/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_0c7ae56c-065c-425e-9121-2a2c52bba10f/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 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:04:08,410 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:04:08,576 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 23:04:08,586 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:04:08,587 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:04:08,636 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:04:08,637 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:04:08,638 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:04:08,639 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:04:08,647 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:04:08,648 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:04:08,649 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:04:08,649 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:04:08,651 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:04:08,652 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:04:08,652 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:04:08,653 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:04:08,653 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:04:08,654 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 23:04:08,654 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 23:04:08,654 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 23:04:08,655 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:04:08,655 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 23:04:08,656 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 23:04:08,656 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 23:04:08,657 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 23:04:08,657 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:04:08,657 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:04:08,658 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:04:08,659 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:04:08,660 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:04:08,661 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:04:08,661 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:04:08,661 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:04:08,662 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 23:04:08,662 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 23:04:08,662 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:04:08,662 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:04:08,663 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:04:08,664 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 23:04:08,664 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:04:08,664 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_0c7ae56c-065c-425e-9121-2a2c52bba10f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c [2023-11-06 23:04:09,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:04:09,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:04:09,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:04:09,165 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:04:09,165 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:04:09,167 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2023-11-06 23:04:12,495 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:04:12,822 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:04:12,822 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2023-11-06 23:04:12,836 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/data/157bf26d7/bd4b6008937a4f71b29303bde24c75f6/FLAG5bee75006 [2023-11-06 23:04:12,852 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/data/157bf26d7/bd4b6008937a4f71b29303bde24c75f6 [2023-11-06 23:04:12,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:04:12,856 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:04:12,857 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:04:12,858 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:04:12,864 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:04:12,864 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:04:12" (1/1) ... [2023-11-06 23:04:12,866 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1900c67f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:12, skipping insertion in model container [2023-11-06 23:04:12,866 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:04:12" (1/1) ... [2023-11-06 23:04:12,910 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:04:13,258 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:04:13,285 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 23:04:13,290 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:04:13,308 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:04:13,314 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:04:13,354 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:04:13,367 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:04:13,367 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:04:13,389 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:04:13,390 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13 WrapperNode [2023-11-06 23:04:13,390 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:04:13,391 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:04:13,391 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:04:13,392 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:04:13,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,428 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,472 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 104 [2023-11-06 23:04:13,472 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:04:13,474 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:04:13,474 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:04:13,474 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:04:13,486 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,486 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,512 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,512 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,534 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,539 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,542 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,544 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,562 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:04:13,563 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:04:13,564 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:04:13,564 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:04:13,565 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (1/1) ... [2023-11-06 23:04:13,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:04:13,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:13,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:04:13,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:04:13,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:04:13,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 23:04:13,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:04:13,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 23:04:13,701 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 23:04:13,702 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 23:04:13,702 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 23:04:13,702 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 23:04:13,702 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 23:04:13,704 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 23:04:13,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 23:04:13,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 23:04:13,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:04:13,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:04:13,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:04:13,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:04:13,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 23:04:13,709 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 23:04:13,902 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:04:13,905 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:04:14,581 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:04:14,736 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:04:14,736 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 23:04:14,739 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:04:14 BoogieIcfgContainer [2023-11-06 23:04:14,740 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:04:14,743 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:04:14,744 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:04:14,748 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:04:14,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:04:12" (1/3) ... [2023-11-06 23:04:14,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13a0b6e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:04:14, skipping insertion in model container [2023-11-06 23:04:14,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:13" (2/3) ... [2023-11-06 23:04:14,753 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13a0b6e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:04:14, skipping insertion in model container [2023-11-06 23:04:14,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:04:14" (3/3) ... [2023-11-06 23:04:14,755 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2023-11-06 23:04:14,777 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:04:14,778 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-11-06 23:04:14,778 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:04:14,932 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 23:04:14,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 187 transitions, 395 flow [2023-11-06 23:04:15,157 INFO L124 PetriNetUnfolderBase]: 12/184 cut-off events. [2023-11-06 23:04:15,160 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:04:15,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 184 events. 12/184 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 228 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 129. Up to 2 conditions per place. [2023-11-06 23:04:15,170 INFO L82 GeneralOperation]: Start removeDead. Operand has 185 places, 187 transitions, 395 flow [2023-11-06 23:04:15,184 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 179 transitions, 376 flow [2023-11-06 23:04:15,188 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:04:15,201 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 179 transitions, 376 flow [2023-11-06 23:04:15,205 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 179 transitions, 376 flow [2023-11-06 23:04:15,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 179 transitions, 376 flow [2023-11-06 23:04:15,270 INFO L124 PetriNetUnfolderBase]: 12/179 cut-off events. [2023-11-06 23:04:15,270 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:04:15,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 179 events. 12/179 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 224 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 129. Up to 2 conditions per place. [2023-11-06 23:04:15,278 INFO L119 LiptonReduction]: Number of co-enabled transitions 2970 [2023-11-06 23:04:45,324 INFO L134 LiptonReduction]: Checked pairs total: 3620 [2023-11-06 23:04:45,325 INFO L136 LiptonReduction]: Total number of compositions: 183 [2023-11-06 23:04:45,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:04:45,349 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;@3a1f9da9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:04:45,349 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2023-11-06 23:04:45,353 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:04:45,353 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 23:04:45,353 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:04:45,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:45,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:04:45,355 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:04:45,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:45,361 INFO L85 PathProgramCache]: Analyzing trace with hash 24009, now seen corresponding path program 1 times [2023-11-06 23:04:45,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:04:45,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620452001] [2023-11-06 23:04:45,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:45,377 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 23:04:45,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:04:45,381 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:04:45,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-06 23:04:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:45,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:04:45,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:45,662 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-06 23:04:45,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:45,692 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:04:45,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:45,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:04:45,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:45,774 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:04:45,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:45,834 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 23:04:45,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:45,867 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:04:45,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:45,895 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:04:45,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:45,909 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:04:45,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:45,954 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:04:45,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:45,975 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:04:45,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:45,990 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:04:46,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:46,005 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:04:46,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:46,026 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:04:46,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:46,040 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 13 treesize of output 1 [2023-11-06 23:04:46,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:46,061 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:04:46,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:46,088 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:04:46,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:46,100 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:04:46,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:46,123 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:04:46,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:46,146 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:04:46,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:46,159 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:04:46,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:46,193 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:04:46,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:46,206 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:04:46,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:46,228 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:04:46,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:46,241 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:04:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:46,267 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:46,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:04:46,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620452001] [2023-11-06 23:04:46,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620452001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:46,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:46,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:04:46,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189233811] [2023-11-06 23:04:46,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:46,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:04:46,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:04:46,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:04:46,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:46,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 370 [2023-11-06 23:04:46,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:46,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:46,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 370 [2023-11-06 23:04:46,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:47,424 INFO L124 PetriNetUnfolderBase]: 2720/3470 cut-off events. [2023-11-06 23:04:47,424 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-06 23:04:47,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7008 conditions, 3470 events. 2720/3470 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 14099 event pairs, 1294 based on Foata normal form. 0/898 useless extension candidates. Maximal degree in co-relation 5996. Up to 3439 conditions per place. [2023-11-06 23:04:47,464 INFO L140 encePairwiseOnDemand]: 357/370 looper letters, 41 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2023-11-06 23:04:47,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 208 flow [2023-11-06 23:04:47,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:04:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:04:47,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-11-06 23:04:47,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4648648648648649 [2023-11-06 23:04:47,483 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-11-06 23:04:47,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-11-06 23:04:47,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:47,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-11-06 23:04:47,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:47,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:47,503 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:47,505 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 120 flow. Second operand 3 states and 516 transitions. [2023-11-06 23:04:47,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 208 flow [2023-11-06 23:04:47,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 49 transitions, 196 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 23:04:47,516 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 127 flow [2023-11-06 23:04:47,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2023-11-06 23:04:47,522 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2023-11-06 23:04:47,522 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 127 flow [2023-11-06 23:04:47,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:47,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:47,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:04:47,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:47,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:04:47,724 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:04:47,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:47,725 INFO L85 PathProgramCache]: Analyzing trace with hash 24008, now seen corresponding path program 1 times [2023-11-06 23:04:47,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:04:47,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699275860] [2023-11-06 23:04:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:47,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:04:47,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:04:47,767 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:04:47,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-06 23:04:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:47,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:04:47,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:47,859 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 23:04:47,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:47,867 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:04:47,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:47,878 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:04:47,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:47,896 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:04:47,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:47,907 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:04:47,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:47,914 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:04:47,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:47,940 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:04:47,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:47,950 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:04:47,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:47,969 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:04:47,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:47,978 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:04:48,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:48,010 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 23:04:48,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:48,030 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:04:48,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:48,040 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:04:48,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:48,048 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:04:48,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:48,066 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:04:48,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:48,075 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:04:48,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:48,085 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:04:48,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:48,091 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:04:48,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:48,127 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:04:48,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:48,133 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:04:48,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:48,151 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:04:48,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:48,161 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:04:48,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:48,169 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:04:48,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:48,178 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 23:04:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:48,183 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:48,183 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:04:48,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699275860] [2023-11-06 23:04:48,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699275860] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:48,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:48,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:04:48,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565273911] [2023-11-06 23:04:48,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:48,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:04:48,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:04:48,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:04:48,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:48,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 370 [2023-11-06 23:04:48,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:48,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:48,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 370 [2023-11-06 23:04:48,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:49,015 INFO L124 PetriNetUnfolderBase]: 2720/3468 cut-off events. [2023-11-06 23:04:49,015 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-06 23:04:49,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6955 conditions, 3468 events. 2720/3468 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 14066 event pairs, 1294 based on Foata normal form. 2/900 useless extension candidates. Maximal degree in co-relation 6917. Up to 3435 conditions per place. [2023-11-06 23:04:49,048 INFO L140 encePairwiseOnDemand]: 365/370 looper letters, 37 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2023-11-06 23:04:49,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 213 flow [2023-11-06 23:04:49,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:04:49,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:04:49,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 506 transitions. [2023-11-06 23:04:49,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45585585585585586 [2023-11-06 23:04:49,052 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 506 transitions. [2023-11-06 23:04:49,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 506 transitions. [2023-11-06 23:04:49,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:49,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 506 transitions. [2023-11-06 23:04:49,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:49,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:49,061 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:49,061 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 127 flow. Second operand 3 states and 506 transitions. [2023-11-06 23:04:49,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 213 flow [2023-11-06 23:04:49,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 206 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 23:04:49,086 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 132 flow [2023-11-06 23:04:49,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2023-11-06 23:04:49,087 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2023-11-06 23:04:49,087 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 132 flow [2023-11-06 23:04:49,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:49,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:49,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:04:49,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:49,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:04:49,300 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:04:49,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:49,301 INFO L85 PathProgramCache]: Analyzing trace with hash 24096, now seen corresponding path program 1 times [2023-11-06 23:04:49,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:04:49,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356256103] [2023-11-06 23:04:49,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:49,302 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:04:49,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:04:49,303 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:04:49,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-06 23:04:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:49,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:04:49,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:49,410 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:49,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:04:49,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356256103] [2023-11-06 23:04:49,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356256103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:49,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:49,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:04:49,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782760514] [2023-11-06 23:04:49,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:49,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:04:49,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:04:49,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:04:49,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:49,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 370 [2023-11-06 23:04:49,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:49,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:49,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 370 [2023-11-06 23:04:49,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:50,218 INFO L124 PetriNetUnfolderBase]: 2717/3465 cut-off events. [2023-11-06 23:04:50,219 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 23:04:50,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6945 conditions, 3465 events. 2717/3465 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 14125 event pairs, 1294 based on Foata normal form. 1/900 useless extension candidates. Maximal degree in co-relation 6917. Up to 3435 conditions per place. [2023-11-06 23:04:50,249 INFO L140 encePairwiseOnDemand]: 365/370 looper letters, 39 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-11-06 23:04:50,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 196 flow [2023-11-06 23:04:50,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:04:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:04:50,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2023-11-06 23:04:50,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46126126126126127 [2023-11-06 23:04:50,252 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2023-11-06 23:04:50,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2023-11-06 23:04:50,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:50,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2023-11-06 23:04:50,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:50,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:50,259 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:50,260 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 132 flow. Second operand 3 states and 512 transitions. [2023-11-06 23:04:50,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 196 flow [2023-11-06 23:04:50,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 44 transitions, 188 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:04:50,263 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 110 flow [2023-11-06 23:04:50,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-11-06 23:04:50,265 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2023-11-06 23:04:50,265 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 110 flow [2023-11-06 23:04:50,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:50,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:50,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 23:04:50,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:50,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:04:50,478 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:04:50,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:50,478 INFO L85 PathProgramCache]: Analyzing trace with hash 746799, now seen corresponding path program 1 times [2023-11-06 23:04:50,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:04:50,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619301246] [2023-11-06 23:04:50,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:50,479 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 23:04:50,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:04:50,485 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:04:50,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-06 23:04:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:50,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:04:50,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:50,637 INFO L322 Elim1Store]: treesize reduction 103, result has 12.7 percent of original size [2023-11-06 23:04:50,637 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 23:04:50,698 INFO L322 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2023-11-06 23:04:50,699 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 23:04:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:50,895 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:50,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:04:50,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619301246] [2023-11-06 23:04:50,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619301246] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:50,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:50,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:04:50,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436257552] [2023-11-06 23:04:50,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:50,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:04:50,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:04:50,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:04:50,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:51,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 370 [2023-11-06 23:04:51,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:51,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:51,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 370 [2023-11-06 23:04:51,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:51,810 INFO L124 PetriNetUnfolderBase]: 2142/2764 cut-off events. [2023-11-06 23:04:51,811 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-06 23:04:51,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5540 conditions, 2764 events. 2142/2764 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 11275 event pairs, 1019 based on Foata normal form. 0/773 useless extension candidates. Maximal degree in co-relation 5529. Up to 2734 conditions per place. [2023-11-06 23:04:51,838 INFO L140 encePairwiseOnDemand]: 367/370 looper letters, 38 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-11-06 23:04:51,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 42 transitions, 182 flow [2023-11-06 23:04:51,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:04:51,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:04:51,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 505 transitions. [2023-11-06 23:04:51,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45495495495495497 [2023-11-06 23:04:51,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 505 transitions. [2023-11-06 23:04:51,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 505 transitions. [2023-11-06 23:04:51,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:51,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 505 transitions. [2023-11-06 23:04:51,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:51,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:51,850 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:51,850 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 110 flow. Second operand 3 states and 505 transitions. [2023-11-06 23:04:51,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 42 transitions, 182 flow [2023-11-06 23:04:51,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:04:51,853 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 102 flow [2023-11-06 23:04:51,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=100, 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=102, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-11-06 23:04:51,854 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -12 predicate places. [2023-11-06 23:04:51,854 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 102 flow [2023-11-06 23:04:51,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:51,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:51,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 23:04:51,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:52,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:04:52,067 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:04:52,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:52,068 INFO L85 PathProgramCache]: Analyzing trace with hash 746798, now seen corresponding path program 1 times [2023-11-06 23:04:52,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:04:52,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538514101] [2023-11-06 23:04:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:52,069 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:04:52,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:04:52,070 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:04:52,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-06 23:04:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:52,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:04:52,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:52,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:52,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:52,224 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 23:04:52,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:52,238 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-06 23:04:52,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:52,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:52,318 INFO L322 Elim1Store]: treesize reduction 19, result has 13.6 percent of original size [2023-11-06 23:04:52,318 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 3 [2023-11-06 23:04:52,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:52,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:52,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:52,337 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 11 treesize of output 7 [2023-11-06 23:04:52,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:52,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:52,387 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:04:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:52,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:52,589 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:04:52,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538514101] [2023-11-06 23:04:52,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538514101] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:52,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:04:52,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-11-06 23:04:52,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232815834] [2023-11-06 23:04:52,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:52,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:04:52,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:04:52,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:04:52,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:04:53,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 370 [2023-11-06 23:04:53,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:53,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:53,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 370 [2023-11-06 23:04:53,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:53,808 INFO L124 PetriNetUnfolderBase]: 1567/2063 cut-off events. [2023-11-06 23:04:53,808 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-06 23:04:53,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4136 conditions, 2063 events. 1567/2063 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 8358 event pairs, 744 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 4128. Up to 2033 conditions per place. [2023-11-06 23:04:53,828 INFO L140 encePairwiseOnDemand]: 367/370 looper letters, 36 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-11-06 23:04:53,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 170 flow [2023-11-06 23:04:53,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:04:53,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:04:53,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-11-06 23:04:53,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261261261261261 [2023-11-06 23:04:53,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-11-06 23:04:53,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-11-06 23:04:53,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:53,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-11-06 23:04:53,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:53,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:53,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:53,841 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 102 flow. Second operand 3 states and 473 transitions. [2023-11-06 23:04:53,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 170 flow [2023-11-06 23:04:53,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 169 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:04:53,844 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 97 flow [2023-11-06 23:04:53,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=95, 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=97, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-11-06 23:04:53,845 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -13 predicate places. [2023-11-06 23:04:53,845 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 97 flow [2023-11-06 23:04:53,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:53,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:53,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 23:04:53,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:54,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:04:54,064 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:04:54,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:54,065 INFO L85 PathProgramCache]: Analyzing trace with hash 746712, now seen corresponding path program 1 times [2023-11-06 23:04:54,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:04:54,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920921730] [2023-11-06 23:04:54,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:54,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:04:54,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:04:54,067 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:04:54,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-06 23:04:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:54,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:04:54,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:54,177 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-06 23:04:54,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,206 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:04:54,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,221 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:04:54,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,242 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:04:54,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,258 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:04:54,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,279 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:04:54,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,293 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 13 treesize of output 1 [2023-11-06 23:04:54,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,300 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 8 treesize of output 1 [2023-11-06 23:04:54,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,326 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:04:54,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:04:54,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,346 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:04:54,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,357 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:04:54,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,373 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:04:54,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,392 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:04:54,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,404 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:04:54,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,412 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:04:54,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,425 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 13 treesize of output 1 [2023-11-06 23:04:54,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,433 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:04:54,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,448 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:04:54,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,459 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:04:54,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,472 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:04:54,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,479 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:04:54,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,512 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:04:54,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:54,525 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:04:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:54,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:54,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:04:54,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1920921730] [2023-11-06 23:04:54,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1920921730] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:54,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:04:54,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 23:04:54,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492927330] [2023-11-06 23:04:54,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:54,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:04:54,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:04:54,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:04:54,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:04:55,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 370 [2023-11-06 23:04:55,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 97 flow. Second operand has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:55,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:55,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 370 [2023-11-06 23:04:55,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:56,938 INFO L124 PetriNetUnfolderBase]: 1570/2069 cut-off events. [2023-11-06 23:04:56,938 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-06 23:04:56,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4155 conditions, 2069 events. 1570/2069 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 8445 event pairs, 744 based on Foata normal form. 0/651 useless extension candidates. Maximal degree in co-relation 4146. Up to 2036 conditions per place. [2023-11-06 23:04:56,955 INFO L140 encePairwiseOnDemand]: 366/370 looper letters, 35 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2023-11-06 23:04:56,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 207 flow [2023-11-06 23:04:56,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:04:56,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:04:56,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 940 transitions. [2023-11-06 23:04:56,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42342342342342343 [2023-11-06 23:04:56,961 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 940 transitions. [2023-11-06 23:04:56,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 940 transitions. [2023-11-06 23:04:56,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:56,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 940 transitions. [2023-11-06 23:04:56,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.66666666666666) internal successors, (940), 6 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:56,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 370.0) internal successors, (2590), 7 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:56,972 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 370.0) internal successors, (2590), 7 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:56,972 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 97 flow. Second operand 6 states and 940 transitions. [2023-11-06 23:04:56,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 207 flow [2023-11-06 23:04:56,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:04:56,976 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 155 flow [2023-11-06 23:04:56,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=155, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-11-06 23:04:56,980 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -6 predicate places. [2023-11-06 23:04:56,980 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 155 flow [2023-11-06 23:04:56,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:56,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:56,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:04:56,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:57,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:04:57,194 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:04:57,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:57,194 INFO L85 PathProgramCache]: Analyzing trace with hash 717689183, now seen corresponding path program 1 times [2023-11-06 23:04:57,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:04:57,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1870972579] [2023-11-06 23:04:57,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:57,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:04:57,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:04:57,196 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:04:57,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-06 23:04:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:57,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:04:57,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:57,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:57,346 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 13 [2023-11-06 23:04:57,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:57,405 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:04:57,406 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-11-06 23:04:57,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:57,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:57,461 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 23:04:57,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:57,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:57,490 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 23:04:57,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:57,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:57,563 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 23:04:57,563 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2023-11-06 23:04:57,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:57,581 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 23:04:57,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:57,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:57,610 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 23:04:57,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:57,619 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 23:04:57,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:57,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:57,672 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 23:04:57,672 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 23:04:57,682 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 23:04:57,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:57,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:57,740 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 23:04:57,740 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 23:04:57,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:57,756 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 23:04:57,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:57,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:57,778 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 13 [2023-11-06 23:04:57,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:58,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:58,528 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:04:58,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1870972579] [2023-11-06 23:04:58,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1870972579] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:58,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:04:58,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-06 23:04:58,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098743506] [2023-11-06 23:04:58,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:58,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:04:58,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:04:58,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:04:58,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:05:00,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:05:01,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 370 [2023-11-06 23:05:01,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 155 flow. Second operand has 8 states, 8 states have (on average 145.25) internal successors, (1162), 8 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:01,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:01,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 370 [2023-11-06 23:05:01,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:04,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:05:04,860 INFO L124 PetriNetUnfolderBase]: 1483/1952 cut-off events. [2023-11-06 23:05:04,860 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 23:05:04,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3943 conditions, 1952 events. 1483/1952 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 7799 event pairs, 701 based on Foata normal form. 0/633 useless extension candidates. Maximal degree in co-relation 3930. Up to 1920 conditions per place. [2023-11-06 23:05:04,878 INFO L140 encePairwiseOnDemand]: 365/370 looper letters, 37 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2023-11-06 23:05:04,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 44 transitions, 233 flow [2023-11-06 23:05:04,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:05:04,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:05:04,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 759 transitions. [2023-11-06 23:05:04,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41027027027027024 [2023-11-06 23:05:04,884 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 759 transitions. [2023-11-06 23:05:04,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 759 transitions. [2023-11-06 23:05:04,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:04,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 759 transitions. [2023-11-06 23:05:04,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.8) internal successors, (759), 5 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:04,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 370.0) internal successors, (2220), 6 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:04,894 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 370.0) internal successors, (2220), 6 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:04,894 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 155 flow. Second operand 5 states and 759 transitions. [2023-11-06 23:05:04,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 44 transitions, 233 flow [2023-11-06 23:05:04,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 44 transitions, 213 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-06 23:05:04,899 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 139 flow [2023-11-06 23:05:04,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=139, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2023-11-06 23:05:04,900 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2023-11-06 23:05:04,900 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 139 flow [2023-11-06 23:05:04,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 145.25) internal successors, (1162), 8 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:04,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:04,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:05:04,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:05,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:05,114 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:05:05,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:05,114 INFO L85 PathProgramCache]: Analyzing trace with hash 717689184, now seen corresponding path program 1 times [2023-11-06 23:05:05,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:05:05,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502238936] [2023-11-06 23:05:05,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:05,115 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:05,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:05:05,116 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:05:05,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-06 23:05:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:05,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:05:05,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:05,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:05,299 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:05:05,300 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 23:05:05,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:05,374 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 23:05:05,374 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 23:05:05,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:05,422 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 23:05:05,423 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-06 23:05:05,464 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:05:05,465 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 23:05:05,497 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:05:05,498 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 23:05:05,537 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 23:05:05,537 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 23:05:05,565 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:05:05,565 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 23:05:05,599 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 23:05:05,600 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2023-11-06 23:05:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:05,816 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:05:05,816 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:05:05,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502238936] [2023-11-06 23:05:05,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502238936] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:05,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:05,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:05:05,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817455720] [2023-11-06 23:05:05,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:05,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:05:05,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:05:05,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:05:05,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:05:06,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 370 [2023-11-06 23:05:06,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:06,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:06,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 370 [2023-11-06 23:05:06,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:06,517 INFO L124 PetriNetUnfolderBase]: 1396/1835 cut-off events. [2023-11-06 23:05:06,518 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-06 23:05:06,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3704 conditions, 1835 events. 1396/1835 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 7245 event pairs, 658 based on Foata normal form. 0/613 useless extension candidates. Maximal degree in co-relation 3690. Up to 1805 conditions per place. [2023-11-06 23:05:06,534 INFO L140 encePairwiseOnDemand]: 367/370 looper letters, 38 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-11-06 23:05:06,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 42 transitions, 213 flow [2023-11-06 23:05:06,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:05:06,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:05:06,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-11-06 23:05:06,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44144144144144143 [2023-11-06 23:05:06,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-11-06 23:05:06,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-11-06 23:05:06,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:06,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-11-06 23:05:06,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:06,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:06,544 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:06,544 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 139 flow. Second operand 3 states and 490 transitions. [2023-11-06 23:05:06,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 42 transitions, 213 flow [2023-11-06 23:05:06,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 42 transitions, 207 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 23:05:06,549 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 131 flow [2023-11-06 23:05:06,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=47, 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=131, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2023-11-06 23:05:06,554 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -8 predicate places. [2023-11-06 23:05:06,554 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 131 flow [2023-11-06 23:05:06,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:06,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:06,555 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 23:05:06,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:06,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:06,768 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:05:06,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:06,769 INFO L85 PathProgramCache]: Analyzing trace with hash 772876681, now seen corresponding path program 2 times [2023-11-06 23:05:06,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:05:06,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096785306] [2023-11-06 23:05:06,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:05:06,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:06,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:05:06,771 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:05:06,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-06 23:05:06,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:05:06,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:06,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:05:06,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:06,915 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 23:05:06,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:06,932 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:06,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:06,942 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:06,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:06,954 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:06,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:06,980 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:06,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:06,991 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 13 treesize of output 1 [2023-11-06 23:05:07,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:07,023 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:07,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:07,036 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:07,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:07,069 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:07,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:07,107 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 23:05:07,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:07,134 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:07,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:07,146 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:07,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:07,158 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:07,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:07,171 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:07,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:07,180 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:07,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:07,192 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:07,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:07,208 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:07,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:07,233 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:07,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:07,244 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:07,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:07,256 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:07,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:07,280 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:07,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:07,296 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:07,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:07,309 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:07,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:07,321 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 13 treesize of output 1 [2023-11-06 23:05:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:07,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:08,246 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:05:08,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096785306] [2023-11-06 23:05:08,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096785306] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:08,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:08,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 23:05:08,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354046625] [2023-11-06 23:05:08,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:08,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:05:08,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:05:08,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:05:08,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:05:13,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 370 [2023-11-06 23:05:13,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 131 flow. Second operand has 12 states, 12 states have (on average 151.0) internal successors, (1812), 12 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:13,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:13,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 370 [2023-11-06 23:05:13,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:15,972 INFO L124 PetriNetUnfolderBase]: 1402/1847 cut-off events. [2023-11-06 23:05:15,972 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-06 23:05:15,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3751 conditions, 1847 events. 1402/1847 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 7313 event pairs, 658 based on Foata normal form. 6/625 useless extension candidates. Maximal degree in co-relation 3737. Up to 1808 conditions per place. [2023-11-06 23:05:15,985 INFO L140 encePairwiseOnDemand]: 366/370 looper letters, 31 selfloop transitions, 20 changer transitions 0/54 dead transitions. [2023-11-06 23:05:15,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 54 transitions, 305 flow [2023-11-06 23:05:15,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:05:15,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 23:05:15,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1857 transitions. [2023-11-06 23:05:15,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41824324324324325 [2023-11-06 23:05:15,994 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1857 transitions. [2023-11-06 23:05:15,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1857 transitions. [2023-11-06 23:05:15,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:15,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1857 transitions. [2023-11-06 23:05:16,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 154.75) internal successors, (1857), 12 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:16,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 370.0) internal successors, (4810), 13 states have internal predecessors, (4810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:16,013 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 370.0) internal successors, (4810), 13 states have internal predecessors, (4810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:16,013 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 131 flow. Second operand 12 states and 1857 transitions. [2023-11-06 23:05:16,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 54 transitions, 305 flow [2023-11-06 23:05:16,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 54 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:05:16,016 INFO L231 Difference]: Finished difference. Result has 65 places, 54 transitions, 276 flow [2023-11-06 23:05:16,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=276, PETRI_PLACES=65, PETRI_TRANSITIONS=54} [2023-11-06 23:05:16,017 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 8 predicate places. [2023-11-06 23:05:16,017 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 54 transitions, 276 flow [2023-11-06 23:05:16,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 151.0) internal successors, (1812), 12 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:16,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:16,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:05:16,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:16,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:16,231 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:05:16,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:16,231 INFO L85 PathProgramCache]: Analyzing trace with hash 773522785, now seen corresponding path program 1 times [2023-11-06 23:05:16,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:05:16,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348727074] [2023-11-06 23:05:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:16,232 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:16,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:05:16,233 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:05:16,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-06 23:05:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:16,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:05:16,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:16,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:16,624 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-11-06 23:05:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:16,721 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:05:16,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348727074] [2023-11-06 23:05:16,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348727074] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:16,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:16,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 23:05:16,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798320060] [2023-11-06 23:05:16,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:16,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:05:16,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:05:16,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:05:16,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:05:19,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 370 [2023-11-06 23:05:19,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 54 transitions, 276 flow. Second operand has 10 states, 10 states have (on average 147.2) internal successors, (1472), 10 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:19,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:19,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 370 [2023-11-06 23:05:19,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:20,743 INFO L124 PetriNetUnfolderBase]: 1760/2349 cut-off events. [2023-11-06 23:05:20,743 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-06 23:05:20,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4815 conditions, 2349 events. 1760/2349 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 10179 event pairs, 668 based on Foata normal form. 0/868 useless extension candidates. Maximal degree in co-relation 4794. Up to 1692 conditions per place. [2023-11-06 23:05:20,760 INFO L140 encePairwiseOnDemand]: 363/370 looper letters, 54 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2023-11-06 23:05:20,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 72 transitions, 454 flow [2023-11-06 23:05:20,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:05:20,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:05:20,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1077 transitions. [2023-11-06 23:05:20,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4158301158301158 [2023-11-06 23:05:20,766 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1077 transitions. [2023-11-06 23:05:20,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1077 transitions. [2023-11-06 23:05:20,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:20,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1077 transitions. [2023-11-06 23:05:20,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.85714285714286) internal successors, (1077), 7 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:20,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 370.0) internal successors, (2960), 8 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:20,778 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 370.0) internal successors, (2960), 8 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:20,778 INFO L175 Difference]: Start difference. First operand has 65 places, 54 transitions, 276 flow. Second operand 7 states and 1077 transitions. [2023-11-06 23:05:20,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 72 transitions, 454 flow [2023-11-06 23:05:20,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 374 flow, removed 32 selfloop flow, removed 5 redundant places. [2023-11-06 23:05:20,783 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 241 flow [2023-11-06 23:05:20,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=241, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2023-11-06 23:05:20,784 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2023-11-06 23:05:20,784 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 241 flow [2023-11-06 23:05:20,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 147.2) internal successors, (1472), 10 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:20,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:20,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:05:20,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:20,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:20,996 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:05:20,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:20,997 INFO L85 PathProgramCache]: Analyzing trace with hash 773522784, now seen corresponding path program 1 times [2023-11-06 23:05:20,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:05:20,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144681392] [2023-11-06 23:05:20,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:20,997 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:20,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:05:20,999 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:05:21,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-06 23:05:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:21,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:05:21,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:21,099 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 23:05:21,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,110 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:05:21,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,117 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:05:21,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,127 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:05:21,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,150 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:05:21,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,162 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:05:21,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,196 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 23:05:21,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,213 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:05:21,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,223 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:05:21,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,238 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:05:21,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,249 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:05:21,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,266 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:05:21,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,277 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:05:21,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,293 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:05:21,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,303 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:05:21,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,309 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:05:21,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,318 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 23:05:21,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,324 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:05:21,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,332 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:05:21,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,340 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:05:21,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,358 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:05:21,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,367 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:05:21,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,376 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:05:21,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:21,382 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:05:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:21,407 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:05:21,407 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:05:21,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144681392] [2023-11-06 23:05:21,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144681392] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:21,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:21,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:05:21,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054155083] [2023-11-06 23:05:21,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:21,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:05:21,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:05:21,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:05:21,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:05:21,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 370 [2023-11-06 23:05:21,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:21,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:21,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 370 [2023-11-06 23:05:21,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:22,026 INFO L124 PetriNetUnfolderBase]: 685/949 cut-off events. [2023-11-06 23:05:22,026 INFO L125 PetriNetUnfolderBase]: For 148/191 co-relation queries the response was YES. [2023-11-06 23:05:22,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2291 conditions, 949 events. 685/949 cut-off events. For 148/191 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3517 event pairs, 335 based on Foata normal form. 132/549 useless extension candidates. Maximal degree in co-relation 2269. Up to 916 conditions per place. [2023-11-06 23:05:22,034 INFO L140 encePairwiseOnDemand]: 365/370 looper letters, 39 selfloop transitions, 11 changer transitions 0/53 dead transitions. [2023-11-06 23:05:22,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 53 transitions, 335 flow [2023-11-06 23:05:22,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:05:22,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:05:22,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 632 transitions. [2023-11-06 23:05:22,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42702702702702705 [2023-11-06 23:05:22,038 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 632 transitions. [2023-11-06 23:05:22,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 632 transitions. [2023-11-06 23:05:22,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:22,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 632 transitions. [2023-11-06 23:05:22,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:22,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 370.0) internal successors, (1850), 5 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:22,044 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 370.0) internal successors, (1850), 5 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:22,045 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 241 flow. Second operand 4 states and 632 transitions. [2023-11-06 23:05:22,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 53 transitions, 335 flow [2023-11-06 23:05:22,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 53 transitions, 314 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-06 23:05:22,048 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 236 flow [2023-11-06 23:05:22,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=236, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2023-11-06 23:05:22,049 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2023-11-06 23:05:22,049 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 236 flow [2023-11-06 23:05:22,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:22,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:22,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:22,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 23:05:22,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:22,261 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:05:22,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:22,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1790410653, now seen corresponding path program 1 times [2023-11-06 23:05:22,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:05:22,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722455753] [2023-11-06 23:05:22,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:22,263 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:22,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:05:22,264 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:05:22,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-06 23:05:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:22,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:05:22,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:22,449 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:05:22,450 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2023-11-06 23:05:22,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:22,490 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 23:05:22,490 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 23:05:22,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:22,539 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 23:05:22,539 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 23:05:22,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:22,613 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 23:05:22,614 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2023-11-06 23:05:22,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:22,674 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 23:05:22,674 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 23:05:22,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:22,727 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 23:05:22,727 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 23:05:22,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:22,761 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 23:05:22,761 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 23:05:22,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:22,806 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 23:05:22,807 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 23:05:22,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:22,839 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 23:05:22,840 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 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 23:05:22,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:22,888 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 23:05:22,888 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 23:05:22,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:22,921 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 23:05:22,921 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 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 23:05:22,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:22,952 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 23:05:22,953 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 23:05:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:23,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:23,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:23,914 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:05:23,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722455753] [2023-11-06 23:05:23,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722455753] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:23,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:23,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-06 23:05:23,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009163808] [2023-11-06 23:05:23,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:23,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:05:23,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:05:23,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:05:23,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:05:25,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:05:26,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 370 [2023-11-06 23:05:26,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 236 flow. Second operand has 8 states, 8 states have (on average 145.75) internal successors, (1166), 8 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:26,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:26,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 370 [2023-11-06 23:05:26,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:27,632 INFO L124 PetriNetUnfolderBase]: 638/882 cut-off events. [2023-11-06 23:05:27,632 INFO L125 PetriNetUnfolderBase]: For 158/197 co-relation queries the response was YES. [2023-11-06 23:05:27,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2005 conditions, 882 events. 638/882 cut-off events. For 158/197 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3229 event pairs, 311 based on Foata normal form. 39/478 useless extension candidates. Maximal degree in co-relation 1983. Up to 860 conditions per place. [2023-11-06 23:05:27,639 INFO L140 encePairwiseOnDemand]: 365/370 looper letters, 44 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-11-06 23:05:27,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 51 transitions, 328 flow [2023-11-06 23:05:27,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:05:27,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:05:27,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 752 transitions. [2023-11-06 23:05:27,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064864864864865 [2023-11-06 23:05:27,644 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 752 transitions. [2023-11-06 23:05:27,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 752 transitions. [2023-11-06 23:05:27,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:27,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 752 transitions. [2023-11-06 23:05:27,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.4) internal successors, (752), 5 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:27,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 370.0) internal successors, (2220), 6 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:27,652 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 370.0) internal successors, (2220), 6 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:27,652 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 236 flow. Second operand 5 states and 752 transitions. [2023-11-06 23:05:27,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 51 transitions, 328 flow [2023-11-06 23:05:27,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 51 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:05:27,656 INFO L231 Difference]: Finished difference. Result has 63 places, 51 transitions, 228 flow [2023-11-06 23:05:27,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=228, PETRI_PLACES=63, PETRI_TRANSITIONS=51} [2023-11-06 23:05:27,657 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2023-11-06 23:05:27,657 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 51 transitions, 228 flow [2023-11-06 23:05:27,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 145.75) internal successors, (1166), 8 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:27,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:27,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:27,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 23:05:27,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:27,870 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:05:27,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:27,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1790410652, now seen corresponding path program 1 times [2023-11-06 23:05:27,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:05:27,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587378160] [2023-11-06 23:05:27,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:27,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:27,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:05:27,873 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:05:27,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-06 23:05:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:28,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:05:28,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:28,024 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:05:28,024 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 23:05:28,050 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:05:28,050 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 23:05:28,072 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:05:28,072 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 23:05:28,108 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:05:28,108 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 23:05:28,138 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:05:28,139 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 23:05:28,170 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:05:28,170 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 23:05:28,206 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:05:28,206 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 23:05:28,247 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:05:28,247 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-06 23:05:28,280 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:05:28,280 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 23:05:28,302 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:05:28,303 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 23:05:28,338 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:05:28,339 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 23:05:28,366 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:05:28,366 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 23:05:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:28,535 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:05:28,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:05:28,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587378160] [2023-11-06 23:05:28,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587378160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:28,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:28,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:05:28,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15406161] [2023-11-06 23:05:28,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:28,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:05:28,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:05:28,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:05:28,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:05:28,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 370 [2023-11-06 23:05:28,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 51 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:28,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:28,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 370 [2023-11-06 23:05:28,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:29,003 INFO L124 PetriNetUnfolderBase]: 591/815 cut-off events. [2023-11-06 23:05:29,003 INFO L125 PetriNetUnfolderBase]: For 131/166 co-relation queries the response was YES. [2023-11-06 23:05:29,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1858 conditions, 815 events. 591/815 cut-off events. For 131/166 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2913 event pairs, 287 based on Foata normal form. 35/452 useless extension candidates. Maximal degree in co-relation 1836. Up to 795 conditions per place. [2023-11-06 23:05:29,007 INFO L140 encePairwiseOnDemand]: 367/370 looper letters, 45 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-11-06 23:05:29,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 49 transitions, 316 flow [2023-11-06 23:05:29,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:05:29,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:05:29,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2023-11-06 23:05:29,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43513513513513513 [2023-11-06 23:05:29,012 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2023-11-06 23:05:29,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2023-11-06 23:05:29,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:29,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2023-11-06 23:05:29,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:29,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:29,018 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:29,018 INFO L175 Difference]: Start difference. First operand has 63 places, 51 transitions, 228 flow. Second operand 3 states and 483 transitions. [2023-11-06 23:05:29,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 49 transitions, 316 flow [2023-11-06 23:05:29,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 49 transitions, 310 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 23:05:29,021 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 220 flow [2023-11-06 23:05:29,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-11-06 23:05:29,023 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2023-11-06 23:05:29,023 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 220 flow [2023-11-06 23:05:29,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:29,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:29,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:29,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 23:05:29,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:29,236 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:05:29,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:29,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1790594231, now seen corresponding path program 1 times [2023-11-06 23:05:29,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:05:29,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766425067] [2023-11-06 23:05:29,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:29,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:29,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:05:29,239 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:05:29,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 23:05:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:29,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:05:29,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:29,375 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-06 23:05:29,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,409 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 23:05:29,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,429 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:29,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,440 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:29,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,459 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:29,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,469 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:29,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,490 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:29,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,501 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:29,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,512 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:29,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,519 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:29,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,529 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:29,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,535 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:29,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,546 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:29,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,552 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:29,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,573 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:29,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,585 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:29,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,595 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:29,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,601 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:29,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,613 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:29,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,632 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:29,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,643 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 13 treesize of output 1 [2023-11-06 23:05:29,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,651 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:29,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,661 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:29,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,668 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:29,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:30,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:05:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766425067] [2023-11-06 23:05:30,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766425067] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:30,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:30,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 23:05:30,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828869783] [2023-11-06 23:05:30,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:30,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:05:30,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:05:30,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:05:30,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:05:33,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 370 [2023-11-06 23:05:33,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 220 flow. Second operand has 10 states, 10 states have (on average 148.4) internal successors, (1484), 10 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:33,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:33,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 370 [2023-11-06 23:05:33,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:35,289 INFO L124 PetriNetUnfolderBase]: 1434/1909 cut-off events. [2023-11-06 23:05:35,289 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2023-11-06 23:05:35,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4326 conditions, 1909 events. 1434/1909 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 7749 event pairs, 112 based on Foata normal form. 42/989 useless extension candidates. Maximal degree in co-relation 4304. Up to 856 conditions per place. [2023-11-06 23:05:35,301 INFO L140 encePairwiseOnDemand]: 364/370 looper letters, 94 selfloop transitions, 19 changer transitions 0/115 dead transitions. [2023-11-06 23:05:35,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 115 transitions, 601 flow [2023-11-06 23:05:35,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:05:35,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:05:35,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1421 transitions. [2023-11-06 23:05:35,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42672672672672673 [2023-11-06 23:05:35,309 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1421 transitions. [2023-11-06 23:05:35,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1421 transitions. [2023-11-06 23:05:35,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:35,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1421 transitions. [2023-11-06 23:05:35,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 157.88888888888889) internal successors, (1421), 9 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:35,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 370.0) internal successors, (3700), 10 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:35,323 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 370.0) internal successors, (3700), 10 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:35,323 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 220 flow. Second operand 9 states and 1421 transitions. [2023-11-06 23:05:35,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 115 transitions, 601 flow [2023-11-06 23:05:35,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 115 transitions, 600 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:05:35,328 INFO L231 Difference]: Finished difference. Result has 70 places, 54 transitions, 296 flow [2023-11-06 23:05:35,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=296, PETRI_PLACES=70, PETRI_TRANSITIONS=54} [2023-11-06 23:05:35,329 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2023-11-06 23:05:35,329 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 54 transitions, 296 flow [2023-11-06 23:05:35,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 148.4) internal successors, (1484), 10 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:35,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:35,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:35,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 23:05:35,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:35,543 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:05:35,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:35,543 INFO L85 PathProgramCache]: Analyzing trace with hash 331839239, now seen corresponding path program 1 times [2023-11-06 23:05:35,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:05:35,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190861459] [2023-11-06 23:05:35,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:35,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:35,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:05:35,546 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:05:35,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 23:05:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:35,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:05:35,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:35,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:36,061 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-11-06 23:05:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:36,158 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:05:36,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190861459] [2023-11-06 23:05:36,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190861459] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:36,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:36,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 23:05:36,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651256681] [2023-11-06 23:05:36,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:36,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:05:36,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:05:36,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:05:36,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:05:38,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 370 [2023-11-06 23:05:38,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 54 transitions, 296 flow. Second operand has 10 states, 10 states have (on average 147.6) internal successors, (1476), 10 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:38,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:38,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 370 [2023-11-06 23:05:38,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:39,653 INFO L124 PetriNetUnfolderBase]: 1504/2034 cut-off events. [2023-11-06 23:05:39,653 INFO L125 PetriNetUnfolderBase]: For 1692/1786 co-relation queries the response was YES. [2023-11-06 23:05:39,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5562 conditions, 2034 events. 1504/2034 cut-off events. For 1692/1786 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 8276 event pairs, 668 based on Foata normal form. 94/1329 useless extension candidates. Maximal degree in co-relation 5536. Up to 1632 conditions per place. [2023-11-06 23:05:39,670 INFO L140 encePairwiseOnDemand]: 363/370 looper letters, 56 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2023-11-06 23:05:39,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 74 transitions, 533 flow [2023-11-06 23:05:39,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:05:39,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:05:39,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1065 transitions. [2023-11-06 23:05:39,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111969111969112 [2023-11-06 23:05:39,676 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1065 transitions. [2023-11-06 23:05:39,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1065 transitions. [2023-11-06 23:05:39,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:39,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1065 transitions. [2023-11-06 23:05:39,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 152.14285714285714) internal successors, (1065), 7 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:39,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 370.0) internal successors, (2960), 8 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:39,686 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 370.0) internal successors, (2960), 8 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:39,686 INFO L175 Difference]: Start difference. First operand has 70 places, 54 transitions, 296 flow. Second operand 7 states and 1065 transitions. [2023-11-06 23:05:39,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 74 transitions, 533 flow [2023-11-06 23:05:39,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 74 transitions, 482 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-11-06 23:05:39,692 INFO L231 Difference]: Finished difference. Result has 74 places, 56 transitions, 309 flow [2023-11-06 23:05:39,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=309, PETRI_PLACES=74, PETRI_TRANSITIONS=56} [2023-11-06 23:05:39,693 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2023-11-06 23:05:39,693 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 56 transitions, 309 flow [2023-11-06 23:05:39,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 147.6) internal successors, (1476), 10 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:39,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:39,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:39,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:39,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:39,906 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:05:39,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:39,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1697084635, now seen corresponding path program 1 times [2023-11-06 23:05:39,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:05:39,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000374844] [2023-11-06 23:05:39,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:39,907 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:39,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:05:39,908 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:05:39,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 23:05:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:40,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:05:40,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:40,028 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 13 treesize of output 7 [2023-11-06 23:05:40,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,038 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:40,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,049 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:40,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,069 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:40,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,079 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:40,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,085 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:40,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,097 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:40,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,104 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:40,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,111 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:40,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,121 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 13 treesize of output 1 [2023-11-06 23:05:40,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,143 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:40,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,154 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:40,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,175 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:40,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,209 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 23:05:40,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,225 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:40,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,246 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:40,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,278 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:40,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,290 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:40,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,327 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:40,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:40,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,347 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 13 treesize of output 1 [2023-11-06 23:05:40,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,353 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:40,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,360 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:40,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:40,369 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:40,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:40,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:41,161 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:05:41,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000374844] [2023-11-06 23:05:41,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000374844] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:41,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:41,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 23:05:41,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694236356] [2023-11-06 23:05:41,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:41,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:05:41,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:05:41,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:05:41,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:05:45,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 370 [2023-11-06 23:05:45,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 56 transitions, 309 flow. Second operand has 10 states, 10 states have (on average 146.8) internal successors, (1468), 10 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:45,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:45,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 370 [2023-11-06 23:05:45,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:47,788 INFO L124 PetriNetUnfolderBase]: 2644/3462 cut-off events. [2023-11-06 23:05:47,788 INFO L125 PetriNetUnfolderBase]: For 2300/2454 co-relation queries the response was YES. [2023-11-06 23:05:47,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9872 conditions, 3462 events. 2644/3462 cut-off events. For 2300/2454 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 14514 event pairs, 668 based on Foata normal form. 154/2315 useless extension candidates. Maximal degree in co-relation 9845. Up to 1920 conditions per place. [2023-11-06 23:05:47,813 INFO L140 encePairwiseOnDemand]: 364/370 looper letters, 112 selfloop transitions, 20 changer transitions 0/134 dead transitions. [2023-11-06 23:05:47,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 134 transitions, 877 flow [2023-11-06 23:05:47,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:05:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:05:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1241 transitions. [2023-11-06 23:05:47,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4192567567567568 [2023-11-06 23:05:47,820 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1241 transitions. [2023-11-06 23:05:47,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1241 transitions. [2023-11-06 23:05:47,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:47,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1241 transitions. [2023-11-06 23:05:47,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 155.125) internal successors, (1241), 8 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:47,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 370.0) internal successors, (3330), 9 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:47,831 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 370.0) internal successors, (3330), 9 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:47,831 INFO L175 Difference]: Start difference. First operand has 74 places, 56 transitions, 309 flow. Second operand 8 states and 1241 transitions. [2023-11-06 23:05:47,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 134 transitions, 877 flow [2023-11-06 23:05:47,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 134 transitions, 846 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-06 23:05:47,843 INFO L231 Difference]: Finished difference. Result has 79 places, 62 transitions, 361 flow [2023-11-06 23:05:47,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=361, PETRI_PLACES=79, PETRI_TRANSITIONS=62} [2023-11-06 23:05:47,845 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 22 predicate places. [2023-11-06 23:05:47,845 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 62 transitions, 361 flow [2023-11-06 23:05:47,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 146.8) internal successors, (1468), 10 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:47,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:47,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:47,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:48,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:48,064 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:05:48,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:48,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1075588361, now seen corresponding path program 1 times [2023-11-06 23:05:48,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:05:48,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167391533] [2023-11-06 23:05:48,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:48,064 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:48,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:05:48,065 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:05:48,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 23:05:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:48,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 23:05:48,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:48,195 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:05:48,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,224 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:48,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,236 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:48,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,258 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:48,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,295 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 23:05:48,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,316 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:48,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,325 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:48,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:48,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,349 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:48,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,378 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 18 treesize of output 1 [2023-11-06 23:05:48,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,386 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:48,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,397 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:48,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,406 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:48,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,416 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:48,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,428 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:48,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,448 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:48,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,460 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:48,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,468 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:48,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,491 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:48,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,502 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:48,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,514 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:48,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,522 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:48,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,530 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:48,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:48,540 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:48,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:49,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:05:49,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167391533] [2023-11-06 23:05:49,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167391533] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:49,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:49,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 23:05:49,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080797005] [2023-11-06 23:05:49,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:49,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:05:49,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:05:49,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:05:49,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:05:53,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 370 [2023-11-06 23:05:53,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 62 transitions, 361 flow. Second operand has 10 states, 10 states have (on average 141.0) internal successors, (1410), 10 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:53,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:53,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 370 [2023-11-06 23:05:53,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:58,150 INFO L124 PetriNetUnfolderBase]: 7883/10467 cut-off events. [2023-11-06 23:05:58,150 INFO L125 PetriNetUnfolderBase]: For 19959/21151 co-relation queries the response was YES. [2023-11-06 23:05:58,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35976 conditions, 10467 events. 7883/10467 cut-off events. For 19959/21151 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 48767 event pairs, 3867 based on Foata normal form. 1192/9552 useless extension candidates. Maximal degree in co-relation 35946. Up to 3829 conditions per place. [2023-11-06 23:05:58,256 INFO L140 encePairwiseOnDemand]: 362/370 looper letters, 203 selfloop transitions, 15 changer transitions 0/220 dead transitions. [2023-11-06 23:05:58,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 220 transitions, 1567 flow [2023-11-06 23:05:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 23:05:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 23:05:58,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1647 transitions. [2023-11-06 23:05:58,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40466830466830467 [2023-11-06 23:05:58,264 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1647 transitions. [2023-11-06 23:05:58,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1647 transitions. [2023-11-06 23:05:58,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:58,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1647 transitions. [2023-11-06 23:05:58,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 149.72727272727272) internal successors, (1647), 11 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:58,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 370.0) internal successors, (4440), 12 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:58,277 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 370.0) internal successors, (4440), 12 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:58,277 INFO L175 Difference]: Start difference. First operand has 79 places, 62 transitions, 361 flow. Second operand 11 states and 1647 transitions. [2023-11-06 23:05:58,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 220 transitions, 1567 flow [2023-11-06 23:05:58,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 220 transitions, 1434 flow, removed 54 selfloop flow, removed 3 redundant places. [2023-11-06 23:05:58,316 INFO L231 Difference]: Finished difference. Result has 88 places, 68 transitions, 390 flow [2023-11-06 23:05:58,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=390, PETRI_PLACES=88, PETRI_TRANSITIONS=68} [2023-11-06 23:05:58,317 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 31 predicate places. [2023-11-06 23:05:58,317 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 68 transitions, 390 flow [2023-11-06 23:05:58,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 141.0) internal successors, (1410), 10 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:58,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:58,318 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:58,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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)] Ended with exit code 0 [2023-11-06 23:05:58,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:58,530 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:05:58,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:58,531 INFO L85 PathProgramCache]: Analyzing trace with hash -95731871, now seen corresponding path program 2 times [2023-11-06 23:05:58,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:05:58,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315396341] [2023-11-06 23:05:58,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:05:58,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:05:58,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:05:58,532 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:05:58,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 23:05:58,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:05:58,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:58,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 23:05:58,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:58,684 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:05:58,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:58,715 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:58,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:58,750 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:58,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:58,793 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 23:05:58,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:58,808 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:58,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:58,833 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:58,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:58,855 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:58,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:58,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:58,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:58,893 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 8 treesize of output 1 [2023-11-06 23:05:58,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:58,916 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:58,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:58,929 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:58,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:58,938 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:58,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:58,954 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:58,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:58,980 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:05:58,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:58,994 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:59,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:59,003 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:59,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:59,017 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:59,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:59,026 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:59,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:59,041 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:59,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:59,050 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:59,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:59,060 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:05:59,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:59,073 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:59,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:59,087 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:05:59,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:59,113 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 18 treesize of output 1 [2023-11-06 23:05:59,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:59,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:00,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:06:00,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315396341] [2023-11-06 23:06:00,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315396341] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:00,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:06:00,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-11-06 23:06:00,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428780493] [2023-11-06 23:06:00,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:00,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:06:00,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:06:00,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:06:00,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:06:16,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 370 [2023-11-06 23:06:16,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 68 transitions, 390 flow. Second operand has 18 states, 18 states have (on average 141.11111111111111) internal successors, (2540), 18 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:16,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:16,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 370 [2023-11-06 23:06:16,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:24,286 INFO L124 PetriNetUnfolderBase]: 6490/8591 cut-off events. [2023-11-06 23:06:24,287 INFO L125 PetriNetUnfolderBase]: For 12107/12841 co-relation queries the response was YES. [2023-11-06 23:06:24,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30644 conditions, 8591 events. 6490/8591 cut-off events. For 12107/12841 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40580 event pairs, 2245 based on Foata normal form. 892/7609 useless extension candidates. Maximal degree in co-relation 30612. Up to 3353 conditions per place. [2023-11-06 23:06:24,363 INFO L140 encePairwiseOnDemand]: 362/370 looper letters, 257 selfloop transitions, 22 changer transitions 0/283 dead transitions. [2023-11-06 23:06:24,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 283 transitions, 1920 flow [2023-11-06 23:06:24,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 23:06:24,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 23:06:24,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2264 transitions. [2023-11-06 23:06:24,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079279279279279 [2023-11-06 23:06:24,374 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2264 transitions. [2023-11-06 23:06:24,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2264 transitions. [2023-11-06 23:06:24,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:24,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2264 transitions. [2023-11-06 23:06:24,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 150.93333333333334) internal successors, (2264), 15 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:24,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 370.0) internal successors, (5920), 16 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:24,393 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 370.0) internal successors, (5920), 16 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:24,393 INFO L175 Difference]: Start difference. First operand has 88 places, 68 transitions, 390 flow. Second operand 15 states and 2264 transitions. [2023-11-06 23:06:24,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 283 transitions, 1920 flow [2023-11-06 23:06:24,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 283 transitions, 1875 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-11-06 23:06:24,530 INFO L231 Difference]: Finished difference. Result has 100 places, 81 transitions, 502 flow [2023-11-06 23:06:24,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=502, PETRI_PLACES=100, PETRI_TRANSITIONS=81} [2023-11-06 23:06:24,531 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 43 predicate places. [2023-11-06 23:06:24,532 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 81 transitions, 502 flow [2023-11-06 23:06:24,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 141.11111111111111) internal successors, (2540), 18 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:24,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:24,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:24,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 23:06:24,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:06:24,752 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:06:24,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:24,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1016494580, now seen corresponding path program 1 times [2023-11-06 23:06:24,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:06:24,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617301911] [2023-11-06 23:06:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:24,753 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:06:24,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:06:24,754 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:06:24,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 23:06:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:24,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:06:24,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:25,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:25,411 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:06:25,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617301911] [2023-11-06 23:06:25,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617301911] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:25,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:06:25,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 23:06:25,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763082722] [2023-11-06 23:06:25,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:25,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:06:25,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:06:25,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:06:25,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:06:26,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 370 [2023-11-06 23:06:26,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 81 transitions, 502 flow. Second operand has 12 states, 12 states have (on average 147.83333333333334) internal successors, (1774), 12 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:26,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:26,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 370 [2023-11-06 23:06:26,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:28,730 INFO L124 PetriNetUnfolderBase]: 5864/7816 cut-off events. [2023-11-06 23:06:28,730 INFO L125 PetriNetUnfolderBase]: For 17579/18609 co-relation queries the response was YES. [2023-11-06 23:06:28,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30103 conditions, 7816 events. 5864/7816 cut-off events. For 17579/18609 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 34679 event pairs, 3300 based on Foata normal form. 1018/7721 useless extension candidates. Maximal degree in co-relation 30068. Up to 6869 conditions per place. [2023-11-06 23:06:28,784 INFO L140 encePairwiseOnDemand]: 362/370 looper letters, 128 selfloop transitions, 8 changer transitions 0/140 dead transitions. [2023-11-06 23:06:28,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 140 transitions, 1030 flow [2023-11-06 23:06:28,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:06:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:06:28,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1240 transitions. [2023-11-06 23:06:28,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4189189189189189 [2023-11-06 23:06:28,787 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1240 transitions. [2023-11-06 23:06:28,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1240 transitions. [2023-11-06 23:06:28,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:28,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1240 transitions. [2023-11-06 23:06:28,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 155.0) internal successors, (1240), 8 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:28,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 370.0) internal successors, (3330), 9 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:28,795 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 370.0) internal successors, (3330), 9 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:28,795 INFO L175 Difference]: Start difference. First operand has 100 places, 81 transitions, 502 flow. Second operand 8 states and 1240 transitions. [2023-11-06 23:06:28,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 140 transitions, 1030 flow [2023-11-06 23:06:28,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 140 transitions, 1008 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-06 23:06:28,877 INFO L231 Difference]: Finished difference. Result has 103 places, 81 transitions, 505 flow [2023-11-06 23:06:28,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=505, PETRI_PLACES=103, PETRI_TRANSITIONS=81} [2023-11-06 23:06:28,878 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2023-11-06 23:06:28,878 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 81 transitions, 505 flow [2023-11-06 23:06:28,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 147.83333333333334) internal successors, (1774), 12 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:28,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:28,879 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-11-06 23:06:28,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 23:06:29,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:06:29,090 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:06:29,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:29,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1910040791, now seen corresponding path program 3 times [2023-11-06 23:06:29,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:06:29,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745808406] [2023-11-06 23:06:29,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:06:29,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:06:29,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:06:29,093 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:06:29,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 23:06:29,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 23:06:29,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:29,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 23:06:29,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:29,312 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:06:29,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,322 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:06:29,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,332 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 13 treesize of output 1 [2023-11-06 23:06:29,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,338 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:06:29,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,350 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:06:29,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,368 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:06:29,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,379 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 13 treesize of output 1 [2023-11-06 23:06:29,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,385 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:06:29,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,397 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:06:29,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,404 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:06:29,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,426 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:06:29,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,438 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:06:29,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,463 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:06:29,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,474 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:06:29,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,484 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:06:29,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,503 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:06:29,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,536 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 23:06:29,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,554 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:06:29,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,566 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:06:29,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,583 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:06:29,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,593 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 13 treesize of output 1 [2023-11-06 23:06:29,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,600 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:06:29,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,610 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:06:29,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:29,616 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:06:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:30,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:33,379 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:06:33,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745808406] [2023-11-06 23:06:33,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745808406] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:33,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:06:33,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-11-06 23:06:33,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534355195] [2023-11-06 23:06:33,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:33,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 23:06:33,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:06:33,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 23:06:33,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-11-06 23:06:59,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 370 [2023-11-06 23:06:59,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 81 transitions, 505 flow. Second operand has 24 states, 24 states have (on average 151.0) internal successors, (3624), 24 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:59,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:59,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 370 [2023-11-06 23:06:59,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:18,277 INFO L124 PetriNetUnfolderBase]: 5471/7240 cut-off events. [2023-11-06 23:07:18,277 INFO L125 PetriNetUnfolderBase]: For 17264/18335 co-relation queries the response was YES. [2023-11-06 23:07:18,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29340 conditions, 7240 events. 5471/7240 cut-off events. For 17264/18335 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 32989 event pairs, 3053 based on Foata normal form. 1016/6936 useless extension candidates. Maximal degree in co-relation 29303. Up to 7183 conditions per place. [2023-11-06 23:07:18,337 INFO L140 encePairwiseOnDemand]: 366/370 looper letters, 54 selfloop transitions, 44 changer transitions 0/105 dead transitions. [2023-11-06 23:07:18,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 105 transitions, 893 flow [2023-11-06 23:07:18,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 23:07:18,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 23:07:18,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3680 transitions. [2023-11-06 23:07:18,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144144144144144 [2023-11-06 23:07:18,345 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3680 transitions. [2023-11-06 23:07:18,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3680 transitions. [2023-11-06 23:07:18,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:18,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3680 transitions. [2023-11-06 23:07:18,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 153.33333333333334) internal successors, (3680), 24 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:18,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 370.0) internal successors, (9250), 25 states have internal predecessors, (9250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:18,367 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 370.0) internal successors, (9250), 25 states have internal predecessors, (9250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:18,367 INFO L175 Difference]: Start difference. First operand has 103 places, 81 transitions, 505 flow. Second operand 24 states and 3680 transitions. [2023-11-06 23:07:18,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 105 transitions, 893 flow [2023-11-06 23:07:18,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 105 transitions, 876 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-06 23:07:18,459 INFO L231 Difference]: Finished difference. Result has 133 places, 105 transitions, 832 flow [2023-11-06 23:07:18,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=832, PETRI_PLACES=133, PETRI_TRANSITIONS=105} [2023-11-06 23:07:18,460 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 76 predicate places. [2023-11-06 23:07:18,460 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 105 transitions, 832 flow [2023-11-06 23:07:18,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 151.0) internal successors, (3624), 24 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:18,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:18,461 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:18,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 23:07:18,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:07:18,675 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:07:18,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:18,675 INFO L85 PathProgramCache]: Analyzing trace with hash -232521763, now seen corresponding path program 2 times [2023-11-06 23:07:18,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:07:18,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188806544] [2023-11-06 23:07:18,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:07:18,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:07:18,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:07:18,678 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:07:18,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 23:07:18,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:07:18,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:18,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 23:07:18,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:18,866 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-06 23:07:18,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:18,882 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:07:18,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:18,889 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:07:18,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:18,900 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:07:18,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:18,911 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:07:18,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:18,918 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:07:18,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:18,930 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:07:18,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:18,937 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:07:18,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:18,949 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:07:18,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:18,956 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:07:18,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:18,967 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:07:18,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:18,989 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:07:19,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:19,011 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:07:19,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:19,021 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:07:19,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:19,029 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:07:19,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:19,040 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 13 treesize of output 1 [2023-11-06 23:07:19,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:19,053 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:07:19,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:19,062 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:07:19,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:19,090 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:07:19,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:19,104 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:07:19,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:19,132 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:07:19,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:19,170 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 23:07:19,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:19,192 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:07:19,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:19,203 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:07:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:19,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:21,501 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:07:21,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188806544] [2023-11-06 23:07:21,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188806544] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:21,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:07:21,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-06 23:07:21,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150330329] [2023-11-06 23:07:21,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:21,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:07:21,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:07:21,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:07:21,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:07:37,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 370 [2023-11-06 23:07:37,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 105 transitions, 832 flow. Second operand has 14 states, 14 states have (on average 139.71428571428572) internal successors, (1956), 14 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:37,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:37,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 370 [2023-11-06 23:07:37,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:50,139 INFO L124 PetriNetUnfolderBase]: 12709/16759 cut-off events. [2023-11-06 23:07:50,140 INFO L125 PetriNetUnfolderBase]: For 39187/41286 co-relation queries the response was YES. [2023-11-06 23:07:50,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66761 conditions, 16759 events. 12709/16759 cut-off events. For 39187/41286 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 82169 event pairs, 5007 based on Foata normal form. 2074/16286 useless extension candidates. Maximal degree in co-relation 66712. Up to 6635 conditions per place. [2023-11-06 23:07:50,354 INFO L140 encePairwiseOnDemand]: 362/370 looper letters, 340 selfloop transitions, 27 changer transitions 0/371 dead transitions. [2023-11-06 23:07:50,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 371 transitions, 2979 flow [2023-11-06 23:07:50,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 23:07:50,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 23:07:50,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2519 transitions. [2023-11-06 23:07:50,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40047694753577107 [2023-11-06 23:07:50,360 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2519 transitions. [2023-11-06 23:07:50,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2519 transitions. [2023-11-06 23:07:50,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:50,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2519 transitions. [2023-11-06 23:07:50,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 148.1764705882353) internal successors, (2519), 17 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:50,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 370.0) internal successors, (6660), 18 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:50,370 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 370.0) internal successors, (6660), 18 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:50,370 INFO L175 Difference]: Start difference. First operand has 133 places, 105 transitions, 832 flow. Second operand 17 states and 2519 transitions. [2023-11-06 23:07:50,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 371 transitions, 2979 flow [2023-11-06 23:07:50,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 371 transitions, 2815 flow, removed 62 selfloop flow, removed 11 redundant places. [2023-11-06 23:07:50,673 INFO L231 Difference]: Finished difference. Result has 142 places, 114 transitions, 817 flow [2023-11-06 23:07:50,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=817, PETRI_PLACES=142, PETRI_TRANSITIONS=114} [2023-11-06 23:07:50,674 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 85 predicate places. [2023-11-06 23:07:50,674 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 114 transitions, 817 flow [2023-11-06 23:07:50,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 139.71428571428572) internal successors, (1956), 14 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:50,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:50,674 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2023-11-06 23:07:50,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 23:07:50,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:07:50,887 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-06 23:07:50,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:50,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2111255322, now seen corresponding path program 3 times [2023-11-06 23:07:50,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:07:50,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765969442] [2023-11-06 23:07:50,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:07:50,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:07:50,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:07:50,889 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:07:50,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c7ae56c-065c-425e-9121-2a2c52bba10f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 23:07:51,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 23:07:51,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:51,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 23:07:51,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:51,198 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:07:51,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,221 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:07:51,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,232 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:07:51,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,238 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:07:51,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,250 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:07:51,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,257 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:07:51,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,269 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:07:51,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,275 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:07:51,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,283 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:07:51,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,293 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 13 treesize of output 1 [2023-11-06 23:07:51,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,305 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:07:51,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,324 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:07:51,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,347 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 13 treesize of output 1 [2023-11-06 23:07:51,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,370 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:07:51,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,409 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 23:07:51,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,430 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:07:51,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,444 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:07:51,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,468 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:07:51,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,478 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:07:51,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,488 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:07:51,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,513 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:07:51,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,524 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:07:51,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,535 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:07:51,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:07:51,542 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:07:52,016 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-11-06 23:07:52,023 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 7 treesize of output 5 [2023-11-06 23:07:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:52,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:52,196 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 8 treesize of output 6 [2023-11-06 23:07:52,218 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-06 23:07:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:54,623 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:07:54,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765969442] [2023-11-06 23:07:54,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765969442] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:54,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:07:54,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-11-06 23:07:54,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999428571] [2023-11-06 23:07:54,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:54,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 23:07:54,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:07:54,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 23:07:54,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420