./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:57:12,879 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:57:13,022 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 21:57:13,032 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:57:13,033 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:57:13,084 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:57:13,085 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:57:13,086 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:57:13,087 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:57:13,094 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:57:13,096 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:57:13,096 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:57:13,097 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:57:13,099 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:57:13,100 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:57:13,100 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:57:13,101 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:57:13,101 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:57:13,102 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:57:13,103 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:57:13,103 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:57:13,104 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:57:13,104 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:57:13,105 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:57:13,105 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:57:13,106 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:57:13,107 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:57:13,107 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:57:13,108 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:57:13,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:57:13,110 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:57:13,110 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:57:13,111 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:57:13,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:57:13,111 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:57:13,112 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:57:13,112 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:57:13,112 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:57:13,113 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_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f [2023-11-06 21:57:13,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:57:13,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:57:13,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:57:13,527 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:57:13,528 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:57:13,529 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2023-11-06 21:57:17,011 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:57:17,306 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:57:17,307 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2023-11-06 21:57:17,320 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/data/502df0c57/b278199ac39a4c9692ee4ed0f8ac3e70/FLAG780eba827 [2023-11-06 21:57:17,342 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/data/502df0c57/b278199ac39a4c9692ee4ed0f8ac3e70 [2023-11-06 21:57:17,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:57:17,353 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:57:17,357 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:57:17,358 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:57:17,364 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:57:17,365 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:17" (1/1) ... [2023-11-06 21:57:17,367 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d69c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:17, skipping insertion in model container [2023-11-06 21:57:17,367 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:17" (1/1) ... [2023-11-06 21:57:17,409 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:57:17,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:57:17,668 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-06 21:57:17,669 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@187d6862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:17, skipping insertion in model container [2023-11-06 21:57:17,670 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:57:17,670 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 21:57:17,673 INFO L158 Benchmark]: Toolchain (without parser) took 318.59ms. Allocated memory is still 151.0MB. Free memory was 105.6MB in the beginning and 95.8MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 21:57:17,673 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 151.0MB. Free memory is still 96.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:57:17,674 INFO L158 Benchmark]: CACSL2BoogieTranslator took 312.99ms. Allocated memory is still 151.0MB. Free memory was 105.3MB in the beginning and 95.8MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 21:57:17,676 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 151.0MB. Free memory is still 96.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 312.99ms. Allocated memory is still 151.0MB. Free memory was 105.3MB in the beginning and 95.8MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:57:20,495 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:57:20,580 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 21:57:20,602 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:57:20,603 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:57:20,639 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:57:20,640 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:57:20,641 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:57:20,642 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:57:20,643 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:57:20,644 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:57:20,644 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:57:20,645 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:57:20,646 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:57:20,647 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:57:20,647 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:57:20,648 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:57:20,649 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:57:20,649 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:57:20,650 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:57:20,651 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:57:20,651 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:57:20,652 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:57:20,652 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 21:57:20,653 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 21:57:20,654 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:57:20,654 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:57:20,655 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:57:20,656 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:57:20,656 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:57:20,657 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:57:20,657 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:57:20,658 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:57:20,659 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:57:20,659 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 21:57:20,660 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 21:57:20,660 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:57:20,661 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:57:20,662 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:57:20,662 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 21:57:20,663 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:57:20,664 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f [2023-11-06 21:57:21,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:57:21,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:57:21,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:57:21,198 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:57:21,199 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:57:21,201 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2023-11-06 21:57:24,954 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:57:25,267 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:57:25,268 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2023-11-06 21:57:25,278 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/data/31db58ef4/54a25bb881124e5bbef08872ac21ff5a/FLAG841e92001 [2023-11-06 21:57:25,297 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/data/31db58ef4/54a25bb881124e5bbef08872ac21ff5a [2023-11-06 21:57:25,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:57:25,303 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:57:25,305 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:57:25,305 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:57:25,318 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:57:25,319 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:25" (1/1) ... [2023-11-06 21:57:25,320 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35e1b200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:25, skipping insertion in model container [2023-11-06 21:57:25,321 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:25" (1/1) ... [2023-11-06 21:57:25,361 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:57:25,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:57:25,717 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 21:57:25,732 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:57:25,775 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:57:25,782 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:57:25,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:57:25,863 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:57:25,864 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:57:25,874 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:57:25,875 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:25 WrapperNode [2023-11-06 21:57:25,876 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:57:25,878 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:57:25,878 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:57:25,878 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:57:25,889 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:25" (1/1) ... [2023-11-06 21:57:25,921 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:25" (1/1) ... [2023-11-06 21:57:25,990 INFO L138 Inliner]: procedures = 27, calls = 47, calls flagged for inlining = 14, calls inlined = 20, statements flattened = 226 [2023-11-06 21:57:25,991 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:57:25,992 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:57:25,993 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:57:25,994 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:57:26,006 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:25" (1/1) ... [2023-11-06 21:57:26,006 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:25" (1/1) ... [2023-11-06 21:57:26,032 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:25" (1/1) ... [2023-11-06 21:57:26,032 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:25" (1/1) ... [2023-11-06 21:57:26,046 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:25" (1/1) ... [2023-11-06 21:57:26,075 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:25" (1/1) ... [2023-11-06 21:57:26,078 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:25" (1/1) ... [2023-11-06 21:57:26,081 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:25" (1/1) ... [2023-11-06 21:57:26,089 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:57:26,097 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:57:26,098 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:57:26,099 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:57:26,100 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:25" (1/1) ... [2023-11-06 21:57:26,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:57:26,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:26,144 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:57:26,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:57:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:57:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 21:57:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:57:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 21:57:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 21:57:26,206 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 21:57:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 21:57:26,206 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 21:57:26,207 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 21:57:26,207 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 21:57:26,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 21:57:26,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 21:57:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 21:57:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:57:26,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:57:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:57:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 21:57:26,211 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 21:57:26,382 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:57:26,385 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:57:27,316 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:57:27,692 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:57:27,692 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 21:57:27,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:57:27 BoogieIcfgContainer [2023-11-06 21:57:27,697 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:57:27,702 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:57:27,703 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:57:27,707 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:57:27,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:57:25" (1/3) ... [2023-11-06 21:57:27,709 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738bbfcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:57:27, skipping insertion in model container [2023-11-06 21:57:27,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:25" (2/3) ... [2023-11-06 21:57:27,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738bbfcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:57:27, skipping insertion in model container [2023-11-06 21:57:27,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:57:27" (3/3) ... [2023-11-06 21:57:27,713 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2023-11-06 21:57:27,737 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:57:27,738 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-11-06 21:57:27,738 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:57:27,934 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 21:57:28,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 260 transitions, 541 flow [2023-11-06 21:57:28,232 INFO L124 PetriNetUnfolderBase]: 18/257 cut-off events. [2023-11-06 21:57:28,232 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 21:57:28,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 257 events. 18/257 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 502 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 200. Up to 2 conditions per place. [2023-11-06 21:57:28,245 INFO L82 GeneralOperation]: Start removeDead. Operand has 252 places, 260 transitions, 541 flow [2023-11-06 21:57:28,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 252 transitions, 522 flow [2023-11-06 21:57:28,271 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:57:28,284 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 244 places, 252 transitions, 522 flow [2023-11-06 21:57:28,287 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 244 places, 252 transitions, 522 flow [2023-11-06 21:57:28,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 252 transitions, 522 flow [2023-11-06 21:57:28,355 INFO L124 PetriNetUnfolderBase]: 18/252 cut-off events. [2023-11-06 21:57:28,355 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 21:57:28,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 252 events. 18/252 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 508 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 200. Up to 2 conditions per place. [2023-11-06 21:57:28,369 INFO L119 LiptonReduction]: Number of co-enabled transitions 12810 [2023-11-06 21:58:25,149 WARN L293 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 118 DAG size of output: 110 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-06 21:58:25,508 INFO L134 LiptonReduction]: Checked pairs total: 13589 [2023-11-06 21:58:25,508 INFO L136 LiptonReduction]: Total number of compositions: 279 [2023-11-06 21:58:25,523 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:58:25,528 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;@63086c5b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:58:25,528 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-11-06 21:58:25,531 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:58:25,531 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 21:58:25,531 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:58:25,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:25,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 21:58:25,533 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 21:58:25,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:25,538 INFO L85 PathProgramCache]: Analyzing trace with hash 37802, now seen corresponding path program 1 times [2023-11-06 21:58:25,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:58:25,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082475307] [2023-11-06 21:58:25,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:25,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:25,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:58:25,554 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:58:25,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-06 21:58:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:25,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:58:25,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:25,830 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 21:58:25,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:25,851 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:25,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:25,869 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:25,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:25,876 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:58:25,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:25,890 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:25,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:25,915 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 21:58:25,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:25,953 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 21:58:25,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:25,963 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:26,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:26,002 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 21:58:26,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:26,023 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 21:58:26,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:26,052 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:26,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:26,067 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 21:58:26,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:26,076 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:58:26,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:26,084 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:26,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:26,094 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:26,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:26,099 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:58:26,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:26,116 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 21:58:26,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:26,126 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:26,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:26,138 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:26,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:26,158 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 21:58:26,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:26,174 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:26,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:26,181 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:58:26,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:26,192 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:26,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:26,197 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:58:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:26,204 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:26,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:58:26,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082475307] [2023-11-06 21:58:26,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082475307] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:26,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:26,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:58:26,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299527580] [2023-11-06 21:58:26,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:26,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:26,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:58:26,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:26,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:26,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 539 [2023-11-06 21:58:26,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:26,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:26,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 539 [2023-11-06 21:58:26,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:27,754 INFO L124 PetriNetUnfolderBase]: 3710/4745 cut-off events. [2023-11-06 21:58:27,755 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-06 21:58:27,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9581 conditions, 4745 events. 3710/4745 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 20507 event pairs, 1901 based on Foata normal form. 0/1547 useless extension candidates. Maximal degree in co-relation 8432. Up to 4707 conditions per place. [2023-11-06 21:58:27,807 INFO L140 encePairwiseOnDemand]: 525/539 looper letters, 38 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2023-11-06 21:58:27,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 45 transitions, 192 flow [2023-11-06 21:58:27,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:58:27,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 736 transitions. [2023-11-06 21:58:27,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551638837353123 [2023-11-06 21:58:27,839 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 736 transitions. [2023-11-06 21:58:27,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 736 transitions. [2023-11-06 21:58:27,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:27,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 736 transitions. [2023-11-06 21:58:27,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:27,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:27,864 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:27,867 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 128 flow. Second operand 3 states and 736 transitions. [2023-11-06 21:58:27,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 45 transitions, 192 flow [2023-11-06 21:58:27,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 180 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 21:58:27,878 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 104 flow [2023-11-06 21:58:27,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-11-06 21:58:27,884 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -14 predicate places. [2023-11-06 21:58:27,885 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 104 flow [2023-11-06 21:58:27,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:27,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:27,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 21:58:27,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:28,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:28,087 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 21:58:28,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:28,088 INFO L85 PathProgramCache]: Analyzing trace with hash 37803, now seen corresponding path program 1 times [2023-11-06 21:58:28,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:58:28,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021740306] [2023-11-06 21:58:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:28,089 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:28,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:58:28,097 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:58:28,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-06 21:58:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:28,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:58:28,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:28,205 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 21:58:28,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,229 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:28,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,239 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:58:28,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,265 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:28,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,285 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:28,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,312 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:58:28,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,328 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:58:28,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,349 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:28,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,360 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:58:28,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,373 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:28,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,405 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:58:28,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,422 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:28,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,438 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:58:28,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,453 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:28,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,484 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:58:28,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,502 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:28,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,520 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:58:28,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,534 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:28,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,616 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:58:28,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,653 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 21:58:28,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,680 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:58:28,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,695 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:28,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,725 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:58:28,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:28,743 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:28,779 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:28,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:58:28,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021740306] [2023-11-06 21:58:28,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021740306] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:28,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:28,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:58:28,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888963011] [2023-11-06 21:58:28,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:28,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:28,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:58:28,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:28,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:29,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 539 [2023-11-06 21:58:29,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:29,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:29,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 539 [2023-11-06 21:58:29,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:30,209 INFO L124 PetriNetUnfolderBase]: 3713/4749 cut-off events. [2023-11-06 21:58:30,210 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 21:58:30,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9515 conditions, 4749 events. 3713/4749 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 20544 event pairs, 1901 based on Foata normal form. 0/1550 useless extension candidates. Maximal degree in co-relation 9485. Up to 4713 conditions per place. [2023-11-06 21:58:30,253 INFO L140 encePairwiseOnDemand]: 533/539 looper letters, 41 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2023-11-06 21:58:30,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 49 transitions, 210 flow [2023-11-06 21:58:30,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:58:30,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 728 transitions. [2023-11-06 21:58:30,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2023-11-06 21:58:30,258 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 728 transitions. [2023-11-06 21:58:30,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 728 transitions. [2023-11-06 21:58:30,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:30,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 728 transitions. [2023-11-06 21:58:30,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:30,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:30,270 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:30,270 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 104 flow. Second operand 3 states and 728 transitions. [2023-11-06 21:58:30,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 49 transitions, 210 flow [2023-11-06 21:58:30,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:58:30,273 INFO L231 Difference]: Finished difference. Result has 48 places, 49 transitions, 129 flow [2023-11-06 21:58:30,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=48, PETRI_TRANSITIONS=49} [2023-11-06 21:58:30,275 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -13 predicate places. [2023-11-06 21:58:30,275 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 49 transitions, 129 flow [2023-11-06 21:58:30,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:30,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:30,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 21:58:30,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:30,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:30,489 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 21:58:30,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:30,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1175088, now seen corresponding path program 1 times [2023-11-06 21:58:30,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:58:30,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264212170] [2023-11-06 21:58:30,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:30,501 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:30,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:58:30,505 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:58:30,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-06 21:58:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:30,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:58:30,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:30,664 INFO L322 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2023-11-06 21:58:30,665 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 40 [2023-11-06 21:58:30,749 INFO L322 Elim1Store]: treesize reduction 103, result has 12.7 percent of original size [2023-11-06 21:58:30,749 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 40 [2023-11-06 21:58:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:58:30,885 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:30,886 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:58:30,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264212170] [2023-11-06 21:58:30,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264212170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:30,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:30,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:58:30,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024810602] [2023-11-06 21:58:30,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:30,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:30,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:58:30,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:30,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:31,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 539 [2023-11-06 21:58:31,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 49 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:31,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:31,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 539 [2023-11-06 21:58:31,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:32,180 INFO L124 PetriNetUnfolderBase]: 2914/3769 cut-off events. [2023-11-06 21:58:32,180 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 21:58:32,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7560 conditions, 3769 events. 2914/3769 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 16148 event pairs, 1487 based on Foata normal form. 0/1296 useless extension candidates. Maximal degree in co-relation 7529. Up to 3733 conditions per place. [2023-11-06 21:58:32,211 INFO L140 encePairwiseOnDemand]: 536/539 looper letters, 42 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-06 21:58:32,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 204 flow [2023-11-06 21:58:32,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:32,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:58:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 726 transitions. [2023-11-06 21:58:32,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2023-11-06 21:58:32,216 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 726 transitions. [2023-11-06 21:58:32,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 726 transitions. [2023-11-06 21:58:32,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:32,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 726 transitions. [2023-11-06 21:58:32,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:32,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:32,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:32,225 INFO L175 Difference]: Start difference. First operand has 48 places, 49 transitions, 129 flow. Second operand 3 states and 726 transitions. [2023-11-06 21:58:32,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 204 flow [2023-11-06 21:58:32,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 198 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 21:58:32,227 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 114 flow [2023-11-06 21:58:32,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2023-11-06 21:58:32,228 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -14 predicate places. [2023-11-06 21:58:32,228 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 114 flow [2023-11-06 21:58:32,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:32,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:32,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 21:58:32,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:32,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:32,441 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 21:58:32,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:32,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1175087, now seen corresponding path program 1 times [2023-11-06 21:58:32,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:58:32,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135058623] [2023-11-06 21:58:32,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:32,443 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:32,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:58:32,444 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:58:32,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-06 21:58:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:32,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 21:58:32,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:32,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:32,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:32,659 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 21:58:32,659 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 9 [2023-11-06 21:58:32,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:32,686 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-06 21:58:32,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:32,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:32,722 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 21:58:32,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:32,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:32,754 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 21:58:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:32,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:32,962 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:58:32,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135058623] [2023-11-06 21:58:32,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135058623] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:32,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:58:32,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-11-06 21:58:32,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234158954] [2023-11-06 21:58:32,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:32,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:58:32,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:58:32,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:58:32,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:33,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 539 [2023-11-06 21:58:33,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 218.75) internal successors, (875), 4 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:33,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:33,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 539 [2023-11-06 21:58:33,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:34,719 INFO L124 PetriNetUnfolderBase]: 2115/2789 cut-off events. [2023-11-06 21:58:34,719 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 21:58:34,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5595 conditions, 2789 events. 2115/2789 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 11855 event pairs, 1073 based on Foata normal form. 0/1045 useless extension candidates. Maximal degree in co-relation 5587. Up to 2753 conditions per place. [2023-11-06 21:58:34,749 INFO L140 encePairwiseOnDemand]: 536/539 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-11-06 21:58:34,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 184 flow [2023-11-06 21:58:34,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:34,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:58:34,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 694 transitions. [2023-11-06 21:58:34,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4291898577612863 [2023-11-06 21:58:34,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 694 transitions. [2023-11-06 21:58:34,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 694 transitions. [2023-11-06 21:58:34,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:34,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 694 transitions. [2023-11-06 21:58:34,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:34,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:34,763 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:34,763 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 114 flow. Second operand 3 states and 694 transitions. [2023-11-06 21:58:34,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 184 flow [2023-11-06 21:58:34,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:58:34,766 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 105 flow [2023-11-06 21:58:34,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=44, 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=105, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-11-06 21:58:34,768 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -15 predicate places. [2023-11-06 21:58:34,768 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 105 flow [2023-11-06 21:58:34,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 218.75) internal successors, (875), 4 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:34,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:34,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 21:58:34,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:34,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:34,986 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 21:58:34,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:34,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1174976, now seen corresponding path program 1 times [2023-11-06 21:58:34,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:58:34,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235658297] [2023-11-06 21:58:34,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:34,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:34,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:58:34,989 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:58:34,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-06 21:58:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:35,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:58:35,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:35,107 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-06 21:58:35,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,148 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 21:58:35,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,175 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:58:35,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,187 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:35,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,201 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:35,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,223 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:58:35,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,250 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:58:35,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,263 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:35,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,276 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:58:35,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,289 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:35,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,302 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:35,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,309 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:58:35,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,326 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:35,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,348 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:58:35,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,361 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:58:35,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,373 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:35,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,387 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:35,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,396 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:58:35,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,411 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:35,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,420 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:58:35,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,433 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:35,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,442 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:58:35,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,463 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:35,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:35,485 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:58:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:35,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:35,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:58:35,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235658297] [2023-11-06 21:58:35,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235658297] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:35,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:58:35,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 21:58:35,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093296856] [2023-11-06 21:58:35,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:35,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:58:35,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:58:35,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:58:35,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:37,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 539 [2023-11-06 21:58:37,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 105 flow. Second operand has 6 states, 6 states have (on average 223.0) internal successors, (1338), 6 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:37,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:37,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 539 [2023-11-06 21:58:37,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:38,477 INFO L124 PetriNetUnfolderBase]: 2118/2795 cut-off events. [2023-11-06 21:58:38,478 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 21:58:38,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5614 conditions, 2795 events. 2118/2795 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 11921 event pairs, 1073 based on Foata normal form. 0/1048 useless extension candidates. Maximal degree in co-relation 5605. Up to 2756 conditions per place. [2023-11-06 21:58:38,499 INFO L140 encePairwiseOnDemand]: 535/539 looper letters, 37 selfloop transitions, 9 changer transitions 0/49 dead transitions. [2023-11-06 21:58:38,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 221 flow [2023-11-06 21:58:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:58:38,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:58:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1381 transitions. [2023-11-06 21:58:38,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270253555967842 [2023-11-06 21:58:38,507 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1381 transitions. [2023-11-06 21:58:38,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1381 transitions. [2023-11-06 21:58:38,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:38,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1381 transitions. [2023-11-06 21:58:38,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 230.16666666666666) internal successors, (1381), 6 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:38,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 539.0) internal successors, (3773), 7 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:38,523 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 539.0) internal successors, (3773), 7 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:38,524 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 105 flow. Second operand 6 states and 1381 transitions. [2023-11-06 21:58:38,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 221 flow [2023-11-06 21:58:38,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:58:38,528 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 165 flow [2023-11-06 21:58:38,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=165, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2023-11-06 21:58:38,531 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -8 predicate places. [2023-11-06 21:58:38,531 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 165 flow [2023-11-06 21:58:38,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 223.0) internal successors, (1338), 6 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:38,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:38,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 21:58:38,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:38,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:38,744 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 21:58:38,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:38,745 INFO L85 PathProgramCache]: Analyzing trace with hash 36465293, now seen corresponding path program 1 times [2023-11-06 21:58:38,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:58:38,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194641543] [2023-11-06 21:58:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:38,746 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:38,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:58:38,747 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:58:38,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-06 21:58:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:38,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:58:38,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:38,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:38,872 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:58:38,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194641543] [2023-11-06 21:58:38,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194641543] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:38,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:38,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:58:38,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804908680] [2023-11-06 21:58:38,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:38,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:38,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:58:38,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:38,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:38,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 539 [2023-11-06 21:58:38,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:38,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:38,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 539 [2023-11-06 21:58:38,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:39,643 INFO L124 PetriNetUnfolderBase]: 2117/2794 cut-off events. [2023-11-06 21:58:39,643 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-06 21:58:39,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5633 conditions, 2794 events. 2117/2794 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 11941 event pairs, 1073 based on Foata normal form. 1/1051 useless extension candidates. Maximal degree in co-relation 5620. Up to 2758 conditions per place. [2023-11-06 21:58:39,663 INFO L140 encePairwiseOnDemand]: 536/539 looper letters, 43 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-11-06 21:58:39,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 48 transitions, 249 flow [2023-11-06 21:58:39,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:39,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:58:39,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 727 transitions. [2023-11-06 21:58:39,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44959802102659246 [2023-11-06 21:58:39,667 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 727 transitions. [2023-11-06 21:58:39,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 727 transitions. [2023-11-06 21:58:39,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:39,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 727 transitions. [2023-11-06 21:58:39,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.33333333333334) internal successors, (727), 3 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:39,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:39,676 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:39,676 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 165 flow. Second operand 3 states and 727 transitions. [2023-11-06 21:58:39,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 48 transitions, 249 flow [2023-11-06 21:58:39,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 48 transitions, 229 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-06 21:58:39,679 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 143 flow [2023-11-06 21:58:39,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-11-06 21:58:39,680 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -7 predicate places. [2023-11-06 21:58:39,680 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 143 flow [2023-11-06 21:58:39,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:39,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:39,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 21:58:39,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:39,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:39,893 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 21:58:39,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:39,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1129288546, now seen corresponding path program 1 times [2023-11-06 21:58:39,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:58:39,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093081466] [2023-11-06 21:58:39,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:39,894 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:39,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:58:39,895 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:58:39,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-06 21:58:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:40,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:58:40,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:40,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,064 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 21:58:40,065 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-11-06 21:58:40,074 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 21:58:40,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,106 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 21:58:40,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,114 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-06 21:58:40,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,187 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 21:58:40,188 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2023-11-06 21:58:40,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,208 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 21:58:40,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,252 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 21:58:40,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,271 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-06 21:58:40,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,332 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 21:58:40,332 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 21:58:40,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,348 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 21:58:40,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,372 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 21:58:40,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,433 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 21:58:40,433 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 21:58:40,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:40,467 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 21:58:40,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:41,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:41,289 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:58:41,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093081466] [2023-11-06 21:58:41,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093081466] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:41,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:58:41,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-06 21:58:41,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422092798] [2023-11-06 21:58:41,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:41,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:58:41,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:58:41,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:58:41,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:58:43,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 539 [2023-11-06 21:58:43,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 143 flow. Second operand has 8 states, 8 states have (on average 218.25) internal successors, (1746), 8 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:43,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:43,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 539 [2023-11-06 21:58:43,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:45,152 INFO L124 PetriNetUnfolderBase]: 2016/2657 cut-off events. [2023-11-06 21:58:45,152 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-06 21:58:45,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5352 conditions, 2657 events. 2016/2657 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 11158 event pairs, 1020 based on Foata normal form. 0/1021 useless extension candidates. Maximal degree in co-relation 5338. Up to 2619 conditions per place. [2023-11-06 21:58:45,168 INFO L140 encePairwiseOnDemand]: 534/539 looper letters, 39 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-11-06 21:58:45,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 46 transitions, 225 flow [2023-11-06 21:58:45,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:58:45,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:58:45,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1126 transitions. [2023-11-06 21:58:45,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178107606679035 [2023-11-06 21:58:45,174 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1126 transitions. [2023-11-06 21:58:45,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1126 transitions. [2023-11-06 21:58:45,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:45,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1126 transitions. [2023-11-06 21:58:45,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.2) internal successors, (1126), 5 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:45,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 539.0) internal successors, (3234), 6 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:45,185 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 539.0) internal successors, (3234), 6 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:45,186 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 143 flow. Second operand 5 states and 1126 transitions. [2023-11-06 21:58:45,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 46 transitions, 225 flow [2023-11-06 21:58:45,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 46 transitions, 221 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:58:45,188 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 143 flow [2023-11-06 21:58:45,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=143, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2023-11-06 21:58:45,189 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -7 predicate places. [2023-11-06 21:58:45,190 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 143 flow [2023-11-06 21:58:45,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 218.25) internal successors, (1746), 8 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:45,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:45,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 21:58:45,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:45,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:45,403 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 21:58:45,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:45,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1129288548, now seen corresponding path program 1 times [2023-11-06 21:58:45,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:58:45,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664634262] [2023-11-06 21:58:45,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:45,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:45,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:58:45,406 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:58:45,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-06 21:58:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:45,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 21:58:45,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:45,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:45,582 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 21:58:45,582 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-06 21:58:45,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:45,643 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 21:58:45,643 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-06 21:58:45,668 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 21:58:45,668 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2023-11-06 21:58:45,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:45,704 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 21:58:45,704 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-06 21:58:45,727 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 21:58:45,727 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2023-11-06 21:58:45,763 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 21:58:45,763 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2023-11-06 21:58:45,797 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 21:58:45,797 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-06 21:58:45,815 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 21:58:45,815 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-06 21:58:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:58:45,995 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:45,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:58:45,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664634262] [2023-11-06 21:58:45,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664634262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:45,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:45,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:58:45,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694494745] [2023-11-06 21:58:45,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:45,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:45,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:58:45,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:45,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:46,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 539 [2023-11-06 21:58:46,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:46,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:46,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 539 [2023-11-06 21:58:46,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:46,778 INFO L124 PetriNetUnfolderBase]: 1915/2520 cut-off events. [2023-11-06 21:58:46,778 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-06 21:58:46,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5080 conditions, 2520 events. 1915/2520 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 10480 event pairs, 967 based on Foata normal form. 0/991 useless extension candidates. Maximal degree in co-relation 5066. Up to 2484 conditions per place. [2023-11-06 21:58:46,795 INFO L140 encePairwiseOnDemand]: 536/539 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-11-06 21:58:46,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 44 transitions, 221 flow [2023-11-06 21:58:46,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:46,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:58:46,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 711 transitions. [2023-11-06 21:58:46,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397031539888683 [2023-11-06 21:58:46,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 711 transitions. [2023-11-06 21:58:46,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 711 transitions. [2023-11-06 21:58:46,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:46,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 711 transitions. [2023-11-06 21:58:46,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:46,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:46,833 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:46,834 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 143 flow. Second operand 3 states and 711 transitions. [2023-11-06 21:58:46,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 44 transitions, 221 flow [2023-11-06 21:58:46,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 44 transitions, 215 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 21:58:46,836 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 135 flow [2023-11-06 21:58:46,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-11-06 21:58:46,836 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -10 predicate places. [2023-11-06 21:58:46,837 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 135 flow [2023-11-06 21:58:46,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:46,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:46,837 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 21:58:46,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:47,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:47,047 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 21:58:47,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:47,048 INFO L85 PathProgramCache]: Analyzing trace with hash 647033067, now seen corresponding path program 2 times [2023-11-06 21:58:47,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:58:47,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801806709] [2023-11-06 21:58:47,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:58:47,049 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:47,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:58:47,050 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:58:47,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-06 21:58:47,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:58:47,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:58:47,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:58:47,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:47,194 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 21:58:47,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,207 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:47,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,220 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:47,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,228 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:58:47,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,240 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:47,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,261 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:58:47,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,277 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:47,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,284 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:58:47,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,292 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:58:47,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,302 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:47,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,319 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:47,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,339 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:58:47,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,348 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:58:47,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,358 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:47,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,366 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:58:47,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,376 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:47,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,397 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:58:47,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,407 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:47,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,441 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 21:58:47,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,461 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:58:47,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,473 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:47,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,492 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:58:47,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,514 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:58:47,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:47,524 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:58:47,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:47,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:48,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:58:48,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801806709] [2023-11-06 21:58:48,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801806709] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:48,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:58:48,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 21:58:48,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459630076] [2023-11-06 21:58:48,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:48,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:58:48,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:58:48,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:58:48,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:58:53,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 539 [2023-11-06 21:58:53,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 135 flow. Second operand has 12 states, 12 states have (on average 224.0) internal successors, (2688), 12 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:53,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:53,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 539 [2023-11-06 21:58:53,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:57,451 INFO L124 PetriNetUnfolderBase]: 1921/2532 cut-off events. [2023-11-06 21:58:57,451 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-06 21:58:57,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5127 conditions, 2532 events. 1921/2532 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 10665 event pairs, 967 based on Foata normal form. 6/1003 useless extension candidates. Maximal degree in co-relation 5113. Up to 2487 conditions per place. [2023-11-06 21:58:57,466 INFO L140 encePairwiseOnDemand]: 535/539 looper letters, 33 selfloop transitions, 20 changer transitions 0/56 dead transitions. [2023-11-06 21:58:57,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 313 flow [2023-11-06 21:58:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:58:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 21:58:57,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2735 transitions. [2023-11-06 21:58:57,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228509585652443 [2023-11-06 21:58:57,484 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2735 transitions. [2023-11-06 21:58:57,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2735 transitions. [2023-11-06 21:58:57,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:57,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2735 transitions. [2023-11-06 21:58:57,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 227.91666666666666) internal successors, (2735), 12 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:57,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 539.0) internal successors, (7007), 13 states have internal predecessors, (7007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:57,513 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 539.0) internal successors, (7007), 13 states have internal predecessors, (7007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:57,514 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 135 flow. Second operand 12 states and 2735 transitions. [2023-11-06 21:58:57,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 313 flow [2023-11-06 21:58:57,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 56 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:58:57,518 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 280 flow [2023-11-06 21:58:57,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=280, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2023-11-06 21:58:57,520 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 6 predicate places. [2023-11-06 21:58:57,520 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 280 flow [2023-11-06 21:58:57,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 224.0) internal successors, (2688), 12 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:57,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:57,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 21:58:57,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:57,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:57,734 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 21:58:57,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:57,735 INFO L85 PathProgramCache]: Analyzing trace with hash 648197382, now seen corresponding path program 1 times [2023-11-06 21:58:57,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:58:57,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026156970] [2023-11-06 21:58:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:57,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:57,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:58:57,737 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:58:57,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-06 21:58:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:57,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 21:58:57,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:57,867 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-06 21:58:57,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:57,882 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:57,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:57,893 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:57,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:57,903 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:58:57,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:57,913 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:57,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:57,918 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:58:57,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:57,938 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 21:58:57,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:57,953 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:57,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:57,973 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 21:58:57,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:57,982 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:58,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:58,011 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 21:58:58,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:58,027 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 21:58:58,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:58,037 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:58,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:58,051 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 21:58:58,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:58,059 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:58,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:58,064 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:58:58,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:58,070 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:58:58,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:58,078 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:58,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:58,089 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:58,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:58,104 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 21:58:58,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:58,112 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:58,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:58,117 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:58:58,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:58,123 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:58:58,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:58,131 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:58:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:58:58,152 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:58,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:58:58,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026156970] [2023-11-06 21:58:58,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026156970] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:58,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:58,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:58:58,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741024498] [2023-11-06 21:58:58,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:58,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:58:58,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:58:58,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:58:58,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:58:58,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 539 [2023-11-06 21:58:58,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 280 flow. Second operand has 4 states, 4 states have (on average 218.25) internal successors, (873), 4 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:58,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:58,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 539 [2023-11-06 21:58:58,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:58,865 INFO L124 PetriNetUnfolderBase]: 1070/1451 cut-off events. [2023-11-06 21:58:58,865 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-06 21:58:58,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3010 conditions, 1451 events. 1070/1451 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5792 event pairs, 540 based on Foata normal form. 0/695 useless extension candidates. Maximal degree in co-relation 2989. Up to 1413 conditions per place. [2023-11-06 21:58:58,876 INFO L140 encePairwiseOnDemand]: 534/539 looper letters, 39 selfloop transitions, 11 changer transitions 0/53 dead transitions. [2023-11-06 21:58:58,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 53 transitions, 374 flow [2023-11-06 21:58:58,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:58:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:58:58,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 902 transitions. [2023-11-06 21:58:58,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2023-11-06 21:58:58,882 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 902 transitions. [2023-11-06 21:58:58,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 902 transitions. [2023-11-06 21:58:58,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:58,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 902 transitions. [2023-11-06 21:58:58,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.5) internal successors, (902), 4 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:58,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 539.0) internal successors, (2695), 5 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:58,894 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 539.0) internal successors, (2695), 5 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:58,894 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 280 flow. Second operand 4 states and 902 transitions. [2023-11-06 21:58:58,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 53 transitions, 374 flow [2023-11-06 21:58:58,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 53 transitions, 294 flow, removed 32 selfloop flow, removed 5 redundant places. [2023-11-06 21:58:58,899 INFO L231 Difference]: Finished difference. Result has 62 places, 53 transitions, 216 flow [2023-11-06 21:58:58,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=62, PETRI_TRANSITIONS=53} [2023-11-06 21:58:58,900 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 1 predicate places. [2023-11-06 21:58:58,900 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 53 transitions, 216 flow [2023-11-06 21:58:58,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 218.25) internal successors, (873), 4 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:58,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:58,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 21:58:58,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:59,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:59,115 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 21:58:59,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:59,115 INFO L85 PathProgramCache]: Analyzing trace with hash 648197383, now seen corresponding path program 1 times [2023-11-06 21:58:59,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:58:59,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6468528] [2023-11-06 21:58:59,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:59,116 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:59,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:58:59,118 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:58:59,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-06 21:58:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:59,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:58:59,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:59,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:59,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:59,507 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-11-06 21:58:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:59,575 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:58:59,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6468528] [2023-11-06 21:58:59,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6468528] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:59,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:58:59,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 21:58:59,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847808253] [2023-11-06 21:58:59,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:59,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:58:59,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:58:59,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:58:59,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:59:02,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 539 [2023-11-06 21:59:02,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 53 transitions, 216 flow. Second operand has 10 states, 10 states have (on average 217.2) internal successors, (2172), 10 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:02,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:59:02,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 539 [2023-11-06 21:59:02,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:59:04,096 INFO L124 PetriNetUnfolderBase]: 1416/1921 cut-off events. [2023-11-06 21:59:04,097 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-06 21:59:04,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3939 conditions, 1921 events. 1416/1921 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 8016 event pairs, 277 based on Foata normal form. 0/1011 useless extension candidates. Maximal degree in co-relation 3918. Up to 1155 conditions per place. [2023-11-06 21:59:04,106 INFO L140 encePairwiseOnDemand]: 531/539 looper letters, 64 selfloop transitions, 18 changer transitions 0/84 dead transitions. [2023-11-06 21:59:04,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 84 transitions, 446 flow [2023-11-06 21:59:04,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:59:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 21:59:04,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1795 transitions. [2023-11-06 21:59:04,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4162801484230056 [2023-11-06 21:59:04,116 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1795 transitions. [2023-11-06 21:59:04,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1795 transitions. [2023-11-06 21:59:04,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:59:04,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1795 transitions. [2023-11-06 21:59:04,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 224.375) internal successors, (1795), 8 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:04,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 539.0) internal successors, (4851), 9 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:04,133 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 539.0) internal successors, (4851), 9 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:04,133 INFO L175 Difference]: Start difference. First operand has 62 places, 53 transitions, 216 flow. Second operand 8 states and 1795 transitions. [2023-11-06 21:59:04,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 84 transitions, 446 flow [2023-11-06 21:59:04,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 84 transitions, 434 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:59:04,137 INFO L231 Difference]: Finished difference. Result has 69 places, 56 transitions, 270 flow [2023-11-06 21:59:04,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=270, PETRI_PLACES=69, PETRI_TRANSITIONS=56} [2023-11-06 21:59:04,138 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 8 predicate places. [2023-11-06 21:59:04,139 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 56 transitions, 270 flow [2023-11-06 21:59:04,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.2) internal successors, (2172), 10 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:04,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:59:04,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:04,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:04,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:04,351 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 21:59:04,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:04,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1380404058, now seen corresponding path program 1 times [2023-11-06 21:59:04,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:59:04,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226265710] [2023-11-06 21:59:04,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:04,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:04,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:59:04,354 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:59:04,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-06 21:59:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:04,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:59:04,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:04,522 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 21:59:04,522 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 21:59:04,542 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 21:59:04,542 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 21:59:04,572 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 21:59:04,572 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 21:59:04,605 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 21:59:04,605 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 21:59:04,625 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 21:59:04,626 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 21:59:04,646 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 21:59:04,647 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 21:59:04,671 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 21:59:04,672 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 21:59:04,693 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 21:59:04,693 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 21:59:04,712 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 21:59:04,712 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 21:59:04,746 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 21:59:04,746 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 21:59:04,778 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 21:59:04,779 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-06 21:59:04,816 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 21:59:04,817 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-06 21:59:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:59:04,964 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:59:04,964 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:59:04,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226265710] [2023-11-06 21:59:04,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226265710] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:04,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:04,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:59:04,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685686648] [2023-11-06 21:59:04,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:04,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:59:04,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:59:04,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:59:04,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:59:05,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 539 [2023-11-06 21:59:05,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 56 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:05,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:59:05,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 539 [2023-11-06 21:59:05,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:59:05,633 INFO L124 PetriNetUnfolderBase]: 1143/1553 cut-off events. [2023-11-06 21:59:05,633 INFO L125 PetriNetUnfolderBase]: For 605/705 co-relation queries the response was YES. [2023-11-06 21:59:05,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3741 conditions, 1553 events. 1143/1553 cut-off events. For 605/705 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6245 event pairs, 620 based on Foata normal form. 100/1013 useless extension candidates. Maximal degree in co-relation 3718. Up to 1533 conditions per place. [2023-11-06 21:59:05,640 INFO L140 encePairwiseOnDemand]: 536/539 looper letters, 50 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-11-06 21:59:05,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 54 transitions, 368 flow [2023-11-06 21:59:05,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:59:05,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:59:05,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 706 transitions. [2023-11-06 21:59:05,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4366110080395795 [2023-11-06 21:59:05,644 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 706 transitions. [2023-11-06 21:59:05,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 706 transitions. [2023-11-06 21:59:05,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:59:05,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 706 transitions. [2023-11-06 21:59:05,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.33333333333334) internal successors, (706), 3 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:05,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:05,651 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 539.0) internal successors, (2156), 4 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:05,651 INFO L175 Difference]: Start difference. First operand has 69 places, 56 transitions, 270 flow. Second operand 3 states and 706 transitions. [2023-11-06 21:59:05,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 54 transitions, 368 flow [2023-11-06 21:59:05,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 54 transitions, 362 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 21:59:05,655 INFO L231 Difference]: Finished difference. Result has 66 places, 54 transitions, 262 flow [2023-11-06 21:59:05,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=66, PETRI_TRANSITIONS=54} [2023-11-06 21:59:05,656 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 5 predicate places. [2023-11-06 21:59:05,656 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 54 transitions, 262 flow [2023-11-06 21:59:05,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:05,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:59:05,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:05,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-11-06 21:59:05,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:05,868 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 21:59:05,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:05,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1380404057, now seen corresponding path program 1 times [2023-11-06 21:59:05,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:59:05,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641938936] [2023-11-06 21:59:05,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:05,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:05,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:59:05,870 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:59:05,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-06 21:59:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:06,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 21:59:06,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:06,071 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 21:59:06,071 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2023-11-06 21:59:06,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:06,108 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 21:59:06,108 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 21:59:06,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:06,173 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 21:59:06,173 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 21:59:06,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:06,212 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 21:59:06,213 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 21:59:06,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:06,260 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 21:59:06,261 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 21:59:06,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:06,295 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 21:59:06,295 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 21:59:06,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:06,334 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 21:59:06,335 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 21:59:06,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:06,373 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 21:59:06,373 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-11-06 21:59:06,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:06,432 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 21:59:06,433 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 21:59:06,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:06,495 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 21:59:06,495 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 21:59:06,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:06,558 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 21:59:06,559 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 21:59:06,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:06,639 INFO L322 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-06 21:59:06,639 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2023-11-06 21:59:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:07,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:07,597 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:59:07,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641938936] [2023-11-06 21:59:07,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641938936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:07,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:59:07,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-06 21:59:07,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569713858] [2023-11-06 21:59:07,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:07,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:59:07,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:59:07,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:59:07,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:59:10,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:59:11,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 539 [2023-11-06 21:59:11,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 54 transitions, 262 flow. Second operand has 8 states, 8 states have (on average 218.75) internal successors, (1750), 8 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:11,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:59:11,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 539 [2023-11-06 21:59:11,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:59:12,620 INFO L124 PetriNetUnfolderBase]: 1063/1439 cut-off events. [2023-11-06 21:59:12,620 INFO L125 PetriNetUnfolderBase]: For 565/655 co-relation queries the response was YES. [2023-11-06 21:59:12,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3462 conditions, 1439 events. 1063/1439 cut-off events. For 565/655 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 5657 event pairs, 571 based on Foata normal form. 90/953 useless extension candidates. Maximal degree in co-relation 3439. Up to 1417 conditions per place. [2023-11-06 21:59:12,632 INFO L140 encePairwiseOnDemand]: 534/539 looper letters, 45 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-11-06 21:59:12,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 52 transitions, 356 flow [2023-11-06 21:59:12,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:59:12,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:59:12,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1117 transitions. [2023-11-06 21:59:12,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41447124304267163 [2023-11-06 21:59:12,638 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1117 transitions. [2023-11-06 21:59:12,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1117 transitions. [2023-11-06 21:59:12,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:59:12,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1117 transitions. [2023-11-06 21:59:12,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 223.4) internal successors, (1117), 5 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:12,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 539.0) internal successors, (3234), 6 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:12,649 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 539.0) internal successors, (3234), 6 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:12,649 INFO L175 Difference]: Start difference. First operand has 66 places, 54 transitions, 262 flow. Second operand 5 states and 1117 transitions. [2023-11-06 21:59:12,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 52 transitions, 356 flow [2023-11-06 21:59:12,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 52 transitions, 355 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:59:12,654 INFO L231 Difference]: Finished difference. Result has 67 places, 52 transitions, 265 flow [2023-11-06 21:59:12,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=265, PETRI_PLACES=67, PETRI_TRANSITIONS=52} [2023-11-06 21:59:12,655 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 6 predicate places. [2023-11-06 21:59:12,655 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 52 transitions, 265 flow [2023-11-06 21:59:12,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 218.75) internal successors, (1750), 8 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:12,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:59:12,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:12,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:12,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:12,869 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 21:59:12,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:12,869 INFO L85 PathProgramCache]: Analyzing trace with hash 157138849, now seen corresponding path program 1 times [2023-11-06 21:59:12,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:59:12,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193076859] [2023-11-06 21:59:12,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:12,870 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:12,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:59:12,872 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:59:12,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-06 21:59:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:12,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:59:13,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:13,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:13,338 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-11-06 21:59:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:13,446 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:59:13,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193076859] [2023-11-06 21:59:13,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193076859] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:13,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:59:13,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 21:59:13,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416063617] [2023-11-06 21:59:13,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:13,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:59:13,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:59:13,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:59:13,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:59:16,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 539 [2023-11-06 21:59:16,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 52 transitions, 265 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:16,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:59:16,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 539 [2023-11-06 21:59:16,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:59:17,675 INFO L124 PetriNetUnfolderBase]: 1421/1933 cut-off events. [2023-11-06 21:59:17,675 INFO L125 PetriNetUnfolderBase]: For 854/988 co-relation queries the response was YES. [2023-11-06 21:59:17,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4687 conditions, 1933 events. 1421/1933 cut-off events. For 854/988 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 8084 event pairs, 370 based on Foata normal form. 134/1418 useless extension candidates. Maximal degree in co-relation 4663. Up to 1117 conditions per place. [2023-11-06 21:59:17,687 INFO L140 encePairwiseOnDemand]: 531/539 looper letters, 65 selfloop transitions, 18 changer transitions 0/85 dead transitions. [2023-11-06 21:59:17,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 85 transitions, 541 flow [2023-11-06 21:59:17,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:59:17,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 21:59:17,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1787 transitions. [2023-11-06 21:59:17,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144248608534323 [2023-11-06 21:59:17,694 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1787 transitions. [2023-11-06 21:59:17,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1787 transitions. [2023-11-06 21:59:17,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:59:17,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1787 transitions. [2023-11-06 21:59:17,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 223.375) internal successors, (1787), 8 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:17,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 539.0) internal successors, (4851), 9 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:17,709 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 539.0) internal successors, (4851), 9 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:17,709 INFO L175 Difference]: Start difference. First operand has 67 places, 52 transitions, 265 flow. Second operand 8 states and 1787 transitions. [2023-11-06 21:59:17,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 85 transitions, 541 flow [2023-11-06 21:59:17,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 85 transitions, 535 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 21:59:17,713 INFO L231 Difference]: Finished difference. Result has 73 places, 55 transitions, 325 flow [2023-11-06 21:59:17,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=325, PETRI_PLACES=73, PETRI_TRANSITIONS=55} [2023-11-06 21:59:17,714 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 12 predicate places. [2023-11-06 21:59:17,714 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 55 transitions, 325 flow [2023-11-06 21:59:17,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:17,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:59:17,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:17,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:17,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:17,927 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 21:59:17,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:17,929 INFO L85 PathProgramCache]: Analyzing trace with hash 147636549, now seen corresponding path program 1 times [2023-11-06 21:59:17,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:59:17,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510166668] [2023-11-06 21:59:17,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:17,929 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:17,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:59:17,930 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:59:17,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-06 21:59:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:18,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 21:59:18,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:18,067 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 21:59:18,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,078 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:59:18,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,086 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:59:18,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,095 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:18,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,106 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:18,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,123 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:59:18,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,146 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:59:18,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,155 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:18,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,163 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:59:18,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,172 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:18,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,178 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:59:18,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,188 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:18,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,209 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:59:18,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,220 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:18,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,227 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:59:18,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,237 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:18,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,247 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:18,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,254 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:59:18,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,289 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 21:59:18,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,308 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:59:18,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,326 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:59:18,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,336 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:18,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,356 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:59:18,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:18,366 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:59:18,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:59:18,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:59:18,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510166668] [2023-11-06 21:59:18,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510166668] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:18,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:59:18,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 21:59:18,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938472015] [2023-11-06 21:59:18,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:18,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:59:18,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:59:18,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:59:18,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:59:23,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 539 [2023-11-06 21:59:23,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 55 transitions, 325 flow. Second operand has 10 states, 10 states have (on average 218.6) internal successors, (2186), 10 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:23,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:59:23,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 539 [2023-11-06 21:59:23,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:59:25,758 INFO L124 PetriNetUnfolderBase]: 2707/3645 cut-off events. [2023-11-06 21:59:25,759 INFO L125 PetriNetUnfolderBase]: For 2308/2586 co-relation queries the response was YES. [2023-11-06 21:59:25,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10208 conditions, 3645 events. 2707/3645 cut-off events. For 2308/2586 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 16144 event pairs, 332 based on Foata normal form. 340/3059 useless extension candidates. Maximal degree in co-relation 10182. Up to 1188 conditions per place. [2023-11-06 21:59:25,785 INFO L140 encePairwiseOnDemand]: 532/539 looper letters, 121 selfloop transitions, 20 changer transitions 0/143 dead transitions. [2023-11-06 21:59:25,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 143 transitions, 913 flow [2023-11-06 21:59:25,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:59:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 21:59:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2061 transitions. [2023-11-06 21:59:25,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424860853432282 [2023-11-06 21:59:25,793 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2061 transitions. [2023-11-06 21:59:25,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2061 transitions. [2023-11-06 21:59:25,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:59:25,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2061 transitions. [2023-11-06 21:59:25,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 229.0) internal successors, (2061), 9 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:25,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 539.0) internal successors, (5390), 10 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:25,809 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 539.0) internal successors, (5390), 10 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:25,809 INFO L175 Difference]: Start difference. First operand has 73 places, 55 transitions, 325 flow. Second operand 9 states and 2061 transitions. [2023-11-06 21:59:25,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 143 transitions, 913 flow [2023-11-06 21:59:25,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 143 transitions, 897 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 21:59:25,817 INFO L231 Difference]: Finished difference. Result has 81 places, 60 transitions, 405 flow [2023-11-06 21:59:25,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=405, PETRI_PLACES=81, PETRI_TRANSITIONS=60} [2023-11-06 21:59:25,818 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 20 predicate places. [2023-11-06 21:59:25,818 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 60 transitions, 405 flow [2023-11-06 21:59:25,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 218.6) internal successors, (2186), 10 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:25,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:59:25,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:25,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:26,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:26,032 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 21:59:26,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:26,032 INFO L85 PathProgramCache]: Analyzing trace with hash 686794315, now seen corresponding path program 1 times [2023-11-06 21:59:26,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:59:26,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520682376] [2023-11-06 21:59:26,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:26,033 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:26,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:59:26,034 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:59:26,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-06 21:59:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:26,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 21:59:26,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:26,182 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 21:59:26,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,193 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:59:26,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,204 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:26,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,224 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:59:26,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,231 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:59:26,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,242 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:26,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,251 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:59:26,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,261 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:26,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,268 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:59:26,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,278 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:26,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,299 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:59:26,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,310 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:26,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,332 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:59:26,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,343 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:26,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,364 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:59:26,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,375 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:26,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,409 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 21:59:26,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,425 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:59:26,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,448 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:59:26,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,459 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:26,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,470 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:26,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,477 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:59:26,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,485 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:59:26,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:26,495 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:59:26,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:59:27,404 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:59:27,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520682376] [2023-11-06 21:59:27,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520682376] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:27,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:59:27,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 21:59:27,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646482588] [2023-11-06 21:59:27,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:27,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:59:27,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:59:27,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:59:27,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:59:32,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 539 [2023-11-06 21:59:32,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 60 transitions, 405 flow. Second operand has 12 states, 12 states have (on average 215.66666666666666) internal successors, (2588), 12 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:32,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:59:32,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 539 [2023-11-06 21:59:32,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:59:36,852 INFO L124 PetriNetUnfolderBase]: 5308/6998 cut-off events. [2023-11-06 21:59:36,852 INFO L125 PetriNetUnfolderBase]: For 10098/10566 co-relation queries the response was YES. [2023-11-06 21:59:36,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22344 conditions, 6998 events. 5308/6998 cut-off events. For 10098/10566 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 31838 event pairs, 997 based on Foata normal form. 468/5984 useless extension candidates. Maximal degree in co-relation 22314. Up to 2589 conditions per place. [2023-11-06 21:59:36,910 INFO L140 encePairwiseOnDemand]: 532/539 looper letters, 182 selfloop transitions, 24 changer transitions 0/208 dead transitions. [2023-11-06 21:59:36,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 208 transitions, 1645 flow [2023-11-06 21:59:36,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 21:59:36,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 21:59:36,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2480 transitions. [2023-11-06 21:59:36,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4182830156856131 [2023-11-06 21:59:36,918 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2480 transitions. [2023-11-06 21:59:36,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2480 transitions. [2023-11-06 21:59:36,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:59:36,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2480 transitions. [2023-11-06 21:59:36,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 225.45454545454547) internal successors, (2480), 11 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:36,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 539.0) internal successors, (6468), 12 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:36,932 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 539.0) internal successors, (6468), 12 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:36,933 INFO L175 Difference]: Start difference. First operand has 81 places, 60 transitions, 405 flow. Second operand 11 states and 2480 transitions. [2023-11-06 21:59:36,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 208 transitions, 1645 flow [2023-11-06 21:59:36,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 208 transitions, 1576 flow, removed 24 selfloop flow, removed 3 redundant places. [2023-11-06 21:59:36,962 INFO L231 Difference]: Finished difference. Result has 91 places, 68 transitions, 490 flow [2023-11-06 21:59:36,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=490, PETRI_PLACES=91, PETRI_TRANSITIONS=68} [2023-11-06 21:59:36,963 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 30 predicate places. [2023-11-06 21:59:36,963 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 68 transitions, 490 flow [2023-11-06 21:59:36,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 215.66666666666666) internal successors, (2588), 12 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:36,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:59:36,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:36,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:37,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:37,177 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 21:59:37,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:37,177 INFO L85 PathProgramCache]: Analyzing trace with hash 695401883, now seen corresponding path program 1 times [2023-11-06 21:59:37,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:59:37,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403321386] [2023-11-06 21:59:37,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:37,177 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:37,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:59:37,178 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:59:37,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-06 21:59:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:37,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 21:59:37,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:37,343 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 21:59:37,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,358 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:37,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,382 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:59:37,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,395 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:37,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,410 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:37,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,418 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:59:37,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,441 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:59:37,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,453 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:37,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,464 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:37,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,472 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:59:37,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,483 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:37,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,491 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:59:37,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,500 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:59:37,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,510 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:37,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,523 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:37,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,554 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:59:37,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,567 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:37,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,576 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:59:37,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,612 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:59:37,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,650 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 21:59:37,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,676 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:59:37,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,689 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:37,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,703 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:59:37,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:37,726 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:59:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:38,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:38,725 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:59:38,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403321386] [2023-11-06 21:59:38,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403321386] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:38,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:59:38,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 21:59:38,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308555114] [2023-11-06 21:59:38,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:38,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:59:38,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:59:38,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:59:38,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:59:49,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 539 [2023-11-06 21:59:49,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 68 transitions, 490 flow. Second operand has 10 states, 10 states have (on average 214.0) internal successors, (2140), 10 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:49,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:59:49,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 539 [2023-11-06 21:59:49,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:59:56,339 INFO L124 PetriNetUnfolderBase]: 16031/21615 cut-off events. [2023-11-06 21:59:56,339 INFO L125 PetriNetUnfolderBase]: For 51359/54409 co-relation queries the response was YES. [2023-11-06 21:59:56,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80735 conditions, 21615 events. 16031/21615 cut-off events. For 51359/54409 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 110019 event pairs, 9003 based on Foata normal form. 3050/22168 useless extension candidates. Maximal degree in co-relation 80702. Up to 6183 conditions per place. [2023-11-06 21:59:56,552 INFO L140 encePairwiseOnDemand]: 531/539 looper letters, 239 selfloop transitions, 15 changer transitions 0/256 dead transitions. [2023-11-06 21:59:56,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 256 transitions, 2138 flow [2023-11-06 21:59:56,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 21:59:56,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 21:59:56,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2462 transitions. [2023-11-06 21:59:56,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152470905717659 [2023-11-06 21:59:56,560 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2462 transitions. [2023-11-06 21:59:56,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2462 transitions. [2023-11-06 21:59:56,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:59:56,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2462 transitions. [2023-11-06 21:59:56,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 223.8181818181818) internal successors, (2462), 11 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:56,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 539.0) internal successors, (6468), 12 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:56,577 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 539.0) internal successors, (6468), 12 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:56,577 INFO L175 Difference]: Start difference. First operand has 91 places, 68 transitions, 490 flow. Second operand 11 states and 2462 transitions. [2023-11-06 21:59:56,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 256 transitions, 2138 flow [2023-11-06 21:59:56,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 256 transitions, 1946 flow, removed 24 selfloop flow, removed 5 redundant places. [2023-11-06 21:59:56,772 INFO L231 Difference]: Finished difference. Result has 98 places, 74 transitions, 500 flow [2023-11-06 21:59:56,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=500, PETRI_PLACES=98, PETRI_TRANSITIONS=74} [2023-11-06 21:59:56,773 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 37 predicate places. [2023-11-06 21:59:56,773 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 74 transitions, 500 flow [2023-11-06 21:59:56,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 214.0) internal successors, (2140), 10 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:56,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:59:56,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:56,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:56,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:56,986 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 21:59:56,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:56,987 INFO L85 PathProgramCache]: Analyzing trace with hash 82627359, now seen corresponding path program 1 times [2023-11-06 21:59:56,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:59:56,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307307215] [2023-11-06 21:59:56,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:56,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:56,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:59:56,988 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:59:56,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-06 21:59:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:57,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 21:59:57,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:57,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:57,732 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:59:57,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307307215] [2023-11-06 21:59:57,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307307215] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:57,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:59:57,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 21:59:57,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254685066] [2023-11-06 21:59:57,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:57,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:59:57,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:59:57,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:59:57,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:59:59,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 539 [2023-11-06 21:59:59,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 74 transitions, 500 flow. Second operand has 12 states, 12 states have (on average 220.83333333333334) internal successors, (2650), 12 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:59,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:59:59,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 539 [2023-11-06 21:59:59,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:00:04,179 INFO L124 PetriNetUnfolderBase]: 13903/18859 cut-off events. [2023-11-06 22:00:04,179 INFO L125 PetriNetUnfolderBase]: For 36368/39074 co-relation queries the response was YES. [2023-11-06 22:00:04,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72592 conditions, 18859 events. 13903/18859 cut-off events. For 36368/39074 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 95085 event pairs, 8301 based on Foata normal form. 2706/19568 useless extension candidates. Maximal degree in co-relation 72558. Up to 13290 conditions per place. [2023-11-06 22:00:04,356 INFO L140 encePairwiseOnDemand]: 531/539 looper letters, 167 selfloop transitions, 8 changer transitions 0/177 dead transitions. [2023-11-06 22:00:04,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 177 transitions, 1430 flow [2023-11-06 22:00:04,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:00:04,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:00:04,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1835 transitions. [2023-11-06 22:00:04,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425556586270872 [2023-11-06 22:00:04,362 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1835 transitions. [2023-11-06 22:00:04,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1835 transitions. [2023-11-06 22:00:04,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:00:04,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1835 transitions. [2023-11-06 22:00:04,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 229.375) internal successors, (1835), 8 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:04,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 539.0) internal successors, (4851), 9 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:04,370 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 539.0) internal successors, (4851), 9 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:04,370 INFO L175 Difference]: Start difference. First operand has 98 places, 74 transitions, 500 flow. Second operand 8 states and 1835 transitions. [2023-11-06 22:00:04,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 177 transitions, 1430 flow [2023-11-06 22:00:04,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 177 transitions, 1399 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-11-06 22:00:04,486 INFO L231 Difference]: Finished difference. Result has 98 places, 74 transitions, 494 flow [2023-11-06 22:00:04,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=494, PETRI_PLACES=98, PETRI_TRANSITIONS=74} [2023-11-06 22:00:04,487 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 37 predicate places. [2023-11-06 22:00:04,487 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 74 transitions, 494 flow [2023-11-06 22:00:04,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 220.83333333333334) internal successors, (2650), 12 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:04,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:00:04,488 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-11-06 22:00:04,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:04,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:00:04,688 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 22:00:04,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:04,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1648406325, now seen corresponding path program 3 times [2023-11-06 22:00:04,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:00:04,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609371626] [2023-11-06 22:00:04,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:00:04,689 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:00:04,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:00:04,691 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:00:04,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-06 22:00:04,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 22:00:04,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:00:04,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:00:04,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:04,940 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 22:00:04,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:04,963 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:00:04,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:04,992 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:00:05,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,012 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:00:05,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,023 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:00:05,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,040 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:00:05,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,052 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:00:05,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,059 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:00:05,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,070 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:00:05,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,087 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:00:05,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,096 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:00:05,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,107 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:00:05,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,121 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:00:05,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,139 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:00:05,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,149 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:00:05,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,156 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:00:05,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,162 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:00:05,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,172 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:00:05,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,183 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:00:05,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,190 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:00:05,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,200 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:00:05,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,206 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:00:05,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,225 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:00:05,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:00:05,235 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:00:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:05,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:09,116 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:00:09,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609371626] [2023-11-06 22:00:09,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609371626] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:00:09,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:00:09,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-11-06 22:00:09,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017659012] [2023-11-06 22:00:09,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:00:09,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:00:09,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:00:09,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:00:09,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:00:40,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 539 [2023-11-06 22:00:40,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 74 transitions, 494 flow. Second operand has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:40,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:00:40,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 539 [2023-11-06 22:00:40,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:04,114 INFO L124 PetriNetUnfolderBase]: 12675/17037 cut-off events. [2023-11-06 22:01:04,114 INFO L125 PetriNetUnfolderBase]: For 34932/37844 co-relation queries the response was YES. [2023-11-06 22:01:04,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69577 conditions, 17037 events. 12675/17037 cut-off events. For 34932/37844 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 87463 event pairs, 8271 based on Foata normal form. 2924/17664 useless extension candidates. Maximal degree in co-relation 69544. Up to 16980 conditions per place. [2023-11-06 22:01:04,287 INFO L140 encePairwiseOnDemand]: 535/539 looper letters, 49 selfloop transitions, 44 changer transitions 0/98 dead transitions. [2023-11-06 22:01:04,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 98 transitions, 920 flow [2023-11-06 22:01:04,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:01:04,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:01:04,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5434 transitions. [2023-11-06 22:01:04,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4200680272108844 [2023-11-06 22:01:04,295 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5434 transitions. [2023-11-06 22:01:04,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5434 transitions. [2023-11-06 22:01:04,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:04,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5434 transitions. [2023-11-06 22:01:04,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 226.41666666666666) internal successors, (5434), 24 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:04,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 539.0) internal successors, (13475), 25 states have internal predecessors, (13475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:04,318 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 539.0) internal successors, (13475), 25 states have internal predecessors, (13475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:04,318 INFO L175 Difference]: Start difference. First operand has 98 places, 74 transitions, 494 flow. Second operand 24 states and 5434 transitions. [2023-11-06 22:01:04,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 98 transitions, 920 flow [2023-11-06 22:01:04,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 98 transitions, 903 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-06 22:01:04,466 INFO L231 Difference]: Finished difference. Result has 128 places, 98 transitions, 869 flow [2023-11-06 22:01:04,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=539, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=869, PETRI_PLACES=128, PETRI_TRANSITIONS=98} [2023-11-06 22:01:04,466 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 67 predicate places. [2023-11-06 22:01:04,467 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 98 transitions, 869 flow [2023-11-06 22:01:04,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:04,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:04,468 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:04,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:04,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:01:04,668 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-06 22:01:04,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:04,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1673984170, now seen corresponding path program 2 times [2023-11-06 22:01:04,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:01:04,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281363388] [2023-11-06 22:01:04,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:01:04,669 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:01:04,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:01:04,670 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:01:04,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0bd0c51-2114-4039-a0d3-47aabf5afcbc/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-06 22:01:04,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:01:04,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:04,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:01:04,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:04,901 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 22:01:04,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:04,914 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:01:04,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:04,940 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:01:04,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:04,952 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:01:04,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:04,969 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:01:04,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:04,979 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:01:05,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:05,009 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:01:05,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:05,024 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:01:05,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:05,055 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:01:05,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:05,098 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:01:05,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:05,113 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:01:05,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:05,140 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:01:05,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:05,158 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:01:05,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:05,167 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:01:05,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:05,185 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:01:05,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:05,215 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:01:05,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:05,229 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:01:05,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:05,239 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:01:05,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:05,254 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:01:05,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:05,263 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:01:05,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:05,279 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:01:05,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:05,306 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:01:05,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:05,321 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:01:05,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:05,331 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:01:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:05,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:07,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:01:07,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281363388] [2023-11-06 22:01:07,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281363388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:07,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:01:07,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-06 22:01:07,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191660412] [2023-11-06 22:01:07,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:07,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:01:07,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:01:07,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:01:07,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182