./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:38:29,898 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:38:30,021 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:38:30,029 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:38:30,030 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:38:30,077 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:38:30,078 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:38:30,078 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:38:30,079 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:38:30,084 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:38:30,085 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:38:30,086 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:38:30,086 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:38:30,088 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:38:30,089 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:38:30,089 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:38:30,090 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:38:30,090 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:38:30,090 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:38:30,091 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:38:30,091 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:38:30,092 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:38:30,092 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:38:30,093 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:38:30,093 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:38:30,094 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:38:30,095 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:38:30,095 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:38:30,096 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:38:30,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:38:30,097 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:38:30,098 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:38:30,098 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:38:30,098 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:38:30,105 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:38:30,106 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:38:30,106 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:38:30,106 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:38:30,106 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_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a [2023-11-19 07:38:30,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:38:30,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:38:30,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:38:30,452 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:38:30,453 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:38:30,454 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2023-11-19 07:38:33,501 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:38:33,743 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:38:33,744 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2023-11-19 07:38:33,754 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/data/a63e4c329/ee3499c66aca480b8cc8d7fd4d7044f5/FLAG7adda5895 [2023-11-19 07:38:33,769 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/data/a63e4c329/ee3499c66aca480b8cc8d7fd4d7044f5 [2023-11-19 07:38:33,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:38:33,773 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:38:33,777 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:38:33,777 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:38:33,781 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:38:33,782 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:38:33" (1/1) ... [2023-11-19 07:38:33,783 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2855cafe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:33, skipping insertion in model container [2023-11-19 07:38:33,784 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:38:33" (1/1) ... [2023-11-19 07:38:33,809 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:38:34,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:38:34,021 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) [2023-11-19 07:38:34,021 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4a92a12f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:34, skipping insertion in model container [2023-11-19 07:38:34,021 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:38:34,022 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-19 07:38:34,024 INFO L158 Benchmark]: Toolchain (without parser) took 249.78ms. Allocated memory is still 151.0MB. Free memory was 119.2MB in the beginning and 109.0MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 07:38:34,025 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 125.8MB. Free memory was 98.5MB in the beginning and 98.5MB in the end (delta: 72.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:38:34,026 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.49ms. Allocated memory is still 151.0MB. Free memory was 118.9MB in the beginning and 109.0MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-19 07:38:34,027 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 125.8MB. Free memory was 98.5MB in the beginning and 98.5MB in the end (delta: 72.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 245.49ms. Allocated memory is still 151.0MB. Free memory was 118.9MB in the beginning and 109.0MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 104]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:38:36,601 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:38:36,744 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-19 07:38:36,755 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:38:36,756 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:38:36,804 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:38:36,805 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:38:36,805 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:38:36,806 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:38:36,812 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:38:36,813 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:38:36,813 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:38:36,814 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:38:36,816 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:38:36,816 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:38:36,817 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:38:36,817 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:38:36,817 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:38:36,818 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:38:36,818 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:38:36,819 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:38:36,825 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:38:36,826 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:38:36,826 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-19 07:38:36,827 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-19 07:38:36,827 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:38:36,828 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:38:36,828 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:38:36,829 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:38:36,830 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:38:36,831 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:38:36,831 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:38:36,832 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:38:36,832 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:38:36,832 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-19 07:38:36,833 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-19 07:38:36,833 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:38:36,833 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:38:36,834 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:38:36,835 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-19 07:38:36,835 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:38:36,835 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_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a [2023-11-19 07:38:37,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:38:37,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:38:37,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:38:37,305 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:38:37,305 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:38:37,307 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2023-11-19 07:38:40,681 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:38:40,977 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:38:40,978 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2023-11-19 07:38:40,987 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/data/5cdae48c8/458be39052d94cecbf9e999ccb4fec42/FLAG8926f63a1 [2023-11-19 07:38:41,004 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/data/5cdae48c8/458be39052d94cecbf9e999ccb4fec42 [2023-11-19 07:38:41,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:38:41,009 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:38:41,010 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:38:41,010 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:38:41,017 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:38:41,017 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:38:41" (1/1) ... [2023-11-19 07:38:41,019 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68352bee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:41, skipping insertion in model container [2023-11-19 07:38:41,019 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:38:41" (1/1) ... [2023-11-19 07:38:41,046 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:38:41,260 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:38:41,288 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-19 07:38:41,302 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:38:41,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:38:41,354 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:38:41,404 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:38:41,425 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:38:41,425 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:38:41,434 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:38:41,435 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:41 WrapperNode [2023-11-19 07:38:41,436 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:38:41,437 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:38:41,437 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:38:41,437 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:38:41,447 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:41" (1/1) ... [2023-11-19 07:38:41,479 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:41" (1/1) ... [2023-11-19 07:38:41,528 INFO L138 Inliner]: procedures = 27, calls = 46, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 196 [2023-11-19 07:38:41,529 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:38:41,530 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:38:41,530 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:38:41,530 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:38:41,541 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:41" (1/1) ... [2023-11-19 07:38:41,541 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:41" (1/1) ... [2023-11-19 07:38:41,565 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:41" (1/1) ... [2023-11-19 07:38:41,565 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:41" (1/1) ... [2023-11-19 07:38:41,576 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:41" (1/1) ... [2023-11-19 07:38:41,596 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:41" (1/1) ... [2023-11-19 07:38:41,598 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:41" (1/1) ... [2023-11-19 07:38:41,601 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:41" (1/1) ... [2023-11-19 07:38:41,605 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:38:41,606 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:38:41,618 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:38:41,619 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:38:41,620 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:41" (1/1) ... [2023-11-19 07:38:41,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:38:41,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:41,655 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:41,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:38:41,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:38:41,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-19 07:38:41,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:38:41,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-19 07:38:41,707 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:38:41,707 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:38:41,707 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:38:41,707 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:38:41,708 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:38:41,709 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:38:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:38:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:38:41,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:38:41,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:38:41,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:38:41,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:38:41,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-19 07:38:41,713 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:38:41,868 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:38:41,870 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:38:42,633 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:38:42,914 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:38:42,915 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 07:38:42,922 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:38:42 BoogieIcfgContainer [2023-11-19 07:38:42,922 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:38:42,927 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:38:42,928 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:38:42,932 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:38:42,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:38:41" (1/3) ... [2023-11-19 07:38:42,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f8e090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:38:42, skipping insertion in model container [2023-11-19 07:38:42,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:41" (2/3) ... [2023-11-19 07:38:42,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f8e090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:38:42, skipping insertion in model container [2023-11-19 07:38:42,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:38:42" (3/3) ... [2023-11-19 07:38:42,936 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2023-11-19 07:38:42,955 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:38:42,955 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-11-19 07:38:42,956 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:38:43,076 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:38:43,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 183 transitions, 387 flow [2023-11-19 07:38:43,292 INFO L124 PetriNetUnfolderBase]: 12/180 cut-off events. [2023-11-19 07:38:43,292 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:38:43,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 180 events. 12/180 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 206 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 126. Up to 2 conditions per place. [2023-11-19 07:38:43,307 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 183 transitions, 387 flow [2023-11-19 07:38:43,324 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 175 transitions, 368 flow [2023-11-19 07:38:43,330 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:38:43,343 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 175 transitions, 368 flow [2023-11-19 07:38:43,347 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 175 transitions, 368 flow [2023-11-19 07:38:43,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 175 transitions, 368 flow [2023-11-19 07:38:43,420 INFO L124 PetriNetUnfolderBase]: 12/175 cut-off events. [2023-11-19 07:38:43,420 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:38:43,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 175 events. 12/175 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 204 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 126. Up to 2 conditions per place. [2023-11-19 07:38:43,429 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-11-19 07:39:07,100 INFO L134 LiptonReduction]: Checked pairs total: 3021 [2023-11-19 07:39:07,100 INFO L136 LiptonReduction]: Total number of compositions: 177 [2023-11-19 07:39:07,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:39:07,122 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;@5f4f8508, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:39:07,123 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-11-19 07:39:07,127 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:39:07,127 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-19 07:39:07,127 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:39:07,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:07,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:39:07,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-19 07:39:07,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:07,140 INFO L85 PathProgramCache]: Analyzing trace with hash 28100, now seen corresponding path program 1 times [2023-11-19 07:39:07,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:07,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937495560] [2023-11-19 07:39:07,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:07,156 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 [2023-11-19 07:39:07,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:07,159 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:07,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:07,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:39:07,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:07,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-19 07:39:07,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:07,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:07,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:07,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:07,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:07,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:07,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:07,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:07,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:07,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:07,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:07,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:07,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:07,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:07,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,670 INFO L378 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 [2023-11-19 07:39:07,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:07,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:07,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:07,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:07,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:07,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:07,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:07,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:07,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:07,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:07,779 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:07,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:07,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937495560] [2023-11-19 07:39:07,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937495560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:07,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:07,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:39:07,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834835021] [2023-11-19 07:39:07,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:07,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:07,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:07,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:07,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:07,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 360 [2023-11-19 07:39:07,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:07,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:07,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 360 [2023-11-19 07:39:07,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:08,626 INFO L124 PetriNetUnfolderBase]: 1817/2564 cut-off events. [2023-11-19 07:39:08,626 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2023-11-19 07:39:08,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5226 conditions, 2564 events. 1817/2564 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10379 event pairs, 1428 based on Foata normal form. 0/1026 useless extension candidates. Maximal degree in co-relation 4490. Up to 2562 conditions per place. [2023-11-19 07:39:08,655 INFO L140 encePairwiseOnDemand]: 354/360 looper letters, 39 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2023-11-19 07:39:08,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 190 flow [2023-11-19 07:39:08,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:39:08,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2023-11-19 07:39:08,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2023-11-19 07:39:08,674 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2023-11-19 07:39:08,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2023-11-19 07:39:08,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:08,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2023-11-19 07:39:08,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:08,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:08,693 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:08,695 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 108 flow. Second operand 3 states and 498 transitions. [2023-11-19 07:39:08,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 190 flow [2023-11-19 07:39:08,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 178 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 07:39:08,704 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 100 flow [2023-11-19 07:39:08,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-11-19 07:39:08,710 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-11-19 07:39:08,710 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 100 flow [2023-11-19 07:39:08,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:08,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:08,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:39:08,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:08,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:08,915 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-19 07:39:08,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:08,926 INFO L85 PathProgramCache]: Analyzing trace with hash 28154, now seen corresponding path program 1 times [2023-11-19 07:39:08,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:08,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153132022] [2023-11-19 07:39:08,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:08,927 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 [2023-11-19 07:39:08,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:08,929 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:08,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:09,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:39:09,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:09,133 INFO L349 Elim1Store]: treesize reduction 103, result has 12.7 percent of original size [2023-11-19 07:39:09,134 INFO L378 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 [2023-11-19 07:39:09,225 INFO L349 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2023-11-19 07:39:09,226 INFO L378 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 [2023-11-19 07:39:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:09,316 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:09,316 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:09,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153132022] [2023-11-19 07:39:09,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153132022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:09,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:09,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:39:09,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714389753] [2023-11-19 07:39:09,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:09,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:09,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:09,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:09,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:09,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 360 [2023-11-19 07:39:09,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:09,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:09,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 360 [2023-11-19 07:39:09,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:10,126 INFO L124 PetriNetUnfolderBase]: 1442/2063 cut-off events. [2023-11-19 07:39:10,127 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-19 07:39:10,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4163 conditions, 2063 events. 1442/2063 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 8123 event pairs, 1128 based on Foata normal form. 0/877 useless extension candidates. Maximal degree in co-relation 4147. Up to 2063 conditions per place. [2023-11-19 07:39:10,143 INFO L140 encePairwiseOnDemand]: 357/360 looper letters, 40 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-19 07:39:10,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 176 flow [2023-11-19 07:39:10,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:10,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:39:10,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-11-19 07:39:10,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2023-11-19 07:39:10,150 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-11-19 07:39:10,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-11-19 07:39:10,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:10,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-11-19 07:39:10,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:10,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:10,159 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:10,159 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 100 flow. Second operand 3 states and 496 transitions. [2023-11-19 07:39:10,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 176 flow [2023-11-19 07:39:10,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 41 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:39:10,162 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 90 flow [2023-11-19 07:39:10,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2023-11-19 07:39:10,164 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -8 predicate places. [2023-11-19 07:39:10,164 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 90 flow [2023-11-19 07:39:10,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:10,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:10,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:39:10,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:10,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:10,372 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-19 07:39:10,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:10,372 INFO L85 PathProgramCache]: Analyzing trace with hash 28101, now seen corresponding path program 1 times [2023-11-19 07:39:10,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:10,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796775639] [2023-11-19 07:39:10,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:10,373 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 [2023-11-19 07:39:10,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:10,375 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:10,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:10,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:39:10,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:10,494 INFO L378 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 [2023-11-19 07:39:10,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:10,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:10,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:10,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:10,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:10,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:10,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,644 INFO L378 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 [2023-11-19 07:39:10,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:10,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:10,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:10,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:10,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:10,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:10,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:10,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:10,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:10,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:10,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:10,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:10,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:10,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:10,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:10,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:10,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:10,943 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:10,944 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:10,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796775639] [2023-11-19 07:39:10,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796775639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:10,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:10,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:39:10,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907881031] [2023-11-19 07:39:10,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:10,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:10,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:10,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:10,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:11,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 360 [2023-11-19 07:39:11,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:11,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:11,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 360 [2023-11-19 07:39:11,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:11,669 INFO L124 PetriNetUnfolderBase]: 1444/2066 cut-off events. [2023-11-19 07:39:11,670 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-19 07:39:11,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4167 conditions, 2066 events. 1444/2066 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 8132 event pairs, 1128 based on Foata normal form. 0/877 useless extension candidates. Maximal degree in co-relation 4161. Up to 2066 conditions per place. [2023-11-19 07:39:11,686 INFO L140 encePairwiseOnDemand]: 355/360 looper letters, 40 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2023-11-19 07:39:11,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 44 transitions, 184 flow [2023-11-19 07:39:11,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:11,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:39:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-11-19 07:39:11,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-11-19 07:39:11,690 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-11-19 07:39:11,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-11-19 07:39:11,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:11,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-11-19 07:39:11,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:11,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:11,697 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:11,697 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 90 flow. Second operand 3 states and 495 transitions. [2023-11-19 07:39:11,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 44 transitions, 184 flow [2023-11-19 07:39:11,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:39:11,701 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 115 flow [2023-11-19 07:39:11,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2023-11-19 07:39:11,703 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-11-19 07:39:11,703 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 115 flow [2023-11-19 07:39:11,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:11,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:11,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:39:11,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:11,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:11,907 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-19 07:39:11,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:11,907 INFO L85 PathProgramCache]: Analyzing trace with hash 873337, now seen corresponding path program 1 times [2023-11-19 07:39:11,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:11,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802968180] [2023-11-19 07:39:11,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:11,908 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 [2023-11-19 07:39:11,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:11,909 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:11,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:12,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:39:12,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:12,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:12,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:12,100 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-19 07:39:12,100 INFO L378 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 9 [2023-11-19 07:39:12,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:12,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-19 07:39:12,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:12,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:12,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:12,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:12,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:12,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:12,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:12,428 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:12,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802968180] [2023-11-19 07:39:12,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802968180] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:12,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:39:12,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-11-19 07:39:12,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242193000] [2023-11-19 07:39:12,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:12,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:39:12,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:12,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:39:12,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:39:13,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 360 [2023-11-19 07:39:13,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:13,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:13,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 360 [2023-11-19 07:39:13,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:13,571 INFO L124 PetriNetUnfolderBase]: 1068/1564 cut-off events. [2023-11-19 07:39:13,571 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-19 07:39:13,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3172 conditions, 1564 events. 1068/1564 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5873 event pairs, 828 based on Foata normal form. 0/727 useless extension candidates. Maximal degree in co-relation 3164. Up to 1564 conditions per place. [2023-11-19 07:39:13,585 INFO L140 encePairwiseOnDemand]: 357/360 looper letters, 40 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-19 07:39:13,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 186 flow [2023-11-19 07:39:13,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:13,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:39:13,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-11-19 07:39:13,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42962962962962964 [2023-11-19 07:39:13,589 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-11-19 07:39:13,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-11-19 07:39:13,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:13,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-11-19 07:39:13,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-19 07:39:13,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:13,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:13,598 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 115 flow. Second operand 3 states and 464 transitions. [2023-11-19 07:39:13,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 186 flow [2023-11-19 07:39:13,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 181 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:39:13,601 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 101 flow [2023-11-19 07:39:13,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-11-19 07:39:13,604 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -7 predicate places. [2023-11-19 07:39:13,607 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 101 flow [2023-11-19 07:39:13,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:13,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:13,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:39:13,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:13,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:13,811 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-19 07:39:13,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:13,812 INFO L85 PathProgramCache]: Analyzing trace with hash 873285, now seen corresponding path program 1 times [2023-11-19 07:39:13,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:13,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509493081] [2023-11-19 07:39:13,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:13,813 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 [2023-11-19 07:39:13,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:13,814 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:13,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:13,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:39:13,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:13,924 INFO L378 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 [2023-11-19 07:39:13,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:13,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:13,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:13,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:13,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:13,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:13,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:13,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:14,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:14,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:14,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:14,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:14,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:14,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:14,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:14,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:14,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:14,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:14,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:14,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:14,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:14,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:14,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:14,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:14,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:14,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:14,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:14,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:14,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:14,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:14,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:14,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:14,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:14,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:14,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:14,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:14,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:14,292 INFO L378 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 [2023-11-19 07:39:14,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:14,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:14,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:14,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:14,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:14,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:14,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:14,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:14,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:14,668 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:14,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509493081] [2023-11-19 07:39:14,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509493081] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:14,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:39:14,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-19 07:39:14,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386036748] [2023-11-19 07:39:14,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:14,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:39:14,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:14,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:39:14,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:39:15,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 360 [2023-11-19 07:39:15,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 101 flow. Second operand has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:15,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:15,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 360 [2023-11-19 07:39:15,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:16,943 INFO L124 PetriNetUnfolderBase]: 1071/1570 cut-off events. [2023-11-19 07:39:16,944 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-19 07:39:16,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3188 conditions, 1570 events. 1071/1570 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5922 event pairs, 828 based on Foata normal form. 0/731 useless extension candidates. Maximal degree in co-relation 3179. Up to 1567 conditions per place. [2023-11-19 07:39:16,956 INFO L140 encePairwiseOnDemand]: 356/360 looper letters, 38 selfloop transitions, 9 changer transitions 0/47 dead transitions. [2023-11-19 07:39:16,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 219 flow [2023-11-19 07:39:16,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:39:16,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:39:16,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 920 transitions. [2023-11-19 07:39:16,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2023-11-19 07:39:16,961 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 920 transitions. [2023-11-19 07:39:16,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 920 transitions. [2023-11-19 07:39:16,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:16,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 920 transitions. [2023-11-19 07:39:16,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 153.33333333333334) internal successors, (920), 6 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:16,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 360.0) internal successors, (2520), 7 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:16,973 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 360.0) internal successors, (2520), 7 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:16,973 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 101 flow. Second operand 6 states and 920 transitions. [2023-11-19 07:39:16,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 219 flow [2023-11-19 07:39:16,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:39:16,977 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 161 flow [2023-11-19 07:39:16,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=161, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-11-19 07:39:16,981 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-11-19 07:39:16,981 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 161 flow [2023-11-19 07:39:16,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:16,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:16,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:39:16,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:17,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:17,185 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-19 07:39:17,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:17,186 INFO L85 PathProgramCache]: Analyzing trace with hash 27075596, now seen corresponding path program 1 times [2023-11-19 07:39:17,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:17,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738815683] [2023-11-19 07:39:17,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:17,186 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 [2023-11-19 07:39:17,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:17,188 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:17,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:17,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:39:17,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:17,317 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:17,318 INFO L378 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 [2023-11-19 07:39:17,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:17,360 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-19 07:39:17,360 INFO L378 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 [2023-11-19 07:39:17,383 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:17,384 INFO L378 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 [2023-11-19 07:39:17,418 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-19 07:39:17,418 INFO L378 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 [2023-11-19 07:39:17,451 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-19 07:39:17,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:17,474 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:17,474 INFO L378 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 [2023-11-19 07:39:17,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:17,534 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-19 07:39:17,534 INFO L378 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 [2023-11-19 07:39:17,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:17,570 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:17,570 INFO L378 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 [2023-11-19 07:39:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:17,788 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:17,789 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:17,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738815683] [2023-11-19 07:39:17,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738815683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:17,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:17,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:39:17,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736542397] [2023-11-19 07:39:17,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:17,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:17,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:17,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:17,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:18,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 360 [2023-11-19 07:39:18,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:18,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:18,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 360 [2023-11-19 07:39:18,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:18,536 INFO L124 PetriNetUnfolderBase]: 1016/1485 cut-off events. [2023-11-19 07:39:18,537 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-19 07:39:18,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3041 conditions, 1485 events. 1016/1485 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5519 event pairs, 784 based on Foata normal form. 0/712 useless extension candidates. Maximal degree in co-relation 3028. Up to 1485 conditions per place. [2023-11-19 07:39:18,575 INFO L140 encePairwiseOnDemand]: 357/360 looper letters, 44 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-19 07:39:18,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 247 flow [2023-11-19 07:39:18,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:18,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:39:18,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2023-11-19 07:39:18,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2023-11-19 07:39:18,580 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2023-11-19 07:39:18,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2023-11-19 07:39:18,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:18,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2023-11-19 07:39:18,583 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) [2023-11-19 07:39:18,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:18,587 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:18,587 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 161 flow. Second operand 3 states and 483 transitions. [2023-11-19 07:39:18,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 247 flow [2023-11-19 07:39:18,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 45 transitions, 226 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-19 07:39:18,590 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 138 flow [2023-11-19 07:39:18,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-11-19 07:39:18,592 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2023-11-19 07:39:18,592 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 138 flow [2023-11-19 07:39:18,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:18,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:18,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:39:18,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:18,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:18,796 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-19 07:39:18,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:18,797 INFO L85 PathProgramCache]: Analyzing trace with hash 27075597, now seen corresponding path program 1 times [2023-11-19 07:39:18,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:18,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299212736] [2023-11-19 07:39:18,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:18,798 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 [2023-11-19 07:39:18,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:18,799 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:18,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:18,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:39:18,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:18,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:18,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:18,964 INFO L378 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 [2023-11-19 07:39:18,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:18,982 INFO L378 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 [2023-11-19 07:39:19,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:19,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-19 07:39:19,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:19,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:19,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:19,058 INFO L378 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 [2023-11-19 07:39:19,073 INFO L378 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 [2023-11-19 07:39:19,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:19,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-19 07:39:19,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:19,118 INFO L378 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 [2023-11-19 07:39:19,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:19,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-19 07:39:19,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:19,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:19,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:19,198 INFO L378 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 [2023-11-19 07:39:19,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:19,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:19,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-19 07:39:19,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:19,294 INFO L378 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 [2023-11-19 07:39:19,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:19,325 INFO L378 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 [2023-11-19 07:39:19,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:19,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:19,353 INFO L378 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 [2023-11-19 07:39:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:19,434 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:19,434 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:19,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299212736] [2023-11-19 07:39:19,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299212736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:19,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:19,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:39:19,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082663633] [2023-11-19 07:39:19,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:19,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:19,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:19,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:19,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:19,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 360 [2023-11-19 07:39:19,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:19,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:19,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 360 [2023-11-19 07:39:19,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:20,127 INFO L124 PetriNetUnfolderBase]: 961/1400 cut-off events. [2023-11-19 07:39:20,127 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-19 07:39:20,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2863 conditions, 1400 events. 961/1400 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5165 event pairs, 740 based on Foata normal form. 0/691 useless extension candidates. Maximal degree in co-relation 2849. Up to 1400 conditions per place. [2023-11-19 07:39:20,141 INFO L140 encePairwiseOnDemand]: 357/360 looper letters, 42 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-11-19 07:39:20,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 43 transitions, 220 flow [2023-11-19 07:39:20,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:20,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:39:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-11-19 07:39:20,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564814814814815 [2023-11-19 07:39:20,146 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-11-19 07:39:20,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-11-19 07:39:20,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:20,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-11-19 07:39:20,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:20,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:20,153 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:20,153 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 138 flow. Second operand 3 states and 493 transitions. [2023-11-19 07:39:20,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 43 transitions, 220 flow [2023-11-19 07:39:20,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 43 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:39:20,156 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 135 flow [2023-11-19 07:39:20,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-11-19 07:39:20,157 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2023-11-19 07:39:20,158 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 135 flow [2023-11-19 07:39:20,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:20,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:20,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:39:20,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:20,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:20,362 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-19 07:39:20,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:20,362 INFO L85 PathProgramCache]: Analyzing trace with hash 839342399, now seen corresponding path program 1 times [2023-11-19 07:39:20,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:20,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726947206] [2023-11-19 07:39:20,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:20,363 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 [2023-11-19 07:39:20,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:20,365 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:20,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:20,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:39:20,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:20,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:20,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:20,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:20,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:20,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,556 INFO L378 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 [2023-11-19 07:39:20,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:20,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:20,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:20,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:20,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:20,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:20,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:20,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:20,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:20,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:20,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:20,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:20,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:20,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:20,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:20,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:20,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:20,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:20,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:20,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:20,813 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:20,813 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:20,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726947206] [2023-11-19 07:39:20,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726947206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:20,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:20,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:39:20,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580077530] [2023-11-19 07:39:20,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:20,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:39:20,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:20,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:39:20,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:39:21,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 360 [2023-11-19 07:39:21,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:21,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:21,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 360 [2023-11-19 07:39:21,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:21,386 INFO L124 PetriNetUnfolderBase]: 542/799 cut-off events. [2023-11-19 07:39:21,386 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:39:21,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1652 conditions, 799 events. 542/799 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2517 event pairs, 387 based on Foata normal form. 0/458 useless extension candidates. Maximal degree in co-relation 1637. Up to 792 conditions per place. [2023-11-19 07:39:21,394 INFO L140 encePairwiseOnDemand]: 355/360 looper letters, 34 selfloop transitions, 6 changer transitions 0/40 dead transitions. [2023-11-19 07:39:21,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 40 transitions, 209 flow [2023-11-19 07:39:21,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:39:21,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:39:21,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 631 transitions. [2023-11-19 07:39:21,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43819444444444444 [2023-11-19 07:39:21,398 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 631 transitions. [2023-11-19 07:39:21,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 631 transitions. [2023-11-19 07:39:21,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:21,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 631 transitions. [2023-11-19 07:39:21,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:21,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 360.0) internal successors, (1800), 5 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:21,406 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 360.0) internal successors, (1800), 5 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:21,406 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 135 flow. Second operand 4 states and 631 transitions. [2023-11-19 07:39:21,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 40 transitions, 209 flow [2023-11-19 07:39:21,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 40 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:39:21,409 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 140 flow [2023-11-19 07:39:21,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-11-19 07:39:21,410 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2023-11-19 07:39:21,410 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 140 flow [2023-11-19 07:39:21,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:21,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:21,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:39:21,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:21,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:21,614 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-19 07:39:21,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:21,614 INFO L85 PathProgramCache]: Analyzing trace with hash 839342400, now seen corresponding path program 1 times [2023-11-19 07:39:21,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:21,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415089358] [2023-11-19 07:39:21,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:21,615 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 [2023-11-19 07:39:21,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:21,616 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:21,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:21,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:39:21,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:21,719 INFO L378 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 [2023-11-19 07:39:21,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:21,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:21,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:21,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:21,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:21,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:21,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:21,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:21,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:21,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:21,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:21,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:21,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:21,861 INFO L378 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 [2023-11-19 07:39:21,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:21,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:21,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:21,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:21,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:21,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:21,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:21,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:21,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:21,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:21,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:21,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:21,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:21,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:21,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:21,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:22,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:22,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:22,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:22,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:22,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:22,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:22,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:22,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:22,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:22,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:22,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:22,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:22,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:22,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:22,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:22,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:22,196 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:22,196 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:22,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415089358] [2023-11-19 07:39:22,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415089358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:22,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:22,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:39:22,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094000131] [2023-11-19 07:39:22,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:22,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:39:22,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:22,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:39:22,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:39:22,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 360 [2023-11-19 07:39:22,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:22,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:22,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 360 [2023-11-19 07:39:22,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:23,067 INFO L124 PetriNetUnfolderBase]: 706/1013 cut-off events. [2023-11-19 07:39:23,067 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-11-19 07:39:23,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2091 conditions, 1013 events. 706/1013 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3391 event pairs, 387 based on Foata normal form. 0/575 useless extension candidates. Maximal degree in co-relation 2075. Up to 842 conditions per place. [2023-11-19 07:39:23,075 INFO L140 encePairwiseOnDemand]: 354/360 looper letters, 48 selfloop transitions, 9 changer transitions 0/57 dead transitions. [2023-11-19 07:39:23,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 57 transitions, 290 flow [2023-11-19 07:39:23,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:39:23,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:39:23,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 775 transitions. [2023-11-19 07:39:23,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2023-11-19 07:39:23,080 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 775 transitions. [2023-11-19 07:39:23,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 775 transitions. [2023-11-19 07:39:23,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:23,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 775 transitions. [2023-11-19 07:39:23,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 155.0) internal successors, (775), 5 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:23,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 360.0) internal successors, (2160), 6 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:23,088 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 360.0) internal successors, (2160), 6 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:23,088 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 140 flow. Second operand 5 states and 775 transitions. [2023-11-19 07:39:23,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 57 transitions, 290 flow [2023-11-19 07:39:23,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 283 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:39:23,091 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 164 flow [2023-11-19 07:39:23,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2023-11-19 07:39:23,092 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-11-19 07:39:23,092 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 164 flow [2023-11-19 07:39:23,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:23,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:23,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:39:23,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:23,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:23,296 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-19 07:39:23,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:23,297 INFO L85 PathProgramCache]: Analyzing trace with hash 249864485, now seen corresponding path program 1 times [2023-11-19 07:39:23,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:23,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779526607] [2023-11-19 07:39:23,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:23,297 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 [2023-11-19 07:39:23,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:23,299 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:23,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:23,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:39:23,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:23,417 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:23,417 INFO L378 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 [2023-11-19 07:39:23,437 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:23,438 INFO L378 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 [2023-11-19 07:39:23,466 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:23,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:23,499 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:23,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:23,534 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:23,534 INFO L378 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 [2023-11-19 07:39:23,564 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:23,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:23,593 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:23,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:23,617 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:23,617 INFO L378 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 [2023-11-19 07:39:23,641 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:23,641 INFO L378 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 [2023-11-19 07:39:23,662 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:23,663 INFO L378 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 [2023-11-19 07:39:23,691 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:23,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:23,712 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:39:23,712 INFO L378 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 [2023-11-19 07:39:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:23,827 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:23,827 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:23,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779526607] [2023-11-19 07:39:23,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779526607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:23,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:23,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:39:23,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180055768] [2023-11-19 07:39:23,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:23,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:23,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:23,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:23,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:23,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 360 [2023-11-19 07:39:23,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:23,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:23,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 360 [2023-11-19 07:39:23,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:24,314 INFO L124 PetriNetUnfolderBase]: 658/941 cut-off events. [2023-11-19 07:39:24,314 INFO L125 PetriNetUnfolderBase]: For 248/248 co-relation queries the response was YES. [2023-11-19 07:39:24,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2321 conditions, 941 events. 658/941 cut-off events. For 248/248 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2961 event pairs, 447 based on Foata normal form. 0/551 useless extension candidates. Maximal degree in co-relation 2304. Up to 941 conditions per place. [2023-11-19 07:39:24,324 INFO L140 encePairwiseOnDemand]: 357/360 looper letters, 39 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-11-19 07:39:24,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 40 transitions, 240 flow [2023-11-19 07:39:24,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:24,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:39:24,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-11-19 07:39:24,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44074074074074077 [2023-11-19 07:39:24,327 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-11-19 07:39:24,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-11-19 07:39:24,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:24,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-11-19 07:39:24,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:24,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:24,333 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:24,334 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 164 flow. Second operand 3 states and 476 transitions. [2023-11-19 07:39:24,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 40 transitions, 240 flow [2023-11-19 07:39:24,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 40 transitions, 223 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-19 07:39:24,336 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 145 flow [2023-11-19 07:39:24,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=46, 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=145, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-11-19 07:39:24,338 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2023-11-19 07:39:24,338 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 145 flow [2023-11-19 07:39:24,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:24,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:39:24,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:39:24,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:24,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:39:24,542 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-19 07:39:24,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:24,542 INFO L85 PathProgramCache]: Analyzing trace with hash 249864487, now seen corresponding path program 1 times [2023-11-19 07:39:24,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:39:24,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677837498] [2023-11-19 07:39:24,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:24,543 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 [2023-11-19 07:39:24,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:39:24,544 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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) [2023-11-19 07:39:24,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7d951a-9af4-41a0-8252-53c2f8594fac/bin/uautomizer-verify-uCwYo4JHxu/mathsat -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 [2023-11-19 07:39:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:24,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:39:24,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:24,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-19 07:39:24,687 INFO L378 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 10 treesize of output 8 [2023-11-19 07:39:24,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:24,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:24,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:24,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,741 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:39:24,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:24,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,778 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:39:24,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,792 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:39:24,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,800 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:39:24,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:24,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-19 07:39:24,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:39:24,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-19 07:39:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:24,880 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:24,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:39:24,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677837498] [2023-11-19 07:39:24,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677837498] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:24,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:24,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:39:24,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487945741] [2023-11-19 07:39:24,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:24,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:39:24,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:39:24,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:39:24,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:39:24,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 360 [2023-11-19 07:39:24,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:24,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:39:24,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 360 [2023-11-19 07:39:24,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:39:25,238 INFO L124 PetriNetUnfolderBase]: 610/869 cut-off events. [2023-11-19 07:39:25,239 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2023-11-19 07:39:25,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2014 conditions, 869 events. 610/869 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2690 event pairs, 413 based on Foata normal form. 0/568 useless extension candidates. Maximal degree in co-relation 1997. Up to 869 conditions per place. [2023-11-19 07:39:25,246 INFO L140 encePairwiseOnDemand]: 357/360 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-11-19 07:39:25,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 38 transitions, 217 flow [2023-11-19 07:39:25,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:39:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:39:25,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-11-19 07:39:25,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-11-19 07:39:25,249 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-11-19 07:39:25,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-11-19 07:39:25,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:39:25,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-11-19 07:39:25,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:25,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:25,255 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:25,255 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 145 flow. Second operand 3 states and 486 transitions. [2023-11-19 07:39:25,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 38 transitions, 217 flow [2023-11-19 07:39:25,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 38 transitions, 216 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:39:25,257 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 142 flow