./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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_e84da741-32c3-4ea8-813a-293eaa599e55/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 d79cb5dae664e13779624ff0ffbc531b419f89e2c7510a92e890992a52ee7c98 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:38:30,942 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:38:31,013 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 04:38:31,017 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:38:31,018 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:38:31,044 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:38:31,045 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:38:31,045 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:38:31,046 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:38:31,046 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:38:31,047 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:38:31,048 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:38:31,048 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:38:31,049 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:38:31,049 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:38:31,050 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:38:31,051 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:38:31,051 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:38:31,052 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:38:31,052 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:38:31,053 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 04:38:31,054 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 04:38:31,054 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 04:38:31,054 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:38:31,055 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 04:38:31,055 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 04:38:31,056 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:38:31,056 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:38:31,057 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:38:31,057 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:38:31,058 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:38:31,058 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:38:31,058 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:38:31,058 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:38:31,059 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:38:31,059 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:38:31,059 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:38:31,059 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:38:31,060 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:38:31,060 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:38:31,060 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:38:31,060 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_e84da741-32c3-4ea8-813a-293eaa599e55/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d79cb5dae664e13779624ff0ffbc531b419f89e2c7510a92e890992a52ee7c98 [2023-11-29 04:38:31,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:38:31,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:38:31,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:38:31,300 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:38:31,301 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:38:31,302 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2023-11-29 04:38:34,021 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:38:34,180 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:38:34,181 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2023-11-29 04:38:34,189 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/data/f990e5cb4/9fe63ce4ef6b4727bffb5a97be8a20cd/FLAG2909d592c [2023-11-29 04:38:34,203 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/data/f990e5cb4/9fe63ce4ef6b4727bffb5a97be8a20cd [2023-11-29 04:38:34,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:38:34,206 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:38:34,208 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:38:34,208 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:38:34,214 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:38:34,214 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:38:34" (1/1) ... [2023-11-29 04:38:34,215 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17fc8f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:38:34, skipping insertion in model container [2023-11-29 04:38:34,216 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:38:34" (1/1) ... [2023-11-29 04:38:34,242 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:38:34,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:38:34,438 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 04:38:34,439 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@23e01e44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:38:34, skipping insertion in model container [2023-11-29 04:38:34,439 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:38:34,440 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-29 04:38:34,442 INFO L158 Benchmark]: Toolchain (without parser) took 234.63ms. Allocated memory is still 165.7MB. Free memory was 118.9MB in the beginning and 108.6MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 04:38:34,443 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 165.7MB. Free memory was 108.8MB in the beginning and 108.6MB in the end (delta: 159.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 04:38:34,444 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.26ms. Allocated memory is still 165.7MB. Free memory was 118.4MB in the beginning and 108.6MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-29 04:38:34,445 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 165.7MB. Free memory was 108.8MB in the beginning and 108.6MB in the end (delta: 159.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 232.26ms. Allocated memory is still 165.7MB. Free memory was 118.4MB in the beginning and 108.6MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 119]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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_e84da741-32c3-4ea8-813a-293eaa599e55/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 d79cb5dae664e13779624ff0ffbc531b419f89e2c7510a92e890992a52ee7c98 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:38:36,200 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:38:36,268 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 04:38:36,274 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:38:36,285 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:38:36,313 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:38:36,313 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:38:36,314 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:38:36,315 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:38:36,315 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:38:36,316 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:38:36,316 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:38:36,317 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:38:36,318 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:38:36,318 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:38:36,319 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:38:36,319 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:38:36,320 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:38:36,320 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:38:36,321 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:38:36,321 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 04:38:36,322 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 04:38:36,322 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 04:38:36,322 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:38:36,323 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 04:38:36,323 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 04:38:36,323 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 04:38:36,324 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 04:38:36,324 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:38:36,324 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:38:36,325 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:38:36,325 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:38:36,325 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:38:36,326 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:38:36,326 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:38:36,326 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:38:36,327 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:38:36,327 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 04:38:36,327 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 04:38:36,327 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:38:36,327 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:38:36,328 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:38:36,328 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:38:36,328 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 04:38:36,328 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_e84da741-32c3-4ea8-813a-293eaa599e55/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d79cb5dae664e13779624ff0ffbc531b419f89e2c7510a92e890992a52ee7c98 [2023-11-29 04:38:36,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:38:36,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:38:36,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:38:36,666 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:38:36,667 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:38:36,668 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2023-11-29 04:38:39,416 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:38:39,615 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:38:39,615 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2023-11-29 04:38:39,623 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/data/b1cf587e8/8a7b1a134274412fb7b045b13d28bbdf/FLAG9289647b5 [2023-11-29 04:38:39,637 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/data/b1cf587e8/8a7b1a134274412fb7b045b13d28bbdf [2023-11-29 04:38:39,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:38:39,641 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:38:39,642 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:38:39,643 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:38:39,648 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:38:39,648 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:38:39" (1/1) ... [2023-11-29 04:38:39,649 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c90cc55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:38:39, skipping insertion in model container [2023-11-29 04:38:39,649 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:38:39" (1/1) ... [2023-11-29 04:38:39,673 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:38:39,840 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:38:39,854 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 04:38:39,858 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:38:39,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:38:39,885 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:38:39,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:38:39,923 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:38:39,923 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:38:39,929 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:38:39,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:38:39 WrapperNode [2023-11-29 04:38:39,930 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:38:39,931 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:38:39,931 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:38:39,932 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:38:39,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:38:39" (1/1) ... [2023-11-29 04:38:39,950 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:38:39" (1/1) ... [2023-11-29 04:38:39,979 INFO L138 Inliner]: procedures = 28, calls = 51, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 188 [2023-11-29 04:38:39,979 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:38:39,980 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:38:39,980 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:38:39,980 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:38:39,989 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:38:39" (1/1) ... [2023-11-29 04:38:39,989 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:38:39" (1/1) ... [2023-11-29 04:38:39,995 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:38:39" (1/1) ... [2023-11-29 04:38:40,015 INFO L175 MemorySlicer]: Split 13 memory accesses to 5 slices as follows [2, 2, 2, 2, 5]. 38 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-29 04:38:40,016 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:38:39" (1/1) ... [2023-11-29 04:38:40,016 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:38:39" (1/1) ... [2023-11-29 04:38:40,031 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:38:39" (1/1) ... [2023-11-29 04:38:40,036 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:38:39" (1/1) ... [2023-11-29 04:38:40,039 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:38:39" (1/1) ... [2023-11-29 04:38:40,042 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:38:39" (1/1) ... [2023-11-29 04:38:40,047 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:38:40,048 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:38:40,048 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:38:40,049 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:38:40,049 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:38:39" (1/1) ... [2023-11-29 04:38:40,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:38:40,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:38:40,093 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:38:40,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:38:40,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:38:40,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 04:38:40,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 04:38:40,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 04:38:40,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 04:38:40,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-29 04:38:40,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:38:40,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 04:38:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 04:38:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 04:38:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 04:38:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-29 04:38:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 04:38:40,159 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 04:38:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 04:38:40,159 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 04:38:40,160 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 04:38:40,160 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 04:38:40,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 04:38:40,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 04:38:40,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 04:38:40,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:38:40,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:38:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:38:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 04:38:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 04:38:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 04:38:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 04:38:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-29 04:38:40,163 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 04:38:40,292 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:38:40,293 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:38:40,775 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:38:40,992 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:38:40,992 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 04:38:40,992 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:38:40 BoogieIcfgContainer [2023-11-29 04:38:40,993 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:38:40,995 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:38:40,995 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:38:40,998 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:38:40,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:38:39" (1/3) ... [2023-11-29 04:38:40,998 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bfff1c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:38:40, skipping insertion in model container [2023-11-29 04:38:40,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:38:39" (2/3) ... [2023-11-29 04:38:40,999 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bfff1c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:38:40, skipping insertion in model container [2023-11-29 04:38:40,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:38:40" (3/3) ... [2023-11-29 04:38:41,000 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2023-11-29 04:38:41,016 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:38:41,016 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2023-11-29 04:38:41,016 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 04:38:41,088 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 04:38:41,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 69 transitions, 159 flow [2023-11-29 04:38:41,148 INFO L124 PetriNetUnfolderBase]: 3/66 cut-off events. [2023-11-29 04:38:41,149 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 04:38:41,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 66 events. 3/66 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 139 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2023-11-29 04:38:41,153 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 69 transitions, 159 flow [2023-11-29 04:38:41,157 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 65 transitions, 148 flow [2023-11-29 04:38:41,167 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:38:41,174 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;@57cdcce4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:38:41,174 INFO L358 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2023-11-29 04:38:41,178 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 04:38:41,178 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-29 04:38:41,178 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 04:38:41,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:38:41,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 04:38:41,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:38:41,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:38:41,185 INFO L85 PathProgramCache]: Analyzing trace with hash 537774, now seen corresponding path program 1 times [2023-11-29 04:38:41,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:38:41,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342726671] [2023-11-29 04:38:41,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:38:41,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:38:41,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:38:41,228 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:41,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:41,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 04:38:41,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:38:41,418 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 04:38:41,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,436 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 04:38:41,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,448 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 04:38:41,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,454 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 04:38:41,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,474 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 04:38:41,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,484 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 04:38:41,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,510 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 04:38:41,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 04:38:41,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,543 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 04:38:41,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,570 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 04:38:41,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,590 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 04:38:41,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,618 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 04:38:41,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,629 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 04:38:41,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,638 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 04:38:41,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,646 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 04:38:41,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,654 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 04:38:41,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,674 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 04:38:41,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,684 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 04:38:41,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,705 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 04:38:41,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,715 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 04:38:41,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,725 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 04:38:41,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,731 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 04:38:41,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,739 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 04:38:41,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:41,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 04:38:41,757 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 04:38:41,757 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:38:41,758 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:38:41,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342726671] [2023-11-29 04:38:41,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342726671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:38:41,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:38:41,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:38:41,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446434360] [2023-11-29 04:38:41,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:38:41,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:38:41,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:38:41,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:38:41,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:38:41,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 69 [2023-11-29 04:38:41,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 65 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 04:38:41,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:38:41,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 69 [2023-11-29 04:38:41,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:38:42,306 INFO L124 PetriNetUnfolderBase]: 886/1911 cut-off events. [2023-11-29 04:38:42,307 INFO L125 PetriNetUnfolderBase]: For 132/135 co-relation queries the response was YES. [2023-11-29 04:38:42,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3376 conditions, 1911 events. 886/1911 cut-off events. For 132/135 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 13344 event pairs, 768 based on Foata normal form. 1/1290 useless extension candidates. Maximal degree in co-relation 3247. Up to 1319 conditions per place. [2023-11-29 04:38:42,333 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 28 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-11-29 04:38:42,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 62 transitions, 202 flow [2023-11-29 04:38:42,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:38:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:38:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2023-11-29 04:38:42,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6763285024154589 [2023-11-29 04:38:42,347 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 140 transitions. [2023-11-29 04:38:42,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 140 transitions. [2023-11-29 04:38:42,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:38:42,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 140 transitions. [2023-11-29 04:38:42,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 04:38:42,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 04:38:42,359 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 04:38:42,361 INFO L175 Difference]: Start difference. First operand has 72 places, 65 transitions, 148 flow. Second operand 3 states and 140 transitions. [2023-11-29 04:38:42,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 62 transitions, 202 flow [2023-11-29 04:38:42,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 62 transitions, 190 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 04:38:42,372 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 134 flow [2023-11-29 04:38:42,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2023-11-29 04:38:42,378 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -7 predicate places. [2023-11-29 04:38:42,379 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 134 flow [2023-11-29 04:38:42,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 04:38:42,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:38:42,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 04:38:42,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:42,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:42,582 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:38:42,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:38:42,582 INFO L85 PathProgramCache]: Analyzing trace with hash 537775, now seen corresponding path program 1 times [2023-11-29 04:38:42,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:38:42,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355746415] [2023-11-29 04:38:42,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:38:42,583 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 04:38:42,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:38:42,585 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:42,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:42,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:38:42,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:38:42,679 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 04:38:42,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:42,694 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 04:38:42,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:42,709 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 13 treesize of output 1 [2023-11-29 04:38:42,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:42,729 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 04:38:42,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:42,739 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 04:38:42,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:42,750 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 04:38:42,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:42,778 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 04:38:42,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:42,790 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 04:38:42,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:42,822 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 04:38:42,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:42,854 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 04:38:42,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:42,870 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 04:38:42,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:42,890 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 04:38:42,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:42,907 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 04:38:42,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:42,916 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 04:38:42,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:42,925 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 8 treesize of output 1 [2023-11-29 04:38:42,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:42,937 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 04:38:42,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:42,953 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 04:38:42,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:42,974 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 04:38:42,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:42,991 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 04:38:43,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:43,011 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 04:38:43,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:43,023 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 04:38:43,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:43,031 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 04:38:43,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:43,040 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 04:38:43,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:43,050 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 04:38:43,133 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 04:38:43,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:38:43,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:38:43,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355746415] [2023-11-29 04:38:43,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355746415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:38:43,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:38:43,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:38:43,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976559319] [2023-11-29 04:38:43,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:38:43,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:38:43,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:38:43,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:38:43,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:38:43,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 69 [2023-11-29 04:38:43,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 04:38:43,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:38:43,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 69 [2023-11-29 04:38:43,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:38:43,864 INFO L124 PetriNetUnfolderBase]: 887/1914 cut-off events. [2023-11-29 04:38:43,864 INFO L125 PetriNetUnfolderBase]: For 25/28 co-relation queries the response was YES. [2023-11-29 04:38:43,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3302 conditions, 1914 events. 887/1914 cut-off events. For 25/28 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 13341 event pairs, 768 based on Foata normal form. 0/1292 useless extension candidates. Maximal degree in co-relation 3280. Up to 1324 conditions per place. [2023-11-29 04:38:43,882 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 30 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2023-11-29 04:38:43,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 65 transitions, 210 flow [2023-11-29 04:38:43,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:38:43,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 04:38:43,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 179 transitions. [2023-11-29 04:38:43,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2023-11-29 04:38:43,885 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 179 transitions. [2023-11-29 04:38:43,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 179 transitions. [2023-11-29 04:38:43,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:38:43,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 179 transitions. [2023-11-29 04:38:43,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 04:38:43,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 04:38:43,889 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 04:38:43,889 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 134 flow. Second operand 4 states and 179 transitions. [2023-11-29 04:38:43,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 65 transitions, 210 flow [2023-11-29 04:38:43,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 65 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 04:38:43,892 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 157 flow [2023-11-29 04:38:43,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2023-11-29 04:38:43,893 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -4 predicate places. [2023-11-29 04:38:43,893 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 157 flow [2023-11-29 04:38:43,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 04:38:43,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:38:43,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 04:38:43,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:44,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:44,101 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:38:44,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:38:44,102 INFO L85 PathProgramCache]: Analyzing trace with hash 537813, now seen corresponding path program 1 times [2023-11-29 04:38:44,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:38:44,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686826013] [2023-11-29 04:38:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:38:44,103 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 04:38:44,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:38:44,104 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:44,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:44,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:38:44,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:38:44,249 INFO L349 Elim1Store]: treesize reduction 103, result has 12.7 percent of original size [2023-11-29 04:38:44,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 40 [2023-11-29 04:38:44,300 INFO L349 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2023-11-29 04:38:44,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 40 [2023-11-29 04:38:44,439 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 04:38:44,439 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:38:44,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:38:44,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686826013] [2023-11-29 04:38:44,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686826013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:38:44,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:38:44,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:38:44,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267213598] [2023-11-29 04:38:44,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:38:44,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:38:44,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:38:44,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:38:44,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:38:44,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 69 [2023-11-29 04:38:44,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 04:38:44,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:38:44,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 69 [2023-11-29 04:38:44,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:38:44,983 INFO L124 PetriNetUnfolderBase]: 887/1787 cut-off events. [2023-11-29 04:38:44,983 INFO L125 PetriNetUnfolderBase]: For 25/28 co-relation queries the response was YES. [2023-11-29 04:38:44,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3184 conditions, 1787 events. 887/1787 cut-off events. For 25/28 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 11535 event pairs, 768 based on Foata normal form. 148/1440 useless extension candidates. Maximal degree in co-relation 3160. Up to 1324 conditions per place. [2023-11-29 04:38:44,997 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 32 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2023-11-29 04:38:44,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 63 transitions, 219 flow [2023-11-29 04:38:44,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:38:44,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:38:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2023-11-29 04:38:45,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6618357487922706 [2023-11-29 04:38:45,000 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 137 transitions. [2023-11-29 04:38:45,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 137 transitions. [2023-11-29 04:38:45,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:38:45,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 137 transitions. [2023-11-29 04:38:45,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 04:38:45,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 04:38:45,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 04:38:45,003 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 157 flow. Second operand 3 states and 137 transitions. [2023-11-29 04:38:45,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 63 transitions, 219 flow [2023-11-29 04:38:45,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 63 transitions, 216 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:38:45,005 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 152 flow [2023-11-29 04:38:45,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2023-11-29 04:38:45,006 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -5 predicate places. [2023-11-29 04:38:45,007 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 152 flow [2023-11-29 04:38:45,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 04:38:45,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:38:45,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 04:38:45,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:45,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:45,210 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:38:45,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:38:45,210 INFO L85 PathProgramCache]: Analyzing trace with hash 537814, now seen corresponding path program 1 times [2023-11-29 04:38:45,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:38:45,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163030957] [2023-11-29 04:38:45,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:38:45,211 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 04:38:45,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:38:45,212 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:45,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:45,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:38:45,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:38:45,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:45,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 04:38:45,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:45,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 04:38:45,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:45,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:45,370 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 5 [2023-11-29 04:38:45,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:45,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:45,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 04:38:45,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:45,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:45,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 04:38:45,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:45,447 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 5 [2023-11-29 04:38:45,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:45,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:45,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:45,481 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 5 [2023-11-29 04:38:45,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:45,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-29 04:38:45,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:45,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:45,533 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 16 treesize of output 5 [2023-11-29 04:38:45,552 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 04:38:45,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:45,572 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 5 [2023-11-29 04:38:45,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:45,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 04:38:45,632 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 04:38:45,633 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:38:45,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:38:45,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163030957] [2023-11-29 04:38:45,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163030957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:38:45,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:38:45,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:38:45,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234721282] [2023-11-29 04:38:45,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:38:45,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:38:45,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:38:45,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:38:45,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:38:45,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 69 [2023-11-29 04:38:45,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 04:38:45,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:38:45,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 69 [2023-11-29 04:38:45,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:38:46,066 INFO L124 PetriNetUnfolderBase]: 887/1660 cut-off events. [2023-11-29 04:38:46,066 INFO L125 PetriNetUnfolderBase]: For 25/28 co-relation queries the response was YES. [2023-11-29 04:38:46,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3056 conditions, 1660 events. 887/1660 cut-off events. For 25/28 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9758 event pairs, 768 based on Foata normal form. 148/1440 useless extension candidates. Maximal degree in co-relation 3047. Up to 1324 conditions per place. [2023-11-29 04:38:46,077 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 32 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-11-29 04:38:46,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 214 flow [2023-11-29 04:38:46,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:38:46,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:38:46,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2023-11-29 04:38:46,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6618357487922706 [2023-11-29 04:38:46,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 137 transitions. [2023-11-29 04:38:46,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 137 transitions. [2023-11-29 04:38:46,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:38:46,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 137 transitions. [2023-11-29 04:38:46,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 04:38:46,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 04:38:46,082 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 04:38:46,082 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 152 flow. Second operand 3 states and 137 transitions. [2023-11-29 04:38:46,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 214 flow [2023-11-29 04:38:46,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 61 transitions, 213 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:38:46,085 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 149 flow [2023-11-29 04:38:46,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-11-29 04:38:46,086 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -6 predicate places. [2023-11-29 04:38:46,086 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 149 flow [2023-11-29 04:38:46,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 04:38:46,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:38:46,086 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-29 04:38:46,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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)] Forceful destruction successful, exit code 0 [2023-11-29 04:38:46,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:46,287 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:38:46,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:38:46,287 INFO L85 PathProgramCache]: Analyzing trace with hash 516818688, now seen corresponding path program 1 times [2023-11-29 04:38:46,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:38:46,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459624450] [2023-11-29 04:38:46,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:38:46,288 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 04:38:46,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:38:46,289 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:46,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:46,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:38:46,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:38:46,383 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 04:38:46,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,398 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 04:38:46,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,431 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 04:38:46,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,450 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 04:38:46,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,464 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 04:38:46,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,483 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 04:38:46,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:38:46,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,514 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 04:38:46,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,523 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 04:38:46,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:38:46,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,541 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 04:38:46,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,551 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 04:38:46,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,561 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 04:38:46,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,571 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 04:38:46,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,583 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 04:38:46,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,603 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 04:38:46,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,611 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 04:38:46,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,620 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 04:38:46,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,651 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 04:38:46,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 04:38:46,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,677 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 8 treesize of output 1 [2023-11-29 04:38:46,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,686 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 04:38:46,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,697 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 04:38:46,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:46,706 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 04:38:46,861 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 04:38:46,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:38:47,261 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 04:38:47,262 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:38:47,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459624450] [2023-11-29 04:38:47,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459624450] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:38:47,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:38:47,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 04:38:47,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658901172] [2023-11-29 04:38:47,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:38:47,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 04:38:47,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:38:47,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 04:38:47,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-29 04:38:48,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 69 [2023-11-29 04:38:48,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 149 flow. Second operand has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 04:38:48,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:38:48,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 69 [2023-11-29 04:38:48,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:38:49,442 INFO L124 PetriNetUnfolderBase]: 890/1669 cut-off events. [2023-11-29 04:38:49,442 INFO L125 PetriNetUnfolderBase]: For 25/28 co-relation queries the response was YES. [2023-11-29 04:38:49,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3085 conditions, 1669 events. 890/1669 cut-off events. For 25/28 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9791 event pairs, 768 based on Foata normal form. 0/1297 useless extension candidates. Maximal degree in co-relation 3075. Up to 1327 conditions per place. [2023-11-29 04:38:49,455 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 30 selfloop transitions, 13 changer transitions 0/70 dead transitions. [2023-11-29 04:38:49,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 70 transitions, 271 flow [2023-11-29 04:38:49,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:38:49,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 04:38:49,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 406 transitions. [2023-11-29 04:38:49,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884057971014492 [2023-11-29 04:38:49,458 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 406 transitions. [2023-11-29 04:38:49,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 406 transitions. [2023-11-29 04:38:49,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:38:49,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 406 transitions. [2023-11-29 04:38:49,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 40.6) internal successors, (406), 10 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 04:38:49,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 69.0) internal successors, (759), 11 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:49,463 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 69.0) internal successors, (759), 11 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:38:49,463 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 149 flow. Second operand 10 states and 406 transitions. [2023-11-29 04:38:49,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 70 transitions, 271 flow [2023-11-29 04:38:49,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 70 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:38:49,466 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 228 flow [2023-11-29 04:38:49,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=228, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2023-11-29 04:38:49,467 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2023-11-29 04:38:49,467 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 228 flow [2023-11-29 04:38:49,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 04:38:49,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:38:49,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 04:38:49,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:49,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:49,670 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:38:49,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:38:49,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1157341822, now seen corresponding path program 1 times [2023-11-29 04:38:49,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:38:49,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107672033] [2023-11-29 04:38:49,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:38:49,671 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 04:38:49,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:38:49,672 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:49,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:49,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:38:49,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:38:49,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:49,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:49,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 04:38:49,783 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 04:38:49,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:49,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 04:38:49,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:49,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 04:38:49,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:49,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:49,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 04:38:49,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:49,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:49,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 04:38:49,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:49,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 04:38:49,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:49,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:49,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:49,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 04:38:49,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:49,939 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 04:38:49,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:49,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:49,971 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 04:38:49,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:49,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 04:38:50,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:50,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:50,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-29 04:38:50,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:50,029 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 04:38:50,101 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 04:38:50,101 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:38:50,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:38:50,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107672033] [2023-11-29 04:38:50,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107672033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:38:50,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:38:50,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:38:50,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31061227] [2023-11-29 04:38:50,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:38:50,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:38:50,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:38:50,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:38:50,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:38:50,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 69 [2023-11-29 04:38:50,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 04:38:50,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:38:50,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 69 [2023-11-29 04:38:50,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:38:50,460 INFO L124 PetriNetUnfolderBase]: 890/1650 cut-off events. [2023-11-29 04:38:50,460 INFO L125 PetriNetUnfolderBase]: For 34/37 co-relation queries the response was YES. [2023-11-29 04:38:50,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3090 conditions, 1650 events. 890/1650 cut-off events. For 34/37 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9616 event pairs, 768 based on Foata normal form. 25/1326 useless extension candidates. Maximal degree in co-relation 3076. Up to 1333 conditions per place. [2023-11-29 04:38:50,470 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 41 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2023-11-29 04:38:50,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 68 transitions, 308 flow [2023-11-29 04:38:50,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:38:50,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:38:50,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2023-11-29 04:38:50,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6618357487922706 [2023-11-29 04:38:50,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 137 transitions. [2023-11-29 04:38:50,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 137 transitions. [2023-11-29 04:38:50,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:38:50,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 137 transitions. [2023-11-29 04:38:50,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 04:38:50,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 04:38:50,474 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 04:38:50,474 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 228 flow. Second operand 3 states and 137 transitions. [2023-11-29 04:38:50,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 68 transitions, 308 flow [2023-11-29 04:38:50,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 68 transitions, 278 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-29 04:38:50,477 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 196 flow [2023-11-29 04:38:50,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2023-11-29 04:38:50,478 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2023-11-29 04:38:50,478 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 196 flow [2023-11-29 04:38:50,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 04:38:50,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:38:50,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 04:38:50,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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)] Ended with exit code 0 [2023-11-29 04:38:50,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:50,681 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:38:50,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:38:50,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1157341823, now seen corresponding path program 1 times [2023-11-29 04:38:50,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:38:50,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742743160] [2023-11-29 04:38:50,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:38:50,682 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 04:38:50,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:38:50,683 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:50,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:50,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 04:38:50,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:38:50,778 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 04:38:50,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-29 04:38:50,798 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:38:50,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-29 04:38:50,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:50,838 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 04:38:50,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-29 04:38:50,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:50,865 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:38:50,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-29 04:38:50,884 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:38:50,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2023-11-29 04:38:50,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:50,909 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 04:38:50,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-29 04:38:50,925 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:38:50,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2023-11-29 04:38:50,946 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 04:38:50,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2023-11-29 04:38:51,197 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 04:38:51,197 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:38:51,197 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:38:51,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742743160] [2023-11-29 04:38:51,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742743160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:38:51,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:38:51,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:38:51,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888419081] [2023-11-29 04:38:51,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:38:51,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:38:51,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:38:51,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:38:51,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:38:51,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2023-11-29 04:38:51,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 04:38:51,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:38:51,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2023-11-29 04:38:51,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:38:51,609 INFO L124 PetriNetUnfolderBase]: 932/1680 cut-off events. [2023-11-29 04:38:51,610 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-11-29 04:38:51,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3176 conditions, 1680 events. 932/1680 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9574 event pairs, 806 based on Foata normal form. 0/1340 useless extension candidates. Maximal degree in co-relation 3162. Up to 1403 conditions per place. [2023-11-29 04:38:51,624 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 43 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2023-11-29 04:38:51,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 66 transitions, 280 flow [2023-11-29 04:38:51,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:38:51,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:38:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-11-29 04:38:51,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.642512077294686 [2023-11-29 04:38:51,626 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-11-29 04:38:51,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-11-29 04:38:51,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:38:51,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-11-29 04:38:51,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 04:38:51,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 04:38:51,628 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 04:38:51,628 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 196 flow. Second operand 3 states and 133 transitions. [2023-11-29 04:38:51,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 66 transitions, 280 flow [2023-11-29 04:38:51,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 66 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:38:51,630 INFO L231 Difference]: Finished difference. Result has 73 places, 66 transitions, 193 flow [2023-11-29 04:38:51,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=193, PETRI_PLACES=73, PETRI_TRANSITIONS=66} [2023-11-29 04:38:51,631 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2023-11-29 04:38:51,631 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 66 transitions, 193 flow [2023-11-29 04:38:51,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 04:38:51,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:38:51,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:38:51,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:51,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:51,834 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:38:51,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:38:51,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1517825445, now seen corresponding path program 1 times [2023-11-29 04:38:51,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:38:51,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717495719] [2023-11-29 04:38:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:38:51,835 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 04:38:51,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:38:51,836 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:51,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:51,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 04:38:51,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:38:51,896 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 04:38:51,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:51,901 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 04:38:51,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:51,906 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 04:38:51,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:51,910 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 6 treesize of output 1 [2023-11-29 04:38:51,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:51,922 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 04:38:51,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:51,928 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 04:38:51,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:51,936 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 04:38:51,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:51,940 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 04:38:51,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:51,952 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 04:38:51,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:51,958 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 04:38:51,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:51,964 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 04:38:51,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:51,968 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 04:38:51,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:51,989 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 04:38:52,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:52,002 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 04:38:52,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:52,009 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 04:38:52,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:52,019 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 04:38:52,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:52,031 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 04:38:52,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:52,037 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 04:38:52,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:52,044 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 04:38:52,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:52,047 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 04:38:52,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:52,053 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 04:38:52,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:52,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 04:38:52,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:52,070 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 04:38:52,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:52,076 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 04:38:52,098 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 04:38:52,098 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:38:52,098 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:38:52,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717495719] [2023-11-29 04:38:52,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717495719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:38:52,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:38:52,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:38:52,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769050772] [2023-11-29 04:38:52,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:38:52,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:38:52,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:38:52,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:38:52,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:38:52,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2023-11-29 04:38:52,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 193 flow. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 04:38:52,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:38:52,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2023-11-29 04:38:52,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:38:52,464 INFO L124 PetriNetUnfolderBase]: 855/1510 cut-off events. [2023-11-29 04:38:52,465 INFO L125 PetriNetUnfolderBase]: For 35/41 co-relation queries the response was YES. [2023-11-29 04:38:52,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2858 conditions, 1510 events. 855/1510 cut-off events. For 35/41 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7766 event pairs, 724 based on Foata normal form. 0/1329 useless extension candidates. Maximal degree in co-relation 2843. Up to 1257 conditions per place. [2023-11-29 04:38:52,476 INFO L140 encePairwiseOnDemand]: 63/69 looper letters, 35 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2023-11-29 04:38:52,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 62 transitions, 267 flow [2023-11-29 04:38:52,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:38:52,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 04:38:52,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 165 transitions. [2023-11-29 04:38:52,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2023-11-29 04:38:52,477 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 165 transitions. [2023-11-29 04:38:52,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 165 transitions. [2023-11-29 04:38:52,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:38:52,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 165 transitions. [2023-11-29 04:38:52,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 41.25) internal successors, (165), 4 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 04:38:52,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 04:38:52,479 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 04:38:52,479 INFO L175 Difference]: Start difference. First operand has 73 places, 66 transitions, 193 flow. Second operand 4 states and 165 transitions. [2023-11-29 04:38:52,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 62 transitions, 267 flow [2023-11-29 04:38:52,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 62 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:38:52,481 INFO L231 Difference]: Finished difference. Result has 71 places, 62 transitions, 196 flow [2023-11-29 04:38:52,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2023-11-29 04:38:52,482 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2023-11-29 04:38:52,482 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 196 flow [2023-11-29 04:38:52,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 04:38:52,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:38:52,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:38:52,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:52,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:52,683 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:38:52,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:38:52,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1517825444, now seen corresponding path program 1 times [2023-11-29 04:38:52,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:38:52,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541242820] [2023-11-29 04:38:52,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:38:52,684 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 04:38:52,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:38:52,685 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:52,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:52,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:38:52,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:38:52,787 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 04:38:52,787 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:38:52,788 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:38:52,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541242820] [2023-11-29 04:38:52,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541242820] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:38:52,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:38:52,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:38:52,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944323011] [2023-11-29 04:38:52,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:38:52,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:38:52,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:38:52,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:38:52,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:38:52,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 69 [2023-11-29 04:38:52,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 196 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 04:38:52,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:38:52,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 69 [2023-11-29 04:38:52,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:38:53,074 INFO L124 PetriNetUnfolderBase]: 731/1382 cut-off events. [2023-11-29 04:38:53,075 INFO L125 PetriNetUnfolderBase]: For 28/31 co-relation queries the response was YES. [2023-11-29 04:38:53,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2589 conditions, 1382 events. 731/1382 cut-off events. For 28/31 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7482 event pairs, 600 based on Foata normal form. 41/1247 useless extension candidates. Maximal degree in co-relation 2573. Up to 994 conditions per place. [2023-11-29 04:38:53,081 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 47 selfloop transitions, 3 changer transitions 2/74 dead transitions. [2023-11-29 04:38:53,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 74 transitions, 327 flow [2023-11-29 04:38:53,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:38:53,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 04:38:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2023-11-29 04:38:53,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7101449275362319 [2023-11-29 04:38:53,082 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 196 transitions. [2023-11-29 04:38:53,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 196 transitions. [2023-11-29 04:38:53,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:38:53,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 196 transitions. [2023-11-29 04:38:53,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states 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 04:38:53,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 04:38:53,084 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 04:38:53,084 INFO L175 Difference]: Start difference. First operand has 71 places, 62 transitions, 196 flow. Second operand 4 states and 196 transitions. [2023-11-29 04:38:53,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 74 transitions, 327 flow [2023-11-29 04:38:53,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 04:38:53,087 INFO L231 Difference]: Finished difference. Result has 73 places, 62 transitions, 206 flow [2023-11-29 04:38:53,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=73, PETRI_TRANSITIONS=62} [2023-11-29 04:38:53,087 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2023-11-29 04:38:53,088 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 62 transitions, 206 flow [2023-11-29 04:38:53,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 04:38:53,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:38:53,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:38:53,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:53,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:53,289 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:38:53,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:38:53,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1627747425, now seen corresponding path program 1 times [2023-11-29 04:38:53,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:38:53,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106645798] [2023-11-29 04:38:53,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:38:53,289 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 04:38:53,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:38:53,290 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:53,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:53,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 04:38:53,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:38:53,377 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:38:53,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-29 04:38:53,397 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:38:53,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 04:38:53,412 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:38:53,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-29 04:38:53,434 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:38:53,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-29 04:38:53,455 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:38:53,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 04:38:53,471 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:38:53,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-29 04:38:53,500 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:38:53,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-29 04:38:53,523 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:38:53,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 04:38:53,543 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:38:53,544 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 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 04:38:53,562 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:38:53,562 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 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 04:38:53,575 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:38:53,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-29 04:38:53,589 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:38:53,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-29 04:38:53,725 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 04:38:53,725 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:38:53,725 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:38:53,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106645798] [2023-11-29 04:38:53,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106645798] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:38:53,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:38:53,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:38:53,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854069310] [2023-11-29 04:38:53,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:38:53,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:38:53,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:38:53,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:38:53,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:38:53,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2023-11-29 04:38:53,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 62 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 04:38:53,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:38:53,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2023-11-29 04:38:53,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:38:54,060 INFO L124 PetriNetUnfolderBase]: 823/1452 cut-off events. [2023-11-29 04:38:54,060 INFO L125 PetriNetUnfolderBase]: For 150/159 co-relation queries the response was YES. [2023-11-29 04:38:54,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3108 conditions, 1452 events. 823/1452 cut-off events. For 150/159 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7248 event pairs, 674 based on Foata normal form. 0/1268 useless extension candidates. Maximal degree in co-relation 3091. Up to 1248 conditions per place. [2023-11-29 04:38:54,067 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 41 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-11-29 04:38:54,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 60 transitions, 286 flow [2023-11-29 04:38:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:38:54,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:38:54,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2023-11-29 04:38:54,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6328502415458938 [2023-11-29 04:38:54,068 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 131 transitions. [2023-11-29 04:38:54,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 131 transitions. [2023-11-29 04:38:54,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:38:54,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 131 transitions. [2023-11-29 04:38:54,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 04:38:54,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 04:38:54,069 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 04:38:54,070 INFO L175 Difference]: Start difference. First operand has 73 places, 62 transitions, 206 flow. Second operand 3 states and 131 transitions. [2023-11-29 04:38:54,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 60 transitions, 286 flow [2023-11-29 04:38:54,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 60 transitions, 281 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 04:38:54,071 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 199 flow [2023-11-29 04:38:54,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2023-11-29 04:38:54,072 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2023-11-29 04:38:54,072 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 199 flow [2023-11-29 04:38:54,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 04:38:54,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:38:54,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:38:54,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:54,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:54,273 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:38:54,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:38:54,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1627747426, now seen corresponding path program 1 times [2023-11-29 04:38:54,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:38:54,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600335537] [2023-11-29 04:38:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:38:54,274 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 04:38:54,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:38:54,275 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:54,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:54,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:38:54,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:38:54,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:54,377 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 04:38:54,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 04:38:54,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:54,393 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 04:38:54,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:54,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:54,402 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 04:38:54,408 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 04:38:54,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:54,414 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 04:38:54,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:54,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:54,423 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 04:38:54,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:54,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:54,434 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 04:38:54,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:54,438 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 04:38:54,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:54,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:54,447 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 04:38:54,451 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 04:38:54,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:54,457 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 04:38:54,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:54,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:54,467 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 04:38:54,503 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 04:38:54,503 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:38:54,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:38:54,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600335537] [2023-11-29 04:38:54,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600335537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:38:54,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:38:54,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:38:54,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329689578] [2023-11-29 04:38:54,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:38:54,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:38:54,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:38:54,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:38:54,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:38:54,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 69 [2023-11-29 04:38:54,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 04:38:54,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:38:54,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 69 [2023-11-29 04:38:54,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:38:54,800 INFO L124 PetriNetUnfolderBase]: 731/1282 cut-off events. [2023-11-29 04:38:54,800 INFO L125 PetriNetUnfolderBase]: For 133/150 co-relation queries the response was YES. [2023-11-29 04:38:54,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2772 conditions, 1282 events. 731/1282 cut-off events. For 133/150 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6519 event pairs, 600 based on Foata normal form. 48/1178 useless extension candidates. Maximal degree in co-relation 2755. Up to 1108 conditions per place. [2023-11-29 04:38:54,805 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 38 selfloop transitions, 1 changer transitions 1/58 dead transitions. [2023-11-29 04:38:54,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 58 transitions, 275 flow [2023-11-29 04:38:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:38:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:38:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2023-11-29 04:38:54,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2023-11-29 04:38:54,806 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2023-11-29 04:38:54,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2023-11-29 04:38:54,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:38:54,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2023-11-29 04:38:54,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 04:38:54,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 04:38:54,808 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 04:38:54,808 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 199 flow. Second operand 3 states and 135 transitions. [2023-11-29 04:38:54,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 58 transitions, 275 flow [2023-11-29 04:38:54,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 58 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:38:54,810 INFO L231 Difference]: Finished difference. Result has 70 places, 57 transitions, 189 flow [2023-11-29 04:38:54,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=70, PETRI_TRANSITIONS=57} [2023-11-29 04:38:54,811 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -2 predicate places. [2023-11-29 04:38:54,811 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 57 transitions, 189 flow [2023-11-29 04:38:54,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 04:38:54,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:38:54,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:38:54,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:55,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:55,012 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:38:55,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:38:55,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1837765677, now seen corresponding path program 1 times [2023-11-29 04:38:55,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:38:55,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167023297] [2023-11-29 04:38:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:38:55,013 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 04:38:55,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:38:55,014 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:55,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:38:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:55,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 04:38:55,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:38:55,118 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 04:38:55,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,145 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 04:38:55,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,163 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 04:38:55,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,172 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 04:38:55,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,182 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 04:38:55,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,198 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 04:38:55,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,209 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 04:38:55,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,225 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 04:38:55,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,234 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 04:38:55,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,244 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 04:38:55,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,253 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 04:38:55,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,259 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 04:38:55,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,271 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 04:38:55,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,278 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 04:38:55,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,287 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 04:38:55,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,293 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 04:38:55,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,303 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 04:38:55,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,319 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 04:38:55,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,328 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 04:38:55,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,338 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 04:38:55,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,356 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 04:38:55,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,366 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 04:38:55,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,373 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 8 treesize of output 1 [2023-11-29 04:38:55,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:55,382 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 04:38:55,577 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 04:38:55,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:38:56,367 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 04:38:56,367 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:38:56,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167023297] [2023-11-29 04:38:56,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167023297] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:38:56,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:38:56,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 04:38:56,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489411436] [2023-11-29 04:38:56,367 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:38:56,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 04:38:56,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:38:56,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 04:38:56,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-29 04:38:58,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 69 [2023-11-29 04:38:58,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 57 transitions, 189 flow. Second operand has 10 states, 10 states have (on average 37.6) internal successors, (376), 10 states have internal predecessors, (376), 0 states have call successors, (0), 0 states 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 04:38:58,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:38:58,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 69 [2023-11-29 04:38:58,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:39:00,836 INFO L124 PetriNetUnfolderBase]: 1313/2435 cut-off events. [2023-11-29 04:39:00,836 INFO L125 PetriNetUnfolderBase]: For 352/359 co-relation queries the response was YES. [2023-11-29 04:39:00,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5044 conditions, 2435 events. 1313/2435 cut-off events. For 352/359 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14493 event pairs, 1082 based on Foata normal form. 51/2297 useless extension candidates. Maximal degree in co-relation 5026. Up to 984 conditions per place. [2023-11-29 04:39:00,847 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 51 selfloop transitions, 10 changer transitions 19/97 dead transitions. [2023-11-29 04:39:00,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 97 transitions, 450 flow [2023-11-29 04:39:00,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 04:39:00,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 04:39:00,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 408 transitions. [2023-11-29 04:39:00,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6570048309178744 [2023-11-29 04:39:00,850 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 408 transitions. [2023-11-29 04:39:00,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 408 transitions. [2023-11-29 04:39:00,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:39:00,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 408 transitions. [2023-11-29 04:39:00,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 45.333333333333336) internal successors, (408), 9 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 04:39:00,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 69.0) internal successors, (690), 10 states have internal predecessors, (690), 0 states have call successors, (0), 0 states 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 04:39:00,854 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 69.0) internal successors, (690), 10 states have internal predecessors, (690), 0 states have call successors, (0), 0 states 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 04:39:00,854 INFO L175 Difference]: Start difference. First operand has 70 places, 57 transitions, 189 flow. Second operand 9 states and 408 transitions. [2023-11-29 04:39:00,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 97 transitions, 450 flow [2023-11-29 04:39:00,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 97 transitions, 449 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:39:00,856 INFO L231 Difference]: Finished difference. Result has 78 places, 56 transitions, 215 flow [2023-11-29 04:39:00,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=215, PETRI_PLACES=78, PETRI_TRANSITIONS=56} [2023-11-29 04:39:00,856 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2023-11-29 04:39:00,857 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 56 transitions, 215 flow [2023-11-29 04:39:00,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 37.6) internal successors, (376), 10 states have internal predecessors, (376), 0 states have call successors, (0), 0 states 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 04:39:00,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:39:00,857 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-29 04:39:00,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:01,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:01,058 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:39:01,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:01,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1004788851, now seen corresponding path program 2 times [2023-11-29 04:39:01,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:39:01,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473966237] [2023-11-29 04:39:01,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:39:01,059 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 04:39:01,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:39:01,059 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:01,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:01,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:39:01,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:39:01,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:39:01,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:01,156 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 04:39:01,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,165 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 04:39:01,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,174 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 04:39:01,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,180 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 04:39:01,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,191 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 04:39:01,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,208 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 04:39:01,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,218 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 04:39:01,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,224 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 04:39:01,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,240 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 04:39:01,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,249 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 04:39:01,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,255 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 04:39:01,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,263 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 04:39:01,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,270 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 04:39:01,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,279 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 04:39:01,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,287 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 04:39:01,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,293 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 04:39:01,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,309 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 04:39:01,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,318 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 04:39:01,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,340 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 04:39:01,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,362 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 04:39:01,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,372 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 04:39:01,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,388 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 04:39:01,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,405 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 04:39:01,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:01,414 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 04:39:01,642 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 04:39:01,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:39:02,394 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 04:39:02,395 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:39:02,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473966237] [2023-11-29 04:39:02,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473966237] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:39:02,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:39:02,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 04:39:02,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18105161] [2023-11-29 04:39:02,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:39:02,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:39:02,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:39:02,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:39:02,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:39:05,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 69 [2023-11-29 04:39:05,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 56 transitions, 215 flow. Second operand has 14 states, 14 states have (on average 37.57142857142857) internal successors, (526), 14 states have internal predecessors, (526), 0 states have call successors, (0), 0 states 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 04:39:05,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:39:05,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 69 [2023-11-29 04:39:05,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:39:08,674 INFO L124 PetriNetUnfolderBase]: 1128/2036 cut-off events. [2023-11-29 04:39:08,674 INFO L125 PetriNetUnfolderBase]: For 949/961 co-relation queries the response was YES. [2023-11-29 04:39:08,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4670 conditions, 2036 events. 1128/2036 cut-off events. For 949/961 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11792 event pairs, 934 based on Foata normal form. 6/1937 useless extension candidates. Maximal degree in co-relation 4649. Up to 1687 conditions per place. [2023-11-29 04:39:08,683 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 28 selfloop transitions, 29 changer transitions 0/74 dead transitions. [2023-11-29 04:39:08,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 74 transitions, 443 flow [2023-11-29 04:39:08,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 04:39:08,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 04:39:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 855 transitions. [2023-11-29 04:39:08,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5632411067193676 [2023-11-29 04:39:08,687 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 855 transitions. [2023-11-29 04:39:08,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 855 transitions. [2023-11-29 04:39:08,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:39:08,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 855 transitions. [2023-11-29 04:39:08,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 38.86363636363637) internal successors, (855), 22 states have internal predecessors, (855), 0 states have call successors, (0), 0 states 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 04:39:08,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 69.0) internal successors, (1587), 23 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states 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 04:39:08,693 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 69.0) internal successors, (1587), 23 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states 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 04:39:08,693 INFO L175 Difference]: Start difference. First operand has 78 places, 56 transitions, 215 flow. Second operand 22 states and 855 transitions. [2023-11-29 04:39:08,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 74 transitions, 443 flow [2023-11-29 04:39:08,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 74 transitions, 428 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-29 04:39:08,698 INFO L231 Difference]: Finished difference. Result has 99 places, 74 transitions, 402 flow [2023-11-29 04:39:08,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=402, PETRI_PLACES=99, PETRI_TRANSITIONS=74} [2023-11-29 04:39:08,699 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 27 predicate places. [2023-11-29 04:39:08,699 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 74 transitions, 402 flow [2023-11-29 04:39:08,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 37.57142857142857) internal successors, (526), 14 states have internal predecessors, (526), 0 states have call successors, (0), 0 states 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 04:39:08,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:39:08,699 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:08,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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)] Ended with exit code 0 [2023-11-29 04:39:08,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:08,900 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:39:08,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:08,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1207830496, now seen corresponding path program 2 times [2023-11-29 04:39:08,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:39:08,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811544250] [2023-11-29 04:39:08,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:39:08,901 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 04:39:08,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:39:08,902 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:08,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:08,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 04:39:08,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:39:08,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 04:39:08,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:08,989 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 04:39:09,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,008 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 04:39:09,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,025 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 04:39:09,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,035 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 04:39:09,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,065 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 04:39:09,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,081 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 04:39:09,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,092 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 04:39:09,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,107 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 04:39:09,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,114 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 04:39:09,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,120 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 04:39:09,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,129 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 04:39:09,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,134 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 04:39:09,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,143 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 04:39:09,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,149 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 04:39:09,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,157 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 04:39:09,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,173 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 04:39:09,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,181 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 04:39:09,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,187 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 04:39:09,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,197 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 04:39:09,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,203 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 04:39:09,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,212 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 04:39:09,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,218 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 04:39:09,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,236 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 04:39:09,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:09,246 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 04:39:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 04:39:09,397 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:39:09,397 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:39:09,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811544250] [2023-11-29 04:39:09,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811544250] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:39:09,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:39:09,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:39:09,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758827017] [2023-11-29 04:39:09,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:39:09,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:39:09,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:39:09,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:39:09,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:39:09,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 69 [2023-11-29 04:39:09,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 74 transitions, 402 flow. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 04:39:09,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:39:09,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 69 [2023-11-29 04:39:09,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:39:09,936 INFO L124 PetriNetUnfolderBase]: 934/1737 cut-off events. [2023-11-29 04:39:09,936 INFO L125 PetriNetUnfolderBase]: For 474/480 co-relation queries the response was YES. [2023-11-29 04:39:09,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3640 conditions, 1737 events. 934/1737 cut-off events. For 474/480 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9912 event pairs, 756 based on Foata normal form. 85/1724 useless extension candidates. Maximal degree in co-relation 3613. Up to 1395 conditions per place. [2023-11-29 04:39:09,943 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 44 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2023-11-29 04:39:09,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 72 transitions, 498 flow [2023-11-29 04:39:09,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:39:09,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 04:39:09,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 176 transitions. [2023-11-29 04:39:09,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2023-11-29 04:39:09,945 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 176 transitions. [2023-11-29 04:39:09,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 176 transitions. [2023-11-29 04:39:09,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:39:09,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 176 transitions. [2023-11-29 04:39:09,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 04:39:09,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 04:39:09,947 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 04:39:09,947 INFO L175 Difference]: Start difference. First operand has 99 places, 74 transitions, 402 flow. Second operand 4 states and 176 transitions. [2023-11-29 04:39:09,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 72 transitions, 498 flow [2023-11-29 04:39:09,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 72 transitions, 420 flow, removed 27 selfloop flow, removed 10 redundant places. [2023-11-29 04:39:09,951 INFO L231 Difference]: Finished difference. Result has 90 places, 72 transitions, 332 flow [2023-11-29 04:39:09,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=332, PETRI_PLACES=90, PETRI_TRANSITIONS=72} [2023-11-29 04:39:09,952 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 18 predicate places. [2023-11-29 04:39:09,952 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 72 transitions, 332 flow [2023-11-29 04:39:09,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 04:39:09,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:39:09,953 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:09,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:10,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:10,153 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:39:10,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:10,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1256760262, now seen corresponding path program 1 times [2023-11-29 04:39:10,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:39:10,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477932838] [2023-11-29 04:39:10,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:39:10,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:39:10,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:39:10,155 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:10,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:10,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 04:39:10,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 04:39:10,297 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:39:10,297 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:39:10,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477932838] [2023-11-29 04:39:10,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477932838] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:39:10,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:39:10,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:39:10,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303497166] [2023-11-29 04:39:10,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:39:10,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:39:10,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:39:10,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:39:10,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:39:10,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 69 [2023-11-29 04:39:10,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 72 transitions, 332 flow. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 04:39:10,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:39:10,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 69 [2023-11-29 04:39:10,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:39:10,565 INFO L124 PetriNetUnfolderBase]: 706/1467 cut-off events. [2023-11-29 04:39:10,565 INFO L125 PetriNetUnfolderBase]: For 225/231 co-relation queries the response was YES. [2023-11-29 04:39:10,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2957 conditions, 1467 events. 706/1467 cut-off events. For 225/231 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8327 event pairs, 236 based on Foata normal form. 30/1407 useless extension candidates. Maximal degree in co-relation 2931. Up to 863 conditions per place. [2023-11-29 04:39:10,570 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 64 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2023-11-29 04:39:10,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 85 transitions, 498 flow [2023-11-29 04:39:10,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:39:10,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:39:10,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2023-11-29 04:39:10,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7294685990338164 [2023-11-29 04:39:10,572 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 151 transitions. [2023-11-29 04:39:10,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 151 transitions. [2023-11-29 04:39:10,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:39:10,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 151 transitions. [2023-11-29 04:39:10,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 04:39:10,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 04:39:10,573 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 04:39:10,573 INFO L175 Difference]: Start difference. First operand has 90 places, 72 transitions, 332 flow. Second operand 3 states and 151 transitions. [2023-11-29 04:39:10,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 85 transitions, 498 flow [2023-11-29 04:39:10,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 85 transitions, 487 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 04:39:10,577 INFO L231 Difference]: Finished difference. Result has 91 places, 74 transitions, 344 flow [2023-11-29 04:39:10,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=344, PETRI_PLACES=91, PETRI_TRANSITIONS=74} [2023-11-29 04:39:10,577 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 19 predicate places. [2023-11-29 04:39:10,577 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 74 transitions, 344 flow [2023-11-29 04:39:10,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 04:39:10,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:39:10,578 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:10,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:10,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:10,778 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:39:10,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:10,779 INFO L85 PathProgramCache]: Analyzing trace with hash -956532915, now seen corresponding path program 1 times [2023-11-29 04:39:10,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:39:10,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181996381] [2023-11-29 04:39:10,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:39:10,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:39:10,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:39:10,780 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:10,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:10,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 04:39:10,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 04:39:10,946 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:39:10,946 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:39:10,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181996381] [2023-11-29 04:39:10,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181996381] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:39:10,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:39:10,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:39:10,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619172507] [2023-11-29 04:39:10,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:39:10,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:39:10,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:39:10,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:39:10,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:39:10,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 69 [2023-11-29 04:39:10,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 74 transitions, 344 flow. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 04:39:10,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:39:10,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 69 [2023-11-29 04:39:10,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:39:11,246 INFO L124 PetriNetUnfolderBase]: 454/927 cut-off events. [2023-11-29 04:39:11,246 INFO L125 PetriNetUnfolderBase]: For 363/377 co-relation queries the response was YES. [2023-11-29 04:39:11,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2128 conditions, 927 events. 454/927 cut-off events. For 363/377 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4496 event pairs, 112 based on Foata normal form. 58/939 useless extension candidates. Maximal degree in co-relation 2101. Up to 292 conditions per place. [2023-11-29 04:39:11,250 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 68 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2023-11-29 04:39:11,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 91 transitions, 528 flow [2023-11-29 04:39:11,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:39:11,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 04:39:11,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 194 transitions. [2023-11-29 04:39:11,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7028985507246377 [2023-11-29 04:39:11,252 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 194 transitions. [2023-11-29 04:39:11,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 194 transitions. [2023-11-29 04:39:11,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:39:11,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 194 transitions. [2023-11-29 04:39:11,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 04:39:11,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 04:39:11,254 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 04:39:11,254 INFO L175 Difference]: Start difference. First operand has 91 places, 74 transitions, 344 flow. Second operand 4 states and 194 transitions. [2023-11-29 04:39:11,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 91 transitions, 528 flow [2023-11-29 04:39:11,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 91 transitions, 515 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-29 04:39:11,258 INFO L231 Difference]: Finished difference. Result has 93 places, 74 transitions, 347 flow [2023-11-29 04:39:11,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=347, PETRI_PLACES=93, PETRI_TRANSITIONS=74} [2023-11-29 04:39:11,259 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 21 predicate places. [2023-11-29 04:39:11,259 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 74 transitions, 347 flow [2023-11-29 04:39:11,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 04:39:11,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:39:11,260 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:11,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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)] Forceful destruction successful, exit code 0 [2023-11-29 04:39:11,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:11,460 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:39:11,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:11,460 INFO L85 PathProgramCache]: Analyzing trace with hash -808573359, now seen corresponding path program 1 times [2023-11-29 04:39:11,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:39:11,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125340873] [2023-11-29 04:39:11,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:39:11,461 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 04:39:11,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:39:11,462 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:11,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:11,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 04:39:11,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:11,596 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 04:39:11,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,616 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 04:39:11,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:39:11,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,629 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 04:39:11,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,636 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 04:39:11,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,643 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 04:39:11,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,654 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 13 treesize of output 1 [2023-11-29 04:39:11,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,661 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 04:39:11,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,682 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 04:39:11,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,692 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 04:39:11,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:39:11,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,708 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 8 treesize of output 1 [2023-11-29 04:39:11,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,730 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 04:39:11,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,740 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 04:39:11,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,763 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 04:39:11,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,793 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 04:39:11,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,813 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 04:39:11,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,825 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 04:39:11,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,839 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 04:39:11,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,846 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 04:39:11,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,854 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 04:39:11,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,864 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 04:39:11,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,884 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 04:39:11,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:11,895 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 04:39:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:39:12,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:39:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:39:14,685 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:39:14,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125340873] [2023-11-29 04:39:14,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125340873] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:39:14,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:39:14,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 04:39:14,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240600682] [2023-11-29 04:39:14,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:39:14,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:39:14,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:39:14,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:39:14,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:39:17,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2023-11-29 04:39:17,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 74 transitions, 347 flow. Second operand has 14 states, 14 states have (on average 35.714285714285715) internal successors, (500), 14 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 04:39:17,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:39:17,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2023-11-29 04:39:17,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:39:20,935 INFO L124 PetriNetUnfolderBase]: 989/1871 cut-off events. [2023-11-29 04:39:20,935 INFO L125 PetriNetUnfolderBase]: For 767/782 co-relation queries the response was YES. [2023-11-29 04:39:20,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4238 conditions, 1871 events. 989/1871 cut-off events. For 767/782 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 9993 event pairs, 370 based on Foata normal form. 9/1815 useless extension candidates. Maximal degree in co-relation 4210. Up to 373 conditions per place. [2023-11-29 04:39:20,946 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 111 selfloop transitions, 30 changer transitions 0/155 dead transitions. [2023-11-29 04:39:20,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 155 transitions, 858 flow [2023-11-29 04:39:20,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 04:39:20,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 04:39:20,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 591 transitions. [2023-11-29 04:39:20,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118012422360248 [2023-11-29 04:39:20,951 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 591 transitions. [2023-11-29 04:39:20,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 591 transitions. [2023-11-29 04:39:20,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:39:20,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 591 transitions. [2023-11-29 04:39:20,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 42.214285714285715) internal successors, (591), 14 states have internal predecessors, (591), 0 states have call successors, (0), 0 states 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 04:39:20,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 69.0) internal successors, (1035), 15 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states 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 04:39:20,956 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 69.0) internal successors, (1035), 15 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states 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 04:39:20,956 INFO L175 Difference]: Start difference. First operand has 93 places, 74 transitions, 347 flow. Second operand 14 states and 591 transitions. [2023-11-29 04:39:20,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 155 transitions, 858 flow [2023-11-29 04:39:20,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 155 transitions, 832 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-29 04:39:20,963 INFO L231 Difference]: Finished difference. Result has 107 places, 83 transitions, 473 flow [2023-11-29 04:39:20,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=473, PETRI_PLACES=107, PETRI_TRANSITIONS=83} [2023-11-29 04:39:20,963 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 35 predicate places. [2023-11-29 04:39:20,963 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 83 transitions, 473 flow [2023-11-29 04:39:20,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 35.714285714285715) internal successors, (500), 14 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 04:39:20,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:39:20,964 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2023-11-29 04:39:20,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:21,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:21,165 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:39:21,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:21,165 INFO L85 PathProgramCache]: Analyzing trace with hash 382521497, now seen corresponding path program 3 times [2023-11-29 04:39:21,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:39:21,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800072428] [2023-11-29 04:39:21,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:39:21,166 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 04:39:21,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:39:21,166 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:21,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:39:21,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 04:39:21,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:39:21,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 04:39:21,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:21,482 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 04:39:21,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,491 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 04:39:21,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,511 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 04:39:21,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,523 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 04:39:21,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,529 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 04:39:21,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,538 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 04:39:21,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,546 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 04:39:21,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,554 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 04:39:21,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,563 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 04:39:21,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,569 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 04:39:21,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,579 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 04:39:21,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,596 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 04:39:21,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,607 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 04:39:21,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,614 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 04:39:21,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,623 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 04:39:21,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,628 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 04:39:21,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,637 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 04:39:21,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,652 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 04:39:21,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,678 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 04:39:21,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,695 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 04:39:21,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,713 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 04:39:21,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,722 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 04:39:21,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,732 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 04:39:21,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:21,749 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 04:39:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:39:22,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:39:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:39:25,083 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:39:25,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800072428] [2023-11-29 04:39:25,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800072428] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:39:25,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:39:25,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-11-29 04:39:25,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126028663] [2023-11-29 04:39:25,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:39:25,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 04:39:25,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:39:25,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 04:39:25,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:39:36,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 69 [2023-11-29 04:39:36,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 83 transitions, 473 flow. Second operand has 26 states, 26 states have (on average 37.76923076923077) internal successors, (982), 26 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 04:39:36,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:39:36,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 69 [2023-11-29 04:39:36,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:40:05,689 INFO L124 PetriNetUnfolderBase]: 904/1804 cut-off events. [2023-11-29 04:40:05,689 INFO L125 PetriNetUnfolderBase]: For 1450/1464 co-relation queries the response was YES. [2023-11-29 04:40:05,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4320 conditions, 1804 events. 904/1804 cut-off events. For 1450/1464 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 10101 event pairs, 672 based on Foata normal form. 14/1753 useless extension candidates. Maximal degree in co-relation 4289. Up to 1449 conditions per place. [2023-11-29 04:40:05,696 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 36 selfloop transitions, 65 changer transitions 0/119 dead transitions. [2023-11-29 04:40:05,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 119 transitions, 987 flow [2023-11-29 04:40:05,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 04:40:05,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-29 04:40:05,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 1759 transitions. [2023-11-29 04:40:05,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541902961562697 [2023-11-29 04:40:05,703 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 1759 transitions. [2023-11-29 04:40:05,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 1759 transitions. [2023-11-29 04:40:05,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:40:05,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 1759 transitions. [2023-11-29 04:40:05,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 38.23913043478261) internal successors, (1759), 46 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states 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 04:40:05,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 69.0) internal successors, (3243), 47 states have internal predecessors, (3243), 0 states have call successors, (0), 0 states 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 04:40:05,716 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 69.0) internal successors, (3243), 47 states have internal predecessors, (3243), 0 states have call successors, (0), 0 states 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 04:40:05,716 INFO L175 Difference]: Start difference. First operand has 107 places, 83 transitions, 473 flow. Second operand 46 states and 1759 transitions. [2023-11-29 04:40:05,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 119 transitions, 987 flow [2023-11-29 04:40:05,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 119 transitions, 934 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 04:40:05,727 INFO L231 Difference]: Finished difference. Result has 158 places, 119 transitions, 916 flow [2023-11-29 04:40:05,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=916, PETRI_PLACES=158, PETRI_TRANSITIONS=119} [2023-11-29 04:40:05,728 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 86 predicate places. [2023-11-29 04:40:05,728 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 119 transitions, 916 flow [2023-11-29 04:40:05,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 37.76923076923077) internal successors, (982), 26 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 04:40:05,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:40:05,729 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:40:05,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:40:05,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:40:05,933 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:40:05,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:40:05,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1413401869, now seen corresponding path program 1 times [2023-11-29 04:40:05,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:40:05,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178286187] [2023-11-29 04:40:05,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:40:05,934 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 04:40:05,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:40:05,935 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:40:05,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:40:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:06,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 04:40:06,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:40:06,087 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 04:40:06,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,098 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 04:40:06,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,106 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 04:40:06,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,115 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 04:40:06,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,137 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 04:40:06,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,146 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 04:40:06,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,158 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 04:40:06,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,177 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 04:40:06,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,184 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 8 treesize of output 1 [2023-11-29 04:40:06,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,194 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 04:40:06,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,205 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 04:40:06,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,212 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 04:40:06,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,226 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 04:40:06,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,246 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 04:40:06,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,258 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 04:40:06,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,277 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 04:40:06,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,297 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 18 treesize of output 1 [2023-11-29 04:40:06,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,327 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 04:40:06,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,340 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 04:40:06,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,358 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 04:40:06,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,368 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 04:40:06,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,375 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 04:40:06,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,385 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 04:40:06,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:06,392 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 04:40:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:40:07,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:40:09,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:40:09,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:40:09,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178286187] [2023-11-29 04:40:09,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178286187] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:40:09,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:40:09,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-11-29 04:40:09,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276141088] [2023-11-29 04:40:09,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:40:09,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:40:09,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:40:09,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:40:09,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:40:16,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 69 [2023-11-29 04:40:16,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 119 transitions, 916 flow. Second operand has 16 states, 16 states have (on average 36.625) internal successors, (586), 16 states have internal predecessors, (586), 0 states have call successors, (0), 0 states 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 04:40:16,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:40:16,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 69 [2023-11-29 04:40:16,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:40:21,645 INFO L124 PetriNetUnfolderBase]: 1170/2319 cut-off events. [2023-11-29 04:40:21,645 INFO L125 PetriNetUnfolderBase]: For 1367/1376 co-relation queries the response was YES. [2023-11-29 04:40:21,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5544 conditions, 2319 events. 1170/2319 cut-off events. For 1367/1376 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 13298 event pairs, 615 based on Foata normal form. 24/2285 useless extension candidates. Maximal degree in co-relation 5501. Up to 698 conditions per place. [2023-11-29 04:40:21,656 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 129 selfloop transitions, 54 changer transitions 0/199 dead transitions. [2023-11-29 04:40:21,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 199 transitions, 1516 flow [2023-11-29 04:40:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 04:40:21,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 04:40:21,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 676 transitions. [2023-11-29 04:40:21,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6123188405797102 [2023-11-29 04:40:21,659 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 676 transitions. [2023-11-29 04:40:21,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 676 transitions. [2023-11-29 04:40:21,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:40:21,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 676 transitions. [2023-11-29 04:40:21,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 42.25) internal successors, (676), 16 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 04:40:21,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 69.0) internal successors, (1173), 17 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states 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 04:40:21,662 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 69.0) internal successors, (1173), 17 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states 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 04:40:21,662 INFO L175 Difference]: Start difference. First operand has 158 places, 119 transitions, 916 flow. Second operand 16 states and 676 transitions. [2023-11-29 04:40:21,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 199 transitions, 1516 flow [2023-11-29 04:40:21,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 199 transitions, 1356 flow, removed 51 selfloop flow, removed 21 redundant places. [2023-11-29 04:40:21,674 INFO L231 Difference]: Finished difference. Result has 156 places, 126 transitions, 966 flow [2023-11-29 04:40:21,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=966, PETRI_PLACES=156, PETRI_TRANSITIONS=126} [2023-11-29 04:40:21,675 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 84 predicate places. [2023-11-29 04:40:21,675 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 126 transitions, 966 flow [2023-11-29 04:40:21,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 36.625) internal successors, (586), 16 states have internal predecessors, (586), 0 states have call successors, (0), 0 states 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 04:40:21,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:40:21,675 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:40:21,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:40:21,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:40:21,876 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:40:21,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:40:21,876 INFO L85 PathProgramCache]: Analyzing trace with hash 162168535, now seen corresponding path program 2 times [2023-11-29 04:40:21,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:40:21,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729660199] [2023-11-29 04:40:21,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:40:21,877 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 04:40:21,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:40:21,878 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:40:21,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:40:22,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 04:40:22,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:40:22,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:40:22,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:40:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 04:40:22,352 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:40:22,353 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:40:22,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729660199] [2023-11-29 04:40:22,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729660199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:40:22,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:40:22,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:40:22,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379580708] [2023-11-29 04:40:22,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:40:22,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:40:22,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:40:22,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:40:22,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:40:22,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 69 [2023-11-29 04:40:22,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 126 transitions, 966 flow. Second operand has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states 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 04:40:22,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:40:22,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 69 [2023-11-29 04:40:22,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:40:23,327 INFO L124 PetriNetUnfolderBase]: 1186/2229 cut-off events. [2023-11-29 04:40:23,327 INFO L125 PetriNetUnfolderBase]: For 2034/2047 co-relation queries the response was YES. [2023-11-29 04:40:23,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5722 conditions, 2229 events. 1186/2229 cut-off events. For 2034/2047 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 12301 event pairs, 414 based on Foata normal form. 28/2192 useless extension candidates. Maximal degree in co-relation 5675. Up to 1327 conditions per place. [2023-11-29 04:40:23,341 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 88 selfloop transitions, 32 changer transitions 0/136 dead transitions. [2023-11-29 04:40:23,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 136 transitions, 1224 flow [2023-11-29 04:40:23,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:40:23,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 04:40:23,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 216 transitions. [2023-11-29 04:40:23,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260869565217392 [2023-11-29 04:40:23,343 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 216 transitions. [2023-11-29 04:40:23,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 216 transitions. [2023-11-29 04:40:23,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:40:23,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 216 transitions. [2023-11-29 04:40:23,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 43.2) internal successors, (216), 5 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 04:40:23,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 04:40:23,345 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 04:40:23,345 INFO L175 Difference]: Start difference. First operand has 156 places, 126 transitions, 966 flow. Second operand 5 states and 216 transitions. [2023-11-29 04:40:23,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 136 transitions, 1224 flow [2023-11-29 04:40:23,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 136 transitions, 1200 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-11-29 04:40:23,376 INFO L231 Difference]: Finished difference. Result has 151 places, 125 transitions, 1000 flow [2023-11-29 04:40:23,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1000, PETRI_PLACES=151, PETRI_TRANSITIONS=125} [2023-11-29 04:40:23,377 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 79 predicate places. [2023-11-29 04:40:23,377 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 125 transitions, 1000 flow [2023-11-29 04:40:23,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states 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 04:40:23,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:40:23,377 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:40:23,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:40:23,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:40:23,579 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:40:23,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:40:23,579 INFO L85 PathProgramCache]: Analyzing trace with hash 858136424, now seen corresponding path program 2 times [2023-11-29 04:40:23,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:40:23,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739622158] [2023-11-29 04:40:23,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:40:23,579 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 04:40:23,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:40:23,580 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:40:23,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:40:23,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 04:40:23,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:40:23,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 04:40:23,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:40:23,751 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 04:40:23,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 04:40:23,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,790 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 04:40:23,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,798 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 04:40:23,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,817 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 04:40:23,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,825 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 04:40:23,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,832 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 04:40:23,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,839 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 04:40:23,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,847 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 04:40:23,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,852 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 04:40:23,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,872 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 04:40:23,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,881 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 04:40:23,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,892 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 04:40:23,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,898 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 04:40:23,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,905 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 04:40:23,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,914 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 04:40:23,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,934 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 04:40:23,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,943 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 04:40:23,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,963 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 04:40:23,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,972 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 04:40:23,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,980 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 04:40:23,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:23,997 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 04:40:24,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:24,004 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 04:40:24,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:24,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:40:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-29 04:40:24,880 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:40:24,880 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:40:24,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739622158] [2023-11-29 04:40:24,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739622158] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:40:24,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:40:24,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:40:24,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437625753] [2023-11-29 04:40:24,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:40:24,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:40:24,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:40:24,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:40:24,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:40:26,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 69 [2023-11-29 04:40:26,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 125 transitions, 1000 flow. Second operand has 7 states, 7 states have (on average 36.57142857142857) internal successors, (256), 7 states have internal predecessors, (256), 0 states have call successors, (0), 0 states 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 04:40:26,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:40:26,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 69 [2023-11-29 04:40:26,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:40:27,692 INFO L124 PetriNetUnfolderBase]: 1186/2204 cut-off events. [2023-11-29 04:40:27,692 INFO L125 PetriNetUnfolderBase]: For 2397/2413 co-relation queries the response was YES. [2023-11-29 04:40:27,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5798 conditions, 2204 events. 1186/2204 cut-off events. For 2397/2413 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 11967 event pairs, 220 based on Foata normal form. 20/2163 useless extension candidates. Maximal degree in co-relation 5751. Up to 730 conditions per place. [2023-11-29 04:40:27,702 INFO L140 encePairwiseOnDemand]: 63/69 looper letters, 90 selfloop transitions, 41 changer transitions 0/146 dead transitions. [2023-11-29 04:40:27,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 146 transitions, 1304 flow [2023-11-29 04:40:27,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:40:27,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:40:27,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 290 transitions. [2023-11-29 04:40:27,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6004140786749482 [2023-11-29 04:40:27,704 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 290 transitions. [2023-11-29 04:40:27,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 290 transitions. [2023-11-29 04:40:27,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:40:27,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 290 transitions. [2023-11-29 04:40:27,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 41.42857142857143) internal successors, (290), 7 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 04:40:27,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 69.0) internal successors, (552), 8 states have internal predecessors, (552), 0 states have call successors, (0), 0 states 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 04:40:27,706 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 69.0) internal successors, (552), 8 states have internal predecessors, (552), 0 states have call successors, (0), 0 states 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 04:40:27,706 INFO L175 Difference]: Start difference. First operand has 151 places, 125 transitions, 1000 flow. Second operand 7 states and 290 transitions. [2023-11-29 04:40:27,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 146 transitions, 1304 flow [2023-11-29 04:40:27,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 146 transitions, 1265 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 04:40:27,718 INFO L231 Difference]: Finished difference. Result has 150 places, 124 transitions, 1035 flow [2023-11-29 04:40:27,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1035, PETRI_PLACES=150, PETRI_TRANSITIONS=124} [2023-11-29 04:40:27,718 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 78 predicate places. [2023-11-29 04:40:27,719 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 124 transitions, 1035 flow [2023-11-29 04:40:27,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 36.57142857142857) internal successors, (256), 7 states have internal predecessors, (256), 0 states have call successors, (0), 0 states 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 04:40:27,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:40:27,719 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:40:27,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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)] Ended with exit code 0 [2023-11-29 04:40:27,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:40:27,920 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-11-29 04:40:27,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:40:27,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1439235113, now seen corresponding path program 1 times [2023-11-29 04:40:27,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:40:27,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655186374] [2023-11-29 04:40:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:40:27,920 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 04:40:27,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:40:27,921 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 04:40:27,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e84da741-32c3-4ea8-813a-293eaa599e55/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 (23)] Waiting until timeout for monitored process [2023-11-29 04:40:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:28,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 04:40:28,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:40:28,121 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 04:40:28,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,131 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 04:40:28,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,139 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 04:40:28,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,154 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 04:40:28,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,160 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 04:40:28,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,167 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 04:40:28,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,174 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 04:40:28,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,184 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 04:40:28,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,204 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 04:40:28,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,214 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 04:40:28,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,222 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 04:40:28,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,244 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 04:40:28,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,256 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 04:40:28,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,276 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 04:40:28,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,306 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 04:40:28,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,325 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 04:40:28,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,335 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 04:40:28,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,353 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 04:40:28,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,366 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 04:40:28,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,386 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 04:40:28,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,394 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 04:40:28,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,403 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 04:40:28,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 04:40:28,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:40:28,420 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 04:40:28,549 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 13 treesize of output 9 [2023-11-29 04:40:29,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:40:29,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:40:31,315 INFO L349 Elim1Store]: treesize reduction 672, result has 23.7 percent of original size [2023-11-29 04:40:31,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 178 treesize of output 244