./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:35:13,531 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:35:13,591 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 00:35:13,595 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:35:13,596 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:35:13,615 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:35:13,616 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:35:13,616 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:35:13,617 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:35:13,618 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:35:13,618 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:35:13,619 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:35:13,619 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:35:13,620 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:35:13,621 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:35:13,621 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:35:13,622 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:35:13,622 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:35:13,623 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:35:13,623 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:35:13,624 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 00:35:13,624 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 00:35:13,625 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 00:35:13,625 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:35:13,625 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:35:13,626 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:35:13,626 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:35:13,627 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:35:13,627 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:35:13,628 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:35:13,628 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:35:13,629 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:35:13,629 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:35:13,629 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:35:13,629 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:35:13,630 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:35:13,630 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:35:13,630 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:35:13,630 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:35:13,630 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:35:13,631 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:35:13,631 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_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 [2023-11-29 00:35:13,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:35:13,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:35:13,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:35:13,880 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:35:13,880 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:35:13,882 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2023-11-29 00:35:16,630 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:35:16,799 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:35:16,800 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2023-11-29 00:35:16,807 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/data/47b6290ff/d73bd09c8ca844b5879b84d9bbd21fc3/FLAG50813c47a [2023-11-29 00:35:16,822 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/data/47b6290ff/d73bd09c8ca844b5879b84d9bbd21fc3 [2023-11-29 00:35:16,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:35:16,826 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:35:16,827 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:35:16,827 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:35:16,833 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:35:16,833 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:35:16" (1/1) ... [2023-11-29 00:35:16,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dec4c41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:16, skipping insertion in model container [2023-11-29 00:35:16,835 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:35:16" (1/1) ... [2023-11-29 00:35:16,860 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:35:17,047 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:35:17,059 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) [2023-11-29 00:35:17,059 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5b321e4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:17, skipping insertion in model container [2023-11-29 00:35:17,060 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:35:17,060 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-29 00:35:17,061 INFO L158 Benchmark]: Toolchain (without parser) took 234.88ms. Allocated memory is still 153.1MB. Free memory was 113.6MB in the beginning and 103.6MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 00:35:17,062 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 153.1MB. Free memory is still 124.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 00:35:17,062 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.70ms. Allocated memory is still 153.1MB. Free memory was 113.6MB in the beginning and 103.6MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 00:35:17,064 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 153.1MB. Free memory is still 124.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 232.70ms. Allocated memory is still 153.1MB. Free memory was 113.6MB in the beginning and 103.6MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 123]: 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_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:35:18,719 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:35:18,787 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 00:35:18,799 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:35:18,800 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:35:18,827 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:35:18,827 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:35:18,828 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:35:18,829 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:35:18,829 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:35:18,830 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:35:18,830 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:35:18,831 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:35:18,832 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:35:18,832 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:35:18,833 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:35:18,833 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:35:18,834 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:35:18,834 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:35:18,835 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:35:18,835 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 00:35:18,836 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 00:35:18,836 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 00:35:18,837 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:35:18,837 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:35:18,837 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 00:35:18,838 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 00:35:18,838 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:35:18,838 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:35:18,839 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:35:18,839 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:35:18,840 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:35:18,840 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:35:18,840 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:35:18,841 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:35:18,841 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:35:18,841 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:35:18,841 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 00:35:18,841 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 00:35:18,842 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:35:18,842 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:35:18,842 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:35:18,842 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:35:18,842 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 00:35:18,843 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_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 [2023-11-29 00:35:19,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:35:19,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:35:19,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:35:19,138 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:35:19,139 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:35:19,140 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2023-11-29 00:35:21,993 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:35:22,189 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:35:22,190 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2023-11-29 00:35:22,199 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/data/27b48fbde/63de0666e2dd4a9c8dc9173baa9d5454/FLAG785fe63d2 [2023-11-29 00:35:22,214 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/data/27b48fbde/63de0666e2dd4a9c8dc9173baa9d5454 [2023-11-29 00:35:22,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:35:22,218 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:35:22,220 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:35:22,220 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:35:22,225 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:35:22,226 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:35:22" (1/1) ... [2023-11-29 00:35:22,227 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f7bc4d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:22, skipping insertion in model container [2023-11-29 00:35:22,227 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:35:22" (1/1) ... [2023-11-29 00:35:22,252 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:35:22,451 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:35:22,466 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 00:35:22,471 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:35:22,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:35:22,500 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:35:22,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:35:22,539 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:35:22,540 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:35:22,547 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:35:22,548 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:22 WrapperNode [2023-11-29 00:35:22,548 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:35:22,549 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:35:22,549 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:35:22,550 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:35:22,557 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:22" (1/1) ... [2023-11-29 00:35:22,570 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:22" (1/1) ... [2023-11-29 00:35:22,598 INFO L138 Inliner]: procedures = 28, calls = 58, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 235 [2023-11-29 00:35:22,599 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:35:22,600 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:35:22,600 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:35:22,600 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:35:22,611 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:22" (1/1) ... [2023-11-29 00:35:22,612 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:22" (1/1) ... [2023-11-29 00:35:22,628 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:22" (1/1) ... [2023-11-29 00:35:22,648 INFO L175 MemorySlicer]: Split 24 memory accesses to 5 slices as follows [2, 2, 2, 2, 16]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 1, 1, 1, 4]. [2023-11-29 00:35:22,648 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:22" (1/1) ... [2023-11-29 00:35:22,648 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:22" (1/1) ... [2023-11-29 00:35:22,663 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:22" (1/1) ... [2023-11-29 00:35:22,668 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:22" (1/1) ... [2023-11-29 00:35:22,671 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:22" (1/1) ... [2023-11-29 00:35:22,674 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:22" (1/1) ... [2023-11-29 00:35:22,679 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:35:22,680 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:35:22,680 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:35:22,681 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:35:22,681 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:22" (1/1) ... [2023-11-29 00:35:22,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:35:22,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:35:22,709 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:35:22,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:35:22,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:35:22,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 00:35:22,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 00:35:22,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 00:35:22,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 00:35:22,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-29 00:35:22,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:35:22,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 00:35:22,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 00:35:22,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 00:35:22,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 00:35:22,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-29 00:35:22,748 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 00:35:22,749 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 00:35:22,749 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 00:35:22,749 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 00:35:22,749 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 00:35:22,749 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 00:35:22,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 00:35:22,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 00:35:22,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 00:35:22,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:35:22,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:35:22,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:35:22,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 00:35:22,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 00:35:22,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 00:35:22,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 00:35:22,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-29 00:35:22,753 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 00:35:22,887 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:35:22,889 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:35:23,663 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:35:24,089 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:35:24,090 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-29 00:35:24,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:35:24 BoogieIcfgContainer [2023-11-29 00:35:24,090 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:35:24,092 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:35:24,092 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:35:24,094 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:35:24,095 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:35:22" (1/3) ... [2023-11-29 00:35:24,095 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e33a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:35:24, skipping insertion in model container [2023-11-29 00:35:24,095 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:35:22" (2/3) ... [2023-11-29 00:35:24,096 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e33a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:35:24, skipping insertion in model container [2023-11-29 00:35:24,096 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:35:24" (3/3) ... [2023-11-29 00:35:24,097 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2023-11-29 00:35:24,112 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:35:24,112 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2023-11-29 00:35:24,112 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:35:24,200 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 00:35:24,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 109 transitions, 239 flow [2023-11-29 00:35:24,267 INFO L124 PetriNetUnfolderBase]: 9/106 cut-off events. [2023-11-29 00:35:24,268 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 00:35:24,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 106 events. 9/106 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 294 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2023-11-29 00:35:24,274 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 109 transitions, 239 flow [2023-11-29 00:35:24,279 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 105 transitions, 228 flow [2023-11-29 00:35:24,289 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:35:24,294 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;@508e4f84, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:35:24,295 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2023-11-29 00:35:24,297 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:35:24,298 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-29 00:35:24,298 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:35:24,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:24,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:35:24,299 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:35:24,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:24,303 INFO L85 PathProgramCache]: Analyzing trace with hash 906199, now seen corresponding path program 1 times [2023-11-29 00:35:24,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:24,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825745478] [2023-11-29 00:35:24,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:24,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:24,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:24,315 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:35:24,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:24,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:35:24,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:24,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:35:24,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:35:24,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:24,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:35:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:24,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:35:24,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:24,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:35:24,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:35:24,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:24,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:24,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:35:24,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:24,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:35:24,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:24,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:35:24,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:24,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:35:24,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:35:24,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 00:35:24,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:35:24,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:24,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:35:24,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:24,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:24,829 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:24,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:24,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825745478] [2023-11-29 00:35:24,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825745478] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:24,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:24,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:35:24,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315966468] [2023-11-29 00:35:24,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:24,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:35:24,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:24,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:35:24,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:35:25,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 109 [2023-11-29 00:35:25,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 105 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:25,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:25,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 109 [2023-11-29 00:35:25,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:26,230 INFO L124 PetriNetUnfolderBase]: 2959/4983 cut-off events. [2023-11-29 00:35:26,230 INFO L125 PetriNetUnfolderBase]: For 279/281 co-relation queries the response was YES. [2023-11-29 00:35:26,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9091 conditions, 4983 events. 2959/4983 cut-off events. For 279/281 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 34924 event pairs, 2124 based on Foata normal form. 1/3393 useless extension candidates. Maximal degree in co-relation 8893. Up to 3872 conditions per place. [2023-11-29 00:35:26,286 INFO L140 encePairwiseOnDemand]: 101/109 looper letters, 46 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-11-29 00:35:26,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 98 transitions, 310 flow [2023-11-29 00:35:26,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:35:26,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:35:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 216 transitions. [2023-11-29 00:35:26,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6605504587155964 [2023-11-29 00:35:26,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 216 transitions. [2023-11-29 00:35:26,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 216 transitions. [2023-11-29 00:35:26,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:26,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 216 transitions. [2023-11-29 00:35:26,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:26,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:26,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:26,315 INFO L175 Difference]: Start difference. First operand has 106 places, 105 transitions, 228 flow. Second operand 3 states and 216 transitions. [2023-11-29 00:35:26,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 98 transitions, 310 flow [2023-11-29 00:35:26,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 98 transitions, 298 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 00:35:26,325 INFO L231 Difference]: Finished difference. Result has 95 places, 98 transitions, 206 flow [2023-11-29 00:35:26,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=95, PETRI_TRANSITIONS=98} [2023-11-29 00:35:26,330 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -11 predicate places. [2023-11-29 00:35:26,330 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 98 transitions, 206 flow [2023-11-29 00:35:26,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:26,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:26,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:35:26,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:26,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:26,534 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:35:26,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:26,535 INFO L85 PathProgramCache]: Analyzing trace with hash 906200, now seen corresponding path program 1 times [2023-11-29 00:35:26,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:26,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258424679] [2023-11-29 00:35:26,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:26,536 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 [2023-11-29 00:35:26,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:26,538 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:35:26,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:26,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:35:26,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:26,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-29 00:35:26,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:26,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:26,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:26,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:26,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:26,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:26,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:26,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:26,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:26,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:26,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:26,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:26,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:26,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:26,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:26,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:26,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:26,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:26,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:26,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:26,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:26,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:26,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:26,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:27,069 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:27,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:27,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258424679] [2023-11-29 00:35:27,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258424679] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:27,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:27,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:35:27,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045087647] [2023-11-29 00:35:27,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:27,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:35:27,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:27,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:35:27,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:35:27,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 109 [2023-11-29 00:35:27,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 98 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:27,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:27,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 109 [2023-11-29 00:35:27,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:28,401 INFO L124 PetriNetUnfolderBase]: 2959/4985 cut-off events. [2023-11-29 00:35:28,401 INFO L125 PetriNetUnfolderBase]: For 67/69 co-relation queries the response was YES. [2023-11-29 00:35:28,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8953 conditions, 4985 events. 2959/4985 cut-off events. For 67/69 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 34922 event pairs, 2124 based on Foata normal form. 0/3392 useless extension candidates. Maximal degree in co-relation 8918. Up to 3884 conditions per place. [2023-11-29 00:35:28,450 INFO L140 encePairwiseOnDemand]: 105/109 looper letters, 51 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2023-11-29 00:35:28,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 100 transitions, 316 flow [2023-11-29 00:35:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:35:28,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:35:28,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 217 transitions. [2023-11-29 00:35:28,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6636085626911316 [2023-11-29 00:35:28,454 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 217 transitions. [2023-11-29 00:35:28,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 217 transitions. [2023-11-29 00:35:28,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:28,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 217 transitions. [2023-11-29 00:35:28,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:28,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:28,458 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:28,458 INFO L175 Difference]: Start difference. First operand has 95 places, 98 transitions, 206 flow. Second operand 3 states and 217 transitions. [2023-11-29 00:35:28,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 100 transitions, 316 flow [2023-11-29 00:35:28,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 100 transitions, 312 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:35:28,462 INFO L231 Difference]: Finished difference. Result has 96 places, 99 transitions, 216 flow [2023-11-29 00:35:28,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=96, PETRI_TRANSITIONS=99} [2023-11-29 00:35:28,463 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -10 predicate places. [2023-11-29 00:35:28,463 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 99 transitions, 216 flow [2023-11-29 00:35:28,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:28,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:28,464 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-29 00:35:28,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 00:35:28,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:28,666 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:35:28,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:28,667 INFO L85 PathProgramCache]: Analyzing trace with hash 870888929, now seen corresponding path program 1 times [2023-11-29 00:35:28,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:28,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560861148] [2023-11-29 00:35:28,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:28,667 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 [2023-11-29 00:35:28,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:28,668 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:35:28,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:28,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:35:28,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:28,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:35:28,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:28,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:28,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:28,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:28,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:28,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:28,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:28,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:28,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:28,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:28,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:28,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:28,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:28,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:28,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:28,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:28,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:28,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:28,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:28,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:28,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:28,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:28,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:28,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:28,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:28,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:28,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:28,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:28,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:28,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:29,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:29,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:35:29,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:29,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:29,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:29,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:29,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:29,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:29,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:29,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:29,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:29,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:29,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:29,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:29,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:29,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:29,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:35:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:29,606 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:29,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560861148] [2023-11-29 00:35:29,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560861148] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:35:29,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:35:29,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2023-11-29 00:35:29,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938230217] [2023-11-29 00:35:29,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:35:29,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:35:29,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:29,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:35:29,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:35:31,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 109 [2023-11-29 00:35:31,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 99 transitions, 216 flow. Second operand has 9 states, 9 states have (on average 55.111111111111114) internal successors, (496), 9 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:31,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:31,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 109 [2023-11-29 00:35:31,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:32,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:35:34,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:35:35,866 INFO L124 PetriNetUnfolderBase]: 2966/5006 cut-off events. [2023-11-29 00:35:35,866 INFO L125 PetriNetUnfolderBase]: For 67/69 co-relation queries the response was YES. [2023-11-29 00:35:35,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9006 conditions, 5006 events. 2966/5006 cut-off events. For 67/69 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 34958 event pairs, 2124 based on Foata normal form. 0/3409 useless extension candidates. Maximal degree in co-relation 8993. Up to 3886 conditions per place. [2023-11-29 00:35:35,908 INFO L140 encePairwiseOnDemand]: 96/109 looper letters, 51 selfloop transitions, 23 changer transitions 0/121 dead transitions. [2023-11-29 00:35:35,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 121 transitions, 420 flow [2023-11-29 00:35:35,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:35:35,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 00:35:35,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 567 transitions. [2023-11-29 00:35:35,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5779816513761468 [2023-11-29 00:35:35,915 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 567 transitions. [2023-11-29 00:35:35,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 567 transitions. [2023-11-29 00:35:35,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:35,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 567 transitions. [2023-11-29 00:35:35,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 63.0) internal successors, (567), 9 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:35,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 109.0) internal successors, (1090), 10 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:35,923 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 109.0) internal successors, (1090), 10 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:35,923 INFO L175 Difference]: Start difference. First operand has 96 places, 99 transitions, 216 flow. Second operand 9 states and 567 transitions. [2023-11-29 00:35:35,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 121 transitions, 420 flow [2023-11-29 00:35:35,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 121 transitions, 418 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:35:35,927 INFO L231 Difference]: Finished difference. Result has 106 places, 121 transitions, 364 flow [2023-11-29 00:35:35,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=364, PETRI_PLACES=106, PETRI_TRANSITIONS=121} [2023-11-29 00:35:35,928 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 0 predicate places. [2023-11-29 00:35:35,928 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 121 transitions, 364 flow [2023-11-29 00:35:35,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.111111111111114) internal successors, (496), 9 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:35,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:35,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:35,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 00:35:36,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:36,132 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:35:36,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:36,132 INFO L85 PathProgramCache]: Analyzing trace with hash -594250888, now seen corresponding path program 1 times [2023-11-29 00:35:36,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:36,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490626418] [2023-11-29 00:35:36,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:36,133 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 [2023-11-29 00:35:36,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:36,134 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:35:36,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:36,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:35:36,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:36,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:35:36,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:36,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:36,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490626418] [2023-11-29 00:35:36,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490626418] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:35:36,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:35:36,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-11-29 00:35:36,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703882679] [2023-11-29 00:35:36,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:35:36,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:35:36,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:36,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:35:36,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:35:36,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 109 [2023-11-29 00:35:36,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 121 transitions, 364 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:36,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:36,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 109 [2023-11-29 00:35:36,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:38,899 INFO L124 PetriNetUnfolderBase]: 5927/10310 cut-off events. [2023-11-29 00:35:38,899 INFO L125 PetriNetUnfolderBase]: For 144/148 co-relation queries the response was YES. [2023-11-29 00:35:38,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18362 conditions, 10310 events. 5927/10310 cut-off events. For 144/148 co-relation queries the response was YES. Maximal size of possible extension queue 753. Compared 83784 event pairs, 4248 based on Foata normal form. 4/6921 useless extension candidates. Maximal degree in co-relation 9182. Up to 3879 conditions per place. [2023-11-29 00:35:38,952 INFO L140 encePairwiseOnDemand]: 99/109 looper letters, 84 selfloop transitions, 49 changer transitions 0/183 dead transitions. [2023-11-29 00:35:38,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 183 transitions, 820 flow [2023-11-29 00:35:38,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:35:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 00:35:38,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 755 transitions. [2023-11-29 00:35:38,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296914095079232 [2023-11-29 00:35:38,956 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 755 transitions. [2023-11-29 00:35:38,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 755 transitions. [2023-11-29 00:35:38,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:38,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 755 transitions. [2023-11-29 00:35:38,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 68.63636363636364) internal successors, (755), 11 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:38,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 109.0) internal successors, (1308), 12 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:38,962 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 109.0) internal successors, (1308), 12 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:38,962 INFO L175 Difference]: Start difference. First operand has 106 places, 121 transitions, 364 flow. Second operand 11 states and 755 transitions. [2023-11-29 00:35:38,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 183 transitions, 820 flow [2023-11-29 00:35:38,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 183 transitions, 806 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-29 00:35:38,969 INFO L231 Difference]: Finished difference. Result has 119 places, 142 transitions, 585 flow [2023-11-29 00:35:38,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=585, PETRI_PLACES=119, PETRI_TRANSITIONS=142} [2023-11-29 00:35:38,970 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 13 predicate places. [2023-11-29 00:35:38,970 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 142 transitions, 585 flow [2023-11-29 00:35:38,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:38,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:38,971 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2023-11-29 00:35:38,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 00:35:39,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:39,172 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:35:39,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:39,172 INFO L85 PathProgramCache]: Analyzing trace with hash 554085083, now seen corresponding path program 1 times [2023-11-29 00:35:39,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:39,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564829247] [2023-11-29 00:35:39,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:39,173 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 [2023-11-29 00:35:39,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:39,174 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:35:39,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:39,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 00:35:39,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:39,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:35:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:39,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:35:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:35:40,086 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:40,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564829247] [2023-11-29 00:35:40,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564829247] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:35:40,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:35:40,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-29 00:35:40,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957702015] [2023-11-29 00:35:40,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:35:40,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 00:35:40,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:40,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 00:35:40,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:35:42,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 109 [2023-11-29 00:35:42,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 142 transitions, 585 flow. Second operand has 11 states, 11 states have (on average 55.81818181818182) internal successors, (614), 11 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:42,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:42,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 109 [2023-11-29 00:35:42,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:44,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:35:49,519 INFO L124 PetriNetUnfolderBase]: 11842/20581 cut-off events. [2023-11-29 00:35:49,520 INFO L125 PetriNetUnfolderBase]: For 289/297 co-relation queries the response was YES. [2023-11-29 00:35:49,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36687 conditions, 20581 events. 11842/20581 cut-off events. For 289/297 co-relation queries the response was YES. Maximal size of possible extension queue 1241. Compared 180403 event pairs, 8496 based on Foata normal form. 4/13810 useless extension candidates. Maximal degree in co-relation 27535. Up to 7760 conditions per place. [2023-11-29 00:35:49,684 INFO L140 encePairwiseOnDemand]: 98/109 looper letters, 98 selfloop transitions, 56 changer transitions 2/203 dead transitions. [2023-11-29 00:35:49,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 203 transitions, 1139 flow [2023-11-29 00:35:49,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:35:49,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 00:35:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 772 transitions. [2023-11-29 00:35:49,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902140672782875 [2023-11-29 00:35:49,690 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 772 transitions. [2023-11-29 00:35:49,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 772 transitions. [2023-11-29 00:35:49,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:49,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 772 transitions. [2023-11-29 00:35:49,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 64.33333333333333) internal successors, (772), 12 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:49,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 109.0) internal successors, (1417), 13 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:49,698 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 109.0) internal successors, (1417), 13 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:49,698 INFO L175 Difference]: Start difference. First operand has 119 places, 142 transitions, 585 flow. Second operand 12 states and 772 transitions. [2023-11-29 00:35:49,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 203 transitions, 1139 flow [2023-11-29 00:35:49,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 203 transitions, 1137 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-29 00:35:49,710 INFO L231 Difference]: Finished difference. Result has 133 places, 157 transitions, 819 flow [2023-11-29 00:35:49,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=819, PETRI_PLACES=133, PETRI_TRANSITIONS=157} [2023-11-29 00:35:49,715 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 27 predicate places. [2023-11-29 00:35:49,716 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 157 transitions, 819 flow [2023-11-29 00:35:49,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 55.81818181818182) internal successors, (614), 11 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:49,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:49,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:49,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 00:35:49,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:49,920 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:35:49,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:49,921 INFO L85 PathProgramCache]: Analyzing trace with hash -4100272, now seen corresponding path program 1 times [2023-11-29 00:35:49,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:49,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690239349] [2023-11-29 00:35:49,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:49,922 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 [2023-11-29 00:35:49,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:49,923 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:35:49,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:50,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:35:50,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:50,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:35:50,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:35:50,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:50,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:35:50,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:35:50,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:50,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:50,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:35:50,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 00:35:50,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:35:50,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:50,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:35:50,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:35:50,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:50,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:50,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:35:50,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:35:50,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:50,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:35:50,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:50,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 00:35:50,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:50,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:35:50,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:50,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:35:50,500 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-29 00:35:50,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-29 00:35:50,530 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 00:35:50,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 00:35:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:35:50,551 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:35:50,552 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:50,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690239349] [2023-11-29 00:35:50,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690239349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:35:50,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:35:50,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:35:50,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011290752] [2023-11-29 00:35:50,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:35:50,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:35:50,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:50,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:35:50,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:35:50,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 109 [2023-11-29 00:35:50,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 157 transitions, 819 flow. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:50,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:35:50,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 109 [2023-11-29 00:35:50,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:35:53,224 INFO L124 PetriNetUnfolderBase]: 11974/20989 cut-off events. [2023-11-29 00:35:53,224 INFO L125 PetriNetUnfolderBase]: For 284/292 co-relation queries the response was YES. [2023-11-29 00:35:53,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37397 conditions, 20989 events. 11974/20989 cut-off events. For 284/292 co-relation queries the response was YES. Maximal size of possible extension queue 1170. Compared 180065 event pairs, 8716 based on Foata normal form. 0/14345 useless extension candidates. Maximal degree in co-relation 37355. Up to 15712 conditions per place. [2023-11-29 00:35:53,339 INFO L140 encePairwiseOnDemand]: 101/109 looper letters, 93 selfloop transitions, 15 changer transitions 0/152 dead transitions. [2023-11-29 00:35:53,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 152 transitions, 1025 flow [2023-11-29 00:35:53,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:35:53,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:35:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 294 transitions. [2023-11-29 00:35:53,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5394495412844037 [2023-11-29 00:35:53,342 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 294 transitions. [2023-11-29 00:35:53,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 294 transitions. [2023-11-29 00:35:53,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:35:53,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 294 transitions. [2023-11-29 00:35:53,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:53,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:53,345 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:53,345 INFO L175 Difference]: Start difference. First operand has 133 places, 157 transitions, 819 flow. Second operand 5 states and 294 transitions. [2023-11-29 00:35:53,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 152 transitions, 1025 flow [2023-11-29 00:35:53,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 152 transitions, 1000 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-29 00:35:53,349 INFO L231 Difference]: Finished difference. Result has 129 places, 152 transitions, 814 flow [2023-11-29 00:35:53,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=814, PETRI_PLACES=129, PETRI_TRANSITIONS=152} [2023-11-29 00:35:53,350 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 23 predicate places. [2023-11-29 00:35:53,350 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 152 transitions, 814 flow [2023-11-29 00:35:53,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:35:53,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:35:53,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:53,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:53,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:35:53,552 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:35:53,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:53,552 INFO L85 PathProgramCache]: Analyzing trace with hash -4100271, now seen corresponding path program 1 times [2023-11-29 00:35:53,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:35:53,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478475949] [2023-11-29 00:35:53,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:53,553 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 [2023-11-29 00:35:53,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:35:53,554 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:35:53,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:35:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:53,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 00:35:53,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:53,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 00:35:53,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:35:53,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:35:53,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:53,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:53,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:53,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:53,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:53,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:53,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:53,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:53,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:35:53,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:53,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:53,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:53,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:53,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:53,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:53,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:53,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:53,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:53,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:53,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:53,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:35:53,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:53,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:53,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:53,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:53,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:35:53,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:53,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:53,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:53,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:53,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:53,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:54,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:54,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:54,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:35:54,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:54,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:54,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:54,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:54,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:35:54,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:54,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:54,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:54,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:54,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:54,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:35:54,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:54,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:35:54,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:35:54,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:54,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:35:54,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:35:54,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 00:35:54,288 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 00:35:54,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 00:35:54,367 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-29 00:35:54,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-11-29 00:35:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:35:54,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:35:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:35:55,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:35:55,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478475949] [2023-11-29 00:35:55,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478475949] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:35:55,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:35:55,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-11-29 00:35:55,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350528032] [2023-11-29 00:35:55,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:35:55,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 00:35:55,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:35:55,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 00:35:55,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:35:58,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:36:02,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:36:09,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:36:15,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:36:18,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 109 [2023-11-29 00:36:18,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 152 transitions, 814 flow. Second operand has 11 states, 11 states have (on average 50.0) internal successors, (550), 11 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:18,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:36:18,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 109 [2023-11-29 00:36:18,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:36:23,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:36:27,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:36:29,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:36:35,818 INFO L124 PetriNetUnfolderBase]: 21326/37002 cut-off events. [2023-11-29 00:36:35,818 INFO L125 PetriNetUnfolderBase]: For 557/573 co-relation queries the response was YES. [2023-11-29 00:36:35,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65989 conditions, 37002 events. 21326/37002 cut-off events. For 557/573 co-relation queries the response was YES. Maximal size of possible extension queue 2086. Compared 347964 event pairs, 15224 based on Foata normal form. 3/25263 useless extension candidates. Maximal degree in co-relation 65947. Up to 13956 conditions per place. [2023-11-29 00:36:36,089 INFO L140 encePairwiseOnDemand]: 96/109 looper letters, 146 selfloop transitions, 72 changer transitions 0/258 dead transitions. [2023-11-29 00:36:36,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 258 transitions, 1670 flow [2023-11-29 00:36:36,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 00:36:36,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 00:36:36,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 956 transitions. [2023-11-29 00:36:36,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481651376146789 [2023-11-29 00:36:36,095 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 956 transitions. [2023-11-29 00:36:36,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 956 transitions. [2023-11-29 00:36:36,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:36:36,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 956 transitions. [2023-11-29 00:36:36,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 59.75) internal successors, (956), 16 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:36,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 109.0) internal successors, (1853), 17 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:36,101 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 109.0) internal successors, (1853), 17 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:36,101 INFO L175 Difference]: Start difference. First operand has 129 places, 152 transitions, 814 flow. Second operand 16 states and 956 transitions. [2023-11-29 00:36:36,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 258 transitions, 1670 flow [2023-11-29 00:36:36,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 258 transitions, 1643 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:36:36,110 INFO L231 Difference]: Finished difference. Result has 147 places, 173 transitions, 1222 flow [2023-11-29 00:36:36,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1222, PETRI_PLACES=147, PETRI_TRANSITIONS=173} [2023-11-29 00:36:36,111 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 41 predicate places. [2023-11-29 00:36:36,111 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 173 transitions, 1222 flow [2023-11-29 00:36:36,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 50.0) internal successors, (550), 11 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:36,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:36:36,111 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-29 00:36:36,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 00:36:36,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:36:36,312 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:36:36,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:36:36,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1989319044, now seen corresponding path program 2 times [2023-11-29 00:36:36,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:36:36,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322059265] [2023-11-29 00:36:36,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:36:36,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:36:36,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:36:36,314 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:36:36,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:36:36,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:36:36,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:36:36,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 00:36:36,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:36:36,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 00:36:36,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:36,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:36:36,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:36:36,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:36:36,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:36,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:36,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:36:36,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:36,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:36:36,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:36,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:36:36,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:36:36,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:36,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:36:36,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:36,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:36,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:36:36,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:36,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:36:36,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:36,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:36:36,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:36:36,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:36:36,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:36:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:36:37,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:36:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:36:38,065 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:36:38,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322059265] [2023-11-29 00:36:38,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322059265] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:36:38,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:36:38,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 00:36:38,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67917146] [2023-11-29 00:36:38,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:36:38,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:36:38,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:36:38,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:36:38,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:36:42,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 109 [2023-11-29 00:36:42,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 173 transitions, 1222 flow. Second operand has 14 states, 14 states have (on average 55.57142857142857) internal successors, (778), 14 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:36:42,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:36:42,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 109 [2023-11-29 00:36:42,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:36:46,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:48,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:52,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:54,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:57,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:36:59,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:02,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:05,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:07,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:10,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:13,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:16,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:19,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:21,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:23,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:24,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:26,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:37:32,861 INFO L124 PetriNetUnfolderBase]: 21338/37037 cut-off events. [2023-11-29 00:37:32,862 INFO L125 PetriNetUnfolderBase]: For 727/743 co-relation queries the response was YES. [2023-11-29 00:37:33,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66379 conditions, 37037 events. 21338/37037 cut-off events. For 727/743 co-relation queries the response was YES. Maximal size of possible extension queue 2074. Compared 348310 event pairs, 15224 based on Foata normal form. 17/25134 useless extension candidates. Maximal degree in co-relation 66202. Up to 27948 conditions per place. [2023-11-29 00:37:33,135 INFO L140 encePairwiseOnDemand]: 96/109 looper letters, 55 selfloop transitions, 114 changer transitions 0/211 dead transitions. [2023-11-29 00:37:33,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 211 transitions, 2017 flow [2023-11-29 00:37:33,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 00:37:33,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 00:37:33,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1251 transitions. [2023-11-29 00:37:33,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546526867627785 [2023-11-29 00:37:33,142 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1251 transitions. [2023-11-29 00:37:33,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1251 transitions. [2023-11-29 00:37:33,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:37:33,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1251 transitions. [2023-11-29 00:37:33,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 59.57142857142857) internal successors, (1251), 21 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:33,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 109.0) internal successors, (2398), 22 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:33,154 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 109.0) internal successors, (2398), 22 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:33,154 INFO L175 Difference]: Start difference. First operand has 147 places, 173 transitions, 1222 flow. Second operand 21 states and 1251 transitions. [2023-11-29 00:37:33,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 211 transitions, 2017 flow [2023-11-29 00:37:33,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 211 transitions, 2000 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-29 00:37:33,168 INFO L231 Difference]: Finished difference. Result has 170 places, 211 transitions, 2018 flow [2023-11-29 00:37:33,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2018, PETRI_PLACES=170, PETRI_TRANSITIONS=211} [2023-11-29 00:37:33,169 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 64 predicate places. [2023-11-29 00:37:33,169 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 211 transitions, 2018 flow [2023-11-29 00:37:33,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 55.57142857142857) internal successors, (778), 14 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:33,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:37:33,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:37:33,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-29 00:37:33,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:37:33,373 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:37:33,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:37:33,374 INFO L85 PathProgramCache]: Analyzing trace with hash -127107476, now seen corresponding path program 1 times [2023-11-29 00:37:33,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:37:33,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445598111] [2023-11-29 00:37:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:33,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:37:33,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:37:33,380 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:37:33,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:37:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:33,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:37:33,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:37:33,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:37:33,647 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 00:37:33,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 00:37:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:37:33,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:37:33,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:37:33,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445598111] [2023-11-29 00:37:33,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445598111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:37:33,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:37:33,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:37:33,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031231371] [2023-11-29 00:37:33,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:37:33,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:37:33,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:37:33,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:37:33,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:37:33,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 109 [2023-11-29 00:37:33,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 211 transitions, 2018 flow. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:33,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:37:33,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 109 [2023-11-29 00:37:33,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:37:38,440 INFO L124 PetriNetUnfolderBase]: 21314/36693 cut-off events. [2023-11-29 00:37:38,440 INFO L125 PetriNetUnfolderBase]: For 739/755 co-relation queries the response was YES. [2023-11-29 00:37:38,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66294 conditions, 36693 events. 21314/36693 cut-off events. For 739/755 co-relation queries the response was YES. Maximal size of possible extension queue 1994. Compared 334670 event pairs, 15408 based on Foata normal form. 0/25837 useless extension candidates. Maximal degree in co-relation 66085. Up to 27975 conditions per place. [2023-11-29 00:37:38,774 INFO L140 encePairwiseOnDemand]: 101/109 looper letters, 136 selfloop transitions, 30 changer transitions 0/206 dead transitions. [2023-11-29 00:37:38,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 206 transitions, 2340 flow [2023-11-29 00:37:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:37:38,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:37:38,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 297 transitions. [2023-11-29 00:37:38,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544954128440367 [2023-11-29 00:37:38,777 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 297 transitions. [2023-11-29 00:37:38,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 297 transitions. [2023-11-29 00:37:38,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:37:38,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 297 transitions. [2023-11-29 00:37:38,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 59.4) internal successors, (297), 5 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:38,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:38,780 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:38,780 INFO L175 Difference]: Start difference. First operand has 170 places, 211 transitions, 2018 flow. Second operand 5 states and 297 transitions. [2023-11-29 00:37:38,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 206 transitions, 2340 flow [2023-11-29 00:37:38,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 206 transitions, 2233 flow, removed 47 selfloop flow, removed 4 redundant places. [2023-11-29 00:37:38,793 INFO L231 Difference]: Finished difference. Result has 165 places, 206 transitions, 1961 flow [2023-11-29 00:37:38,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=1901, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1961, PETRI_PLACES=165, PETRI_TRANSITIONS=206} [2023-11-29 00:37:38,794 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 59 predicate places. [2023-11-29 00:37:38,794 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 206 transitions, 1961 flow [2023-11-29 00:37:38,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:38,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:37:38,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:37:38,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 00:37:38,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:37:38,995 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:37:38,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:37:38,996 INFO L85 PathProgramCache]: Analyzing trace with hash -127107475, now seen corresponding path program 1 times [2023-11-29 00:37:38,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:37:38,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974039742] [2023-11-29 00:37:38,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:38,996 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 [2023-11-29 00:37:38,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:37:38,997 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:37:38,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:37:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:39,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 00:37:39,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:37:39,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:37:39,277 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-29 00:37:39,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-11-29 00:37:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:37:39,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:37:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:37:39,816 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:37:39,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974039742] [2023-11-29 00:37:39,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974039742] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:37:39,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:37:39,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-11-29 00:37:39,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681637740] [2023-11-29 00:37:39,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:37:39,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 00:37:39,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:37:39,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 00:37:39,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:37:42,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 109 [2023-11-29 00:37:42,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 206 transitions, 1961 flow. Second operand has 11 states, 11 states have (on average 57.18181818181818) internal successors, (629), 11 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:42,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:37:42,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 109 [2023-11-29 00:37:42,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:37:47,216 INFO L124 PetriNetUnfolderBase]: 14246/24712 cut-off events. [2023-11-29 00:37:47,216 INFO L125 PetriNetUnfolderBase]: For 594/606 co-relation queries the response was YES. [2023-11-29 00:37:47,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44597 conditions, 24712 events. 14246/24712 cut-off events. For 594/606 co-relation queries the response was YES. Maximal size of possible extension queue 1155. Compared 215448 event pairs, 10092 based on Foata normal form. 4/17197 useless extension candidates. Maximal degree in co-relation 44533. Up to 15545 conditions per place. [2023-11-29 00:37:47,395 INFO L140 encePairwiseOnDemand]: 99/109 looper letters, 137 selfloop transitions, 49 changer transitions 0/225 dead transitions. [2023-11-29 00:37:47,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 225 transitions, 2186 flow [2023-11-29 00:37:47,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 00:37:47,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 00:37:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 993 transitions. [2023-11-29 00:37:47,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5693807339449541 [2023-11-29 00:37:47,401 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 993 transitions. [2023-11-29 00:37:47,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 993 transitions. [2023-11-29 00:37:47,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:37:47,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 993 transitions. [2023-11-29 00:37:47,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 62.0625) internal successors, (993), 16 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:47,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 109.0) internal successors, (1853), 17 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:47,408 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 109.0) internal successors, (1853), 17 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:47,408 INFO L175 Difference]: Start difference. First operand has 165 places, 206 transitions, 1961 flow. Second operand 16 states and 993 transitions. [2023-11-29 00:37:47,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 225 transitions, 2186 flow [2023-11-29 00:37:47,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 225 transitions, 2131 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-11-29 00:37:47,425 INFO L231 Difference]: Finished difference. Result has 171 places, 186 transitions, 1749 flow [2023-11-29 00:37:47,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1749, PETRI_PLACES=171, PETRI_TRANSITIONS=186} [2023-11-29 00:37:47,426 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 65 predicate places. [2023-11-29 00:37:47,427 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 186 transitions, 1749 flow [2023-11-29 00:37:47,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 57.18181818181818) internal successors, (629), 11 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:47,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:37:47,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:37:47,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-11-29 00:37:47,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:37:47,631 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:37:47,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:37:47,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1503335787, now seen corresponding path program 1 times [2023-11-29 00:37:47,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:37:47,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20548720] [2023-11-29 00:37:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:47,632 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 [2023-11-29 00:37:47,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:37:47,633 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:37:47,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:37:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:47,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:37:47,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:37:48,035 INFO L349 Elim1Store]: treesize reduction 99, result has 18.9 percent of original size [2023-11-29 00:37:48,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 41 [2023-11-29 00:37:48,086 INFO L349 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2023-11-29 00:37:48,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 1 [2023-11-29 00:37:48,266 INFO L349 Elim1Store]: treesize reduction 28, result has 54.1 percent of original size [2023-11-29 00:37:48,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 57 [2023-11-29 00:37:48,543 INFO L349 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2023-11-29 00:37:48,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 71 [2023-11-29 00:37:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:37:50,766 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:37:50,767 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:37:50,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20548720] [2023-11-29 00:37:50,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20548720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:37:50,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:37:50,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:37:50,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883864055] [2023-11-29 00:37:50,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:37:50,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:37:50,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:37:50,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:37:50,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:37:52,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 109 [2023-11-29 00:37:52,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 186 transitions, 1749 flow. Second operand has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:52,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:37:52,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 109 [2023-11-29 00:37:52,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:37:56,230 INFO L124 PetriNetUnfolderBase]: 17726/30124 cut-off events. [2023-11-29 00:37:56,230 INFO L125 PetriNetUnfolderBase]: For 622/634 co-relation queries the response was YES. [2023-11-29 00:37:56,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54811 conditions, 30124 events. 17726/30124 cut-off events. For 622/634 co-relation queries the response was YES. Maximal size of possible extension queue 1253. Compared 252813 event pairs, 13020 based on Foata normal form. 2598/24328 useless extension candidates. Maximal degree in co-relation 54749. Up to 23415 conditions per place. [2023-11-29 00:37:56,429 INFO L140 encePairwiseOnDemand]: 106/109 looper letters, 149 selfloop transitions, 1 changer transitions 0/184 dead transitions. [2023-11-29 00:37:56,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 184 transitions, 2045 flow [2023-11-29 00:37:56,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:37:56,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:37:56,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 207 transitions. [2023-11-29 00:37:56,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6330275229357798 [2023-11-29 00:37:56,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 207 transitions. [2023-11-29 00:37:56,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 207 transitions. [2023-11-29 00:37:56,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:37:56,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 207 transitions. [2023-11-29 00:37:56,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:56,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:56,433 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:56,433 INFO L175 Difference]: Start difference. First operand has 171 places, 186 transitions, 1749 flow. Second operand 3 states and 207 transitions. [2023-11-29 00:37:56,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 184 transitions, 2045 flow [2023-11-29 00:37:56,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 184 transitions, 2028 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 00:37:56,442 INFO L231 Difference]: Finished difference. Result has 166 places, 184 transitions, 1730 flow [2023-11-29 00:37:56,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1730, PETRI_PLACES=166, PETRI_TRANSITIONS=184} [2023-11-29 00:37:56,443 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 60 predicate places. [2023-11-29 00:37:56,443 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 184 transitions, 1730 flow [2023-11-29 00:37:56,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:56,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:37:56,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:37:56,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-29 00:37:56,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:37:56,644 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:37:56,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:37:56,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1503335788, now seen corresponding path program 1 times [2023-11-29 00:37:56,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:37:56,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45116218] [2023-11-29 00:37:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:56,645 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 [2023-11-29 00:37:56,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:37:56,646 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:37:56,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:37:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:56,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 00:37:56,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:37:56,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-29 00:37:56,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-29 00:37:56,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:56,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:56,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 00:37:56,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:56,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:56,927 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:37:56,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:56,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:56,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 00:37:56,967 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:37:56,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:56,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:56,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:57,032 INFO L349 Elim1Store]: treesize reduction 19, result has 13.6 percent of original size [2023-11-29 00:37:57,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 11 [2023-11-29 00:37:57,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:57,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:57,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:57,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:37:57,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:57,094 INFO L349 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2023-11-29 00:37:57,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:37:57,119 INFO L349 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2023-11-29 00:37:57,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:37:57,318 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2023-11-29 00:37:57,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2023-11-29 00:37:57,499 INFO L349 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2023-11-29 00:37:57,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 36 [2023-11-29 00:37:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:37:57,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:37:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:37:59,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:37:59,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45116218] [2023-11-29 00:37:59,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45116218] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:37:59,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:37:59,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2023-11-29 00:37:59,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245600837] [2023-11-29 00:37:59,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:37:59,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:37:59,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:37:59,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:37:59,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:38:07,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 109 [2023-11-29 00:38:07,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 184 transitions, 1730 flow. Second operand has 13 states, 13 states have (on average 49.30769230769231) internal successors, (641), 13 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:38:07,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:38:07,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 109 [2023-11-29 00:38:07,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:38:17,738 INFO L124 PetriNetUnfolderBase]: 21686/34404 cut-off events. [2023-11-29 00:38:17,738 INFO L125 PetriNetUnfolderBase]: For 423/423 co-relation queries the response was YES. [2023-11-29 00:38:17,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63845 conditions, 34404 events. 21686/34404 cut-off events. For 423/423 co-relation queries the response was YES. Maximal size of possible extension queue 1495. Compared 280685 event pairs, 15942 based on Foata normal form. 0/24167 useless extension candidates. Maximal degree in co-relation 63810. Up to 23457 conditions per place. [2023-11-29 00:38:17,996 INFO L140 encePairwiseOnDemand]: 95/109 looper letters, 117 selfloop transitions, 88 changer transitions 0/233 dead transitions. [2023-11-29 00:38:17,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 233 transitions, 2310 flow [2023-11-29 00:38:17,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 00:38:17,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 00:38:18,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 982 transitions. [2023-11-29 00:38:18,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5005096839959225 [2023-11-29 00:38:18,001 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 982 transitions. [2023-11-29 00:38:18,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 982 transitions. [2023-11-29 00:38:18,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:38:18,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 982 transitions. [2023-11-29 00:38:18,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 54.55555555555556) internal successors, (982), 18 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:38:18,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 109.0) internal successors, (2071), 19 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:38:18,007 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 109.0) internal successors, (2071), 19 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:38:18,007 INFO L175 Difference]: Start difference. First operand has 166 places, 184 transitions, 1730 flow. Second operand 18 states and 982 transitions. [2023-11-29 00:38:18,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 233 transitions, 2310 flow [2023-11-29 00:38:18,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 233 transitions, 2309 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:38:18,017 INFO L231 Difference]: Finished difference. Result has 185 places, 186 transitions, 1974 flow [2023-11-29 00:38:18,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=1727, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1974, PETRI_PLACES=185, PETRI_TRANSITIONS=186} [2023-11-29 00:38:18,018 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 79 predicate places. [2023-11-29 00:38:18,018 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 186 transitions, 1974 flow [2023-11-29 00:38:18,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 49.30769230769231) internal successors, (641), 13 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:38:18,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:38:18,018 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 2, 2, 1, 1, 1] [2023-11-29 00:38:18,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:38:18,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:38:18,219 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:38:18,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:38:18,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1888853970, now seen corresponding path program 2 times [2023-11-29 00:38:18,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:38:18,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538043722] [2023-11-29 00:38:18,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:38:18,220 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 [2023-11-29 00:38:18,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:38:18,221 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:38:18,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:38:18,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:38:18,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:38:18,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 00:38:18,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:38:18,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:38:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:38:18,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:38:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:38:19,998 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:38:19,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538043722] [2023-11-29 00:38:19,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538043722] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:38:19,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:38:19,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2023-11-29 00:38:19,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477530972] [2023-11-29 00:38:19,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:38:19,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:38:19,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:38:19,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:38:20,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:38:29,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 109 [2023-11-29 00:38:29,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 186 transitions, 1974 flow. Second operand has 19 states, 19 states have (on average 55.68421052631579) internal successors, (1058), 19 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:38:29,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:38:29,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 109 [2023-11-29 00:38:29,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:38:35,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:38:41,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:38:44,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:38:47,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:38:49,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:38:53,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:38:56,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:38:59,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:39:04,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:39:06,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:39:07,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:39:13,591 INFO L124 PetriNetUnfolderBase]: 21357/36005 cut-off events. [2023-11-29 00:39:13,591 INFO L125 PetriNetUnfolderBase]: For 967/979 co-relation queries the response was YES. [2023-11-29 00:39:13,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65742 conditions, 36005 events. 21357/36005 cut-off events. For 967/979 co-relation queries the response was YES. Maximal size of possible extension queue 1597. Compared 318103 event pairs, 15138 based on Foata normal form. 4/25647 useless extension candidates. Maximal degree in co-relation 65702. Up to 18648 conditions per place. [2023-11-29 00:39:13,918 INFO L140 encePairwiseOnDemand]: 98/109 looper letters, 83 selfloop transitions, 126 changer transitions 0/243 dead transitions. [2023-11-29 00:39:13,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 243 transitions, 2804 flow [2023-11-29 00:39:13,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 00:39:13,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 00:39:13,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1710 transitions. [2023-11-29 00:39:13,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409680480860487 [2023-11-29 00:39:13,922 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1710 transitions. [2023-11-29 00:39:13,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1710 transitions. [2023-11-29 00:39:13,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:13,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1710 transitions. [2023-11-29 00:39:13,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 58.96551724137931) internal successors, (1710), 29 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:13,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 109.0) internal successors, (3270), 30 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:13,932 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 109.0) internal successors, (3270), 30 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:13,932 INFO L175 Difference]: Start difference. First operand has 185 places, 186 transitions, 1974 flow. Second operand 29 states and 1710 transitions. [2023-11-29 00:39:13,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 243 transitions, 2804 flow [2023-11-29 00:39:13,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 243 transitions, 2715 flow, removed 13 selfloop flow, removed 7 redundant places. [2023-11-29 00:39:13,951 INFO L231 Difference]: Finished difference. Result has 208 places, 206 transitions, 2500 flow [2023-11-29 00:39:13,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=1899, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2500, PETRI_PLACES=208, PETRI_TRANSITIONS=206} [2023-11-29 00:39:13,952 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 102 predicate places. [2023-11-29 00:39:13,952 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 206 transitions, 2500 flow [2023-11-29 00:39:13,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.68421052631579) internal successors, (1058), 19 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:13,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:13,953 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:13,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:39:14,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:39:14,154 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:39:14,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:14,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1919418284, now seen corresponding path program 2 times [2023-11-29 00:39:14,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:39:14,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291251672] [2023-11-29 00:39:14,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:39:14,155 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 [2023-11-29 00:39:14,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:39:14,156 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:39:14,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:39:14,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 00:39:14,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:39:14,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 00:39:14,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:39:14,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:39:14,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:39:14,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:14,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:14,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:39:14,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:39:14,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:39:14,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:14,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:39:14,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:39:14,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:14,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:14,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:39:14,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:39:14,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:39:14,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:14,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:39:14,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:39:14,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:14,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:14,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:39:14,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:39:14,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:39:14,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:14,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:39:14,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 00:39:14,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:14,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:39:14,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:39:14,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 00:39:14,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:14,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 00:39:14,821 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 00:39:14,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 00:39:14,899 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-29 00:39:14,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-11-29 00:39:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 00:39:14,996 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:39:14,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:39:14,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291251672] [2023-11-29 00:39:14,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291251672] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:14,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:14,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:39:14,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797496436] [2023-11-29 00:39:14,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:14,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:39:14,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:39:14,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:39:14,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:39:15,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 109 [2023-11-29 00:39:15,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 206 transitions, 2500 flow. Second operand has 5 states, 5 states have (on average 54.2) internal successors, (271), 5 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:15,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:15,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 109 [2023-11-29 00:39:15,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:20,280 INFO L124 PetriNetUnfolderBase]: 21357/36002 cut-off events. [2023-11-29 00:39:20,280 INFO L125 PetriNetUnfolderBase]: For 987/1005 co-relation queries the response was YES. [2023-11-29 00:39:20,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65819 conditions, 36002 events. 21357/36002 cut-off events. For 987/1005 co-relation queries the response was YES. Maximal size of possible extension queue 1651. Compared 319193 event pairs, 15138 based on Foata normal form. 3/25565 useless extension candidates. Maximal degree in co-relation 65777. Up to 27973 conditions per place. [2023-11-29 00:39:20,609 INFO L140 encePairwiseOnDemand]: 105/109 looper letters, 142 selfloop transitions, 27 changer transitions 0/205 dead transitions. [2023-11-29 00:39:20,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 205 transitions, 2832 flow [2023-11-29 00:39:20,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:39:20,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:39:20,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 307 transitions. [2023-11-29 00:39:20,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563302752293578 [2023-11-29 00:39:20,612 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 307 transitions. [2023-11-29 00:39:20,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 307 transitions. [2023-11-29 00:39:20,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:20,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 307 transitions. [2023-11-29 00:39:20,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 61.4) internal successors, (307), 5 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:20,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:20,615 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:20,615 INFO L175 Difference]: Start difference. First operand has 208 places, 206 transitions, 2500 flow. Second operand 5 states and 307 transitions. [2023-11-29 00:39:20,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 205 transitions, 2832 flow [2023-11-29 00:39:20,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 205 transitions, 2607 flow, removed 24 selfloop flow, removed 14 redundant places. [2023-11-29 00:39:20,631 INFO L231 Difference]: Finished difference. Result has 197 places, 205 transitions, 2323 flow [2023-11-29 00:39:20,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2323, PETRI_PLACES=197, PETRI_TRANSITIONS=205} [2023-11-29 00:39:20,631 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 91 predicate places. [2023-11-29 00:39:20,631 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 205 transitions, 2323 flow [2023-11-29 00:39:20,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.2) internal successors, (271), 5 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:20,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:20,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:20,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 00:39:20,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:39:20,832 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:39:20,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:20,833 INFO L85 PathProgramCache]: Analyzing trace with hash -2041558920, now seen corresponding path program 1 times [2023-11-29 00:39:20,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:39:20,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56386802] [2023-11-29 00:39:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:20,833 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 [2023-11-29 00:39:20,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:39:20,834 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:39:20,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:39:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:21,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:39:21,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:39:21,043 INFO L349 Elim1Store]: treesize reduction 35, result has 23.9 percent of original size [2023-11-29 00:39:21,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 19 [2023-11-29 00:39:21,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:21,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:21,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-29 00:39:21,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:21,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:21,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 00:39:21,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:21,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:21,098 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:39:21,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 00:39:21,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:21,125 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:39:21,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-29 00:39:21,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:21,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:21,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 00:39:21,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:21,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:21,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:21,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-11-29 00:39:21,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:21,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:21,200 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 00:39:21,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-29 00:39:21,239 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2023-11-29 00:39:21,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2023-11-29 00:39:21,306 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-11-29 00:39:21,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2023-11-29 00:39:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:39:21,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:39:21,579 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:39:21,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56386802] [2023-11-29 00:39:21,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56386802] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:21,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:21,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:39:21,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34116727] [2023-11-29 00:39:21,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:21,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:39:21,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:39:21,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:39:21,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:39:22,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 109 [2023-11-29 00:39:22,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 205 transitions, 2323 flow. Second operand has 7 states, 7 states have (on average 52.42857142857143) internal successors, (367), 7 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:22,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:22,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 109 [2023-11-29 00:39:22,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:27,668 INFO L124 PetriNetUnfolderBase]: 24540/41186 cut-off events. [2023-11-29 00:39:27,668 INFO L125 PetriNetUnfolderBase]: For 940/940 co-relation queries the response was YES. [2023-11-29 00:39:27,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75427 conditions, 41186 events. 24540/41186 cut-off events. For 940/940 co-relation queries the response was YES. Maximal size of possible extension queue 1601. Compared 351758 event pairs, 18080 based on Foata normal form. 0/30194 useless extension candidates. Maximal degree in co-relation 75387. Up to 32514 conditions per place. [2023-11-29 00:39:28,043 INFO L140 encePairwiseOnDemand]: 106/109 looper letters, 173 selfloop transitions, 1 changer transitions 0/203 dead transitions. [2023-11-29 00:39:28,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 203 transitions, 2667 flow [2023-11-29 00:39:28,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:39:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:39:28,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 203 transitions. [2023-11-29 00:39:28,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6207951070336392 [2023-11-29 00:39:28,046 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 203 transitions. [2023-11-29 00:39:28,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 203 transitions. [2023-11-29 00:39:28,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:28,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 203 transitions. [2023-11-29 00:39:28,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:28,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:28,048 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:28,048 INFO L175 Difference]: Start difference. First operand has 197 places, 205 transitions, 2323 flow. Second operand 3 states and 203 transitions. [2023-11-29 00:39:28,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 203 transitions, 2667 flow [2023-11-29 00:39:28,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 203 transitions, 2629 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:39:28,070 INFO L231 Difference]: Finished difference. Result has 194 places, 203 transitions, 2283 flow [2023-11-29 00:39:28,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=2281, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2283, PETRI_PLACES=194, PETRI_TRANSITIONS=203} [2023-11-29 00:39:28,071 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 88 predicate places. [2023-11-29 00:39:28,071 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 203 transitions, 2283 flow [2023-11-29 00:39:28,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 52.42857142857143) internal successors, (367), 7 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:28,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:28,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:28,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-11-29 00:39:28,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:39:28,272 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:39:28,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:28,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2041558919, now seen corresponding path program 1 times [2023-11-29 00:39:28,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:39:28,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457918789] [2023-11-29 00:39:28,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:28,273 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 [2023-11-29 00:39:28,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:39:28,274 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:39:28,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:39:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:28,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 00:39:28,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:39:28,523 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 00:39:28,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2023-11-29 00:39:28,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:28,601 INFO L349 Elim1Store]: treesize reduction 19, result has 13.6 percent of original size [2023-11-29 00:39:28,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 00:39:28,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:28,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:28,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 00:39:28,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:28,720 INFO L349 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2023-11-29 00:39:28,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 00:39:28,748 INFO L349 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2023-11-29 00:39:28,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:39:28,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:28,800 INFO L349 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2023-11-29 00:39:28,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:39:28,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:39:28,845 INFO L349 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2023-11-29 00:39:28,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:39:28,872 INFO L349 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2023-11-29 00:39:28,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:39:29,163 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2023-11-29 00:39:29,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2023-11-29 00:39:29,332 INFO L349 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2023-11-29 00:39:29,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 36 [2023-11-29 00:39:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:39:29,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:39:31,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:39:31,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:39:31,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457918789] [2023-11-29 00:39:31,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457918789] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:39:31,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:39:31,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2023-11-29 00:39:31,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323428424] [2023-11-29 00:39:31,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:39:31,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:39:31,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:39:31,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:39:31,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:39:37,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:39:41,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 109 [2023-11-29 00:39:41,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 203 transitions, 2283 flow. Second operand has 13 states, 13 states have (on average 48.61538461538461) internal successors, (632), 13 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:41,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:41,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 109 [2023-11-29 00:39:41,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:52,484 INFO L124 PetriNetUnfolderBase]: 20935/34623 cut-off events. [2023-11-29 00:39:52,484 INFO L125 PetriNetUnfolderBase]: For 887/887 co-relation queries the response was YES. [2023-11-29 00:39:52,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63995 conditions, 34623 events. 20935/34623 cut-off events. For 887/887 co-relation queries the response was YES. Maximal size of possible extension queue 1495. Compared 296482 event pairs, 14936 based on Foata normal form. 0/25163 useless extension candidates. Maximal degree in co-relation 63955. Up to 24067 conditions per place. [2023-11-29 00:39:52,776 INFO L140 encePairwiseOnDemand]: 95/109 looper letters, 135 selfloop transitions, 102 changer transitions 0/262 dead transitions. [2023-11-29 00:39:52,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 262 transitions, 2939 flow [2023-11-29 00:39:52,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 00:39:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 00:39:52,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 976 transitions. [2023-11-29 00:39:52,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49745158002038736 [2023-11-29 00:39:52,780 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 976 transitions. [2023-11-29 00:39:52,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 976 transitions. [2023-11-29 00:39:52,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:52,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 976 transitions. [2023-11-29 00:39:52,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 54.22222222222222) internal successors, (976), 18 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 109.0) internal successors, (2071), 19 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,786 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 109.0) internal successors, (2071), 19 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,786 INFO L175 Difference]: Start difference. First operand has 194 places, 203 transitions, 2283 flow. Second operand 18 states and 976 transitions. [2023-11-29 00:39:52,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 262 transitions, 2939 flow [2023-11-29 00:39:52,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 262 transitions, 2938 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:39:52,807 INFO L231 Difference]: Finished difference. Result has 212 places, 203 transitions, 2522 flow [2023-11-29 00:39:52,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=2280, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2522, PETRI_PLACES=212, PETRI_TRANSITIONS=203} [2023-11-29 00:39:52,808 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 106 predicate places. [2023-11-29 00:39:52,808 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 203 transitions, 2522 flow [2023-11-29 00:39:52,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 48.61538461538461) internal successors, (632), 13 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:52,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:52,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-11-29 00:39:53,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:39:53,009 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:39:53,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:53,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1136287743, now seen corresponding path program 1 times [2023-11-29 00:39:53,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:39:53,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940423955] [2023-11-29 00:39:53,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:53,010 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 [2023-11-29 00:39:53,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:39:53,011 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:39:53,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:39:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:53,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:39:53,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:39:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:39:53,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:39:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:39:53,379 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:39:53,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940423955] [2023-11-29 00:39:53,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940423955] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:39:53,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:39:53,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-29 00:39:53,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680251538] [2023-11-29 00:39:53,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:39:53,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:39:53,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:39:53,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:39:53,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:39:53,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 109 [2023-11-29 00:39:53,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 203 transitions, 2522 flow. Second operand has 10 states, 10 states have (on average 59.2) internal successors, (592), 10 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:53,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:53,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 109 [2023-11-29 00:39:53,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:58,927 INFO L124 PetriNetUnfolderBase]: 18615/31650 cut-off events. [2023-11-29 00:39:58,927 INFO L125 PetriNetUnfolderBase]: For 1076/1094 co-relation queries the response was YES. [2023-11-29 00:39:59,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58153 conditions, 31650 events. 18615/31650 cut-off events. For 1076/1094 co-relation queries the response was YES. Maximal size of possible extension queue 1501. Compared 274678 event pairs, 12750 based on Foata normal form. 0/22371 useless extension candidates. Maximal degree in co-relation 58109. Up to 21010 conditions per place. [2023-11-29 00:39:59,233 INFO L140 encePairwiseOnDemand]: 96/109 looper letters, 166 selfloop transitions, 104 changer transitions 0/303 dead transitions. [2023-11-29 00:39:59,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 303 transitions, 3325 flow [2023-11-29 00:39:59,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:39:59,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 00:39:59,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 839 transitions. [2023-11-29 00:39:59,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6414373088685015 [2023-11-29 00:39:59,236 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 839 transitions. [2023-11-29 00:39:59,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 839 transitions. [2023-11-29 00:39:59,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:59,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 839 transitions. [2023-11-29 00:39:59,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 69.91666666666667) internal successors, (839), 12 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:59,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 109.0) internal successors, (1417), 13 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:59,240 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 109.0) internal successors, (1417), 13 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:59,240 INFO L175 Difference]: Start difference. First operand has 212 places, 203 transitions, 2522 flow. Second operand 12 states and 839 transitions. [2023-11-29 00:39:59,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 303 transitions, 3325 flow [2023-11-29 00:39:59,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 303 transitions, 3150 flow, removed 0 selfloop flow, removed 14 redundant places. [2023-11-29 00:39:59,255 INFO L231 Difference]: Finished difference. Result has 211 places, 207 transitions, 2576 flow [2023-11-29 00:39:59,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=2348, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2576, PETRI_PLACES=211, PETRI_TRANSITIONS=207} [2023-11-29 00:39:59,256 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 105 predicate places. [2023-11-29 00:39:59,256 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 207 transitions, 2576 flow [2023-11-29 00:39:59,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 59.2) internal successors, (592), 10 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:59,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:59,256 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 3, 3, 1, 1, 1] [2023-11-29 00:39:59,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-11-29 00:39:59,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:39:59,458 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:39:59,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:59,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1298983367, now seen corresponding path program 3 times [2023-11-29 00:39:59,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:39:59,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610219397] [2023-11-29 00:39:59,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:39:59,461 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 [2023-11-29 00:39:59,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:39:59,464 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:39:59,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:39:59,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 00:39:59,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:39:59,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 00:39:59,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:39:59,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 00:40:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:40:00,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:40:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:40:02,100 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:40:02,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610219397] [2023-11-29 00:40:02,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610219397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:40:02,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:40:02,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2023-11-29 00:40:02,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987439642] [2023-11-29 00:40:02,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:40:02,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 00:40:02,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:40:02,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 00:40:02,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-11-29 00:40:14,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 109 [2023-11-29 00:40:14,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 207 transitions, 2576 flow. Second operand has 20 states, 20 states have (on average 55.95) internal successors, (1119), 20 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:14,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:40:14,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 109 [2023-11-29 00:40:14,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:40:19,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:40:22,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:40:25,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:40:27,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 00:40:34,390 INFO L124 PetriNetUnfolderBase]: 14548/25077 cut-off events. [2023-11-29 00:40:34,390 INFO L125 PetriNetUnfolderBase]: For 3469/3539 co-relation queries the response was YES. [2023-11-29 00:40:34,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48738 conditions, 25077 events. 14548/25077 cut-off events. For 3469/3539 co-relation queries the response was YES. Maximal size of possible extension queue 1154. Compared 209543 event pairs, 10680 based on Foata normal form. 5/18105 useless extension candidates. Maximal degree in co-relation 48691. Up to 16253 conditions per place. [2023-11-29 00:40:34,603 INFO L140 encePairwiseOnDemand]: 97/109 looper letters, 120 selfloop transitions, 112 changer transitions 3/266 dead transitions. [2023-11-29 00:40:34,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 266 transitions, 3593 flow [2023-11-29 00:40:34,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 00:40:34,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 00:40:34,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1654 transitions. [2023-11-29 00:40:34,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5620115528372409 [2023-11-29 00:40:34,607 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1654 transitions. [2023-11-29 00:40:34,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1654 transitions. [2023-11-29 00:40:34,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:40:34,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1654 transitions. [2023-11-29 00:40:34,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 61.25925925925926) internal successors, (1654), 27 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:34,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 109.0) internal successors, (3052), 28 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:34,613 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 109.0) internal successors, (3052), 28 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:34,614 INFO L175 Difference]: Start difference. First operand has 211 places, 207 transitions, 2576 flow. Second operand 27 states and 1654 transitions. [2023-11-29 00:40:34,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 266 transitions, 3593 flow [2023-11-29 00:40:34,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 266 transitions, 3395 flow, removed 8 selfloop flow, removed 8 redundant places. [2023-11-29 00:40:34,634 INFO L231 Difference]: Finished difference. Result has 232 places, 214 transitions, 2837 flow [2023-11-29 00:40:34,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2837, PETRI_PLACES=232, PETRI_TRANSITIONS=214} [2023-11-29 00:40:34,634 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 126 predicate places. [2023-11-29 00:40:34,635 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 214 transitions, 2837 flow [2023-11-29 00:40:34,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.95) internal successors, (1119), 20 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:34,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:40:34,635 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:34,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 00:40:34,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:40:34,836 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:40:34,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:34,836 INFO L85 PathProgramCache]: Analyzing trace with hash -75759545, now seen corresponding path program 2 times [2023-11-29 00:40:34,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:40:34,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732656535] [2023-11-29 00:40:34,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:40:34,837 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:40:34,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:40:34,837 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:40:34,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:40:34,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 00:40:34,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:40:34,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 00:40:34,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:34,985 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 00:40:34,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2023-11-29 00:40:35,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-29 00:40:35,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:35,043 INFO L349 Elim1Store]: treesize reduction 19, result has 13.6 percent of original size [2023-11-29 00:40:35,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 00:40:35,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:35,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:40:35,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:35,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:35,119 INFO L349 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2023-11-29 00:40:35,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 00:40:35,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:35,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:35,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 00:40:35,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-29 00:40:35,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-29 00:40:35,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:35,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:35,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 00:40:35,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 00:40:35,532 INFO L349 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2023-11-29 00:40:35,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 49 [2023-11-29 00:40:35,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:35,827 INFO L349 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2023-11-29 00:40:35,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 59 [2023-11-29 00:40:35,853 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 00:40:35,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 00:40:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 00:40:38,142 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:40:38,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:40:38,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732656535] [2023-11-29 00:40:38,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732656535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:40:38,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:40:38,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:40:38,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887451570] [2023-11-29 00:40:38,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:40:38,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:40:38,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:40:38,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:40:38,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:40:39,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 109 [2023-11-29 00:40:39,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 214 transitions, 2837 flow. Second operand has 5 states, 5 states have (on average 54.8) internal successors, (274), 5 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:39,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:40:39,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 109 [2023-11-29 00:40:39,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:40:44,920 INFO L124 PetriNetUnfolderBase]: 14564/25133 cut-off events. [2023-11-29 00:40:44,920 INFO L125 PetriNetUnfolderBase]: For 3407/3493 co-relation queries the response was YES. [2023-11-29 00:40:45,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48878 conditions, 25133 events. 14564/25133 cut-off events. For 3407/3493 co-relation queries the response was YES. Maximal size of possible extension queue 1155. Compared 209837 event pairs, 10718 based on Foata normal form. 4/18128 useless extension candidates. Maximal degree in co-relation 48829. Up to 19392 conditions per place. [2023-11-29 00:40:45,121 INFO L140 encePairwiseOnDemand]: 105/109 looper letters, 148 selfloop transitions, 32 changer transitions 0/213 dead transitions. [2023-11-29 00:40:45,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 213 transitions, 3191 flow [2023-11-29 00:40:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:40:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:40:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 307 transitions. [2023-11-29 00:40:45,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563302752293578 [2023-11-29 00:40:45,124 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 307 transitions. [2023-11-29 00:40:45,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 307 transitions. [2023-11-29 00:40:45,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:40:45,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 307 transitions. [2023-11-29 00:40:45,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 61.4) internal successors, (307), 5 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:45,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:45,125 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:45,125 INFO L175 Difference]: Start difference. First operand has 232 places, 214 transitions, 2837 flow. Second operand 5 states and 307 transitions. [2023-11-29 00:40:45,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 213 transitions, 3191 flow [2023-11-29 00:40:45,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 213 transitions, 3104 flow, removed 11 selfloop flow, removed 11 redundant places. [2023-11-29 00:40:45,150 INFO L231 Difference]: Finished difference. Result has 224 places, 213 transitions, 2808 flow [2023-11-29 00:40:45,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=2744, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2808, PETRI_PLACES=224, PETRI_TRANSITIONS=213} [2023-11-29 00:40:45,150 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 118 predicate places. [2023-11-29 00:40:45,151 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 213 transitions, 2808 flow [2023-11-29 00:40:45,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.8) internal successors, (274), 5 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:45,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:40:45,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:45,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 00:40:45,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:40:45,352 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:40:45,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:45,352 INFO L85 PathProgramCache]: Analyzing trace with hash 951065961, now seen corresponding path program 1 times [2023-11-29 00:40:45,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:40:45,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781707012] [2023-11-29 00:40:45,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:45,353 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 [2023-11-29 00:40:45,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:40:45,354 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:40:45,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-29 00:40:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:45,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:40:45,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:45,578 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2023-11-29 00:40:45,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 00:40:45,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:45,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:40:45,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:45,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:40:45,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:45,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:40:45,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:45,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:40:45,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:45,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:40:45,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:45,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:40:45,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:45,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:40:45,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:45,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 00:40:45,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:45,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 00:40:45,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:45,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:40:45,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:45,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 00:40:45,744 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2023-11-29 00:40:45,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2023-11-29 00:40:45,794 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-11-29 00:40:45,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2023-11-29 00:40:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:40:46,046 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:40:46,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:40:46,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781707012] [2023-11-29 00:40:46,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781707012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:40:46,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:40:46,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:40:46,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648099593] [2023-11-29 00:40:46,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:40:46,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:40:46,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:40:46,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:40:46,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:40:46,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 109 [2023-11-29 00:40:46,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 213 transitions, 2808 flow. Second operand has 7 states, 7 states have (on average 52.714285714285715) internal successors, (369), 7 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:46,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:40:46,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 109 [2023-11-29 00:40:46,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:40:50,982 INFO L124 PetriNetUnfolderBase]: 19120/31644 cut-off events. [2023-11-29 00:40:50,983 INFO L125 PetriNetUnfolderBase]: For 3524/3604 co-relation queries the response was YES. [2023-11-29 00:40:51,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62116 conditions, 31644 events. 19120/31644 cut-off events. For 3524/3604 co-relation queries the response was YES. Maximal size of possible extension queue 1363. Compared 259656 event pairs, 14739 based on Foata normal form. 0/23848 useless extension candidates. Maximal degree in co-relation 62071. Up to 25945 conditions per place. [2023-11-29 00:40:51,292 INFO L140 encePairwiseOnDemand]: 106/109 looper letters, 184 selfloop transitions, 1 changer transitions 0/211 dead transitions. [2023-11-29 00:40:51,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 211 transitions, 3174 flow [2023-11-29 00:40:51,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:40:51,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:40:51,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 203 transitions. [2023-11-29 00:40:51,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6207951070336392 [2023-11-29 00:40:51,294 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 203 transitions. [2023-11-29 00:40:51,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 203 transitions. [2023-11-29 00:40:51,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:40:51,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 203 transitions. [2023-11-29 00:40:51,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:51,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:51,295 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:51,295 INFO L175 Difference]: Start difference. First operand has 224 places, 213 transitions, 2808 flow. Second operand 3 states and 203 transitions. [2023-11-29 00:40:51,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 211 transitions, 3174 flow [2023-11-29 00:40:51,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 211 transitions, 3131 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:40:51,320 INFO L231 Difference]: Finished difference. Result has 221 places, 211 transitions, 2763 flow [2023-11-29 00:40:51,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=2761, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2763, PETRI_PLACES=221, PETRI_TRANSITIONS=211} [2023-11-29 00:40:51,321 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 115 predicate places. [2023-11-29 00:40:51,321 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 211 transitions, 2763 flow [2023-11-29 00:40:51,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 52.714285714285715) internal successors, (369), 7 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:51,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:40:51,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:51,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-29 00:40:51,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:40:51,522 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 00:40:51,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:51,522 INFO L85 PathProgramCache]: Analyzing trace with hash 951065962, now seen corresponding path program 1 times [2023-11-29 00:40:51,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:40:51,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769488090] [2023-11-29 00:40:51,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:51,522 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 [2023-11-29 00:40:51,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:40:51,523 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:40:51,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04c852c2-5a39-4cd5-8ffb-4a0c4769f37e/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-29 00:40:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:51,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 00:40:51,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:51,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:51,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-29 00:40:51,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-29 00:40:51,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:51,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-29 00:40:51,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:51,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 00:40:51,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:51,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-29 00:40:51,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:51,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-29 00:40:51,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-29 00:40:51,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:51,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 00:40:51,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:51,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-29 00:40:51,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:51,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-29 00:40:51,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:51,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-29 00:40:51,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:51,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-29 00:40:51,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:51,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 00:40:52,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:52,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:52,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-29 00:40:52,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-29 00:40:52,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:52,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 00:40:52,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:52,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-29 00:40:52,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:52,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 00:40:52,809 INFO L349 Elim1Store]: treesize reduction 52, result has 60.9 percent of original size [2023-11-29 00:40:52,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 61 treesize of output 128