./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff 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_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:39:58,994 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:39:59,123 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:39:59,131 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:39:59,132 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:39:59,173 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:39:59,174 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:39:59,174 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:39:59,176 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:39:59,181 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:39:59,182 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:39:59,182 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:39:59,182 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:39:59,184 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:39:59,185 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:39:59,185 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:39:59,186 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:39:59,186 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:39:59,186 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:39:59,187 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:39:59,187 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:39:59,188 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:39:59,188 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:39:59,189 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:39:59,189 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:39:59,189 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:39:59,190 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:39:59,191 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:39:59,191 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:39:59,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:39:59,193 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:39:59,193 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:39:59,193 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:39:59,193 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:39:59,194 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:39:59,194 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:39:59,194 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:39:59,194 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:39:59,195 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_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e [2023-11-19 07:39:59,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:39:59,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:39:59,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:39:59,611 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:39:59,612 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:39:59,613 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2023-11-19 07:40:02,781 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:40:03,060 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:40:03,062 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2023-11-19 07:40:03,075 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/data/ae532e3fd/9c6db80b8f364de5a77bf991a6f21474/FLAG8d1e0ea3a [2023-11-19 07:40:03,098 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/data/ae532e3fd/9c6db80b8f364de5a77bf991a6f21474 [2023-11-19 07:40:03,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:40:03,108 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:40:03,112 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:03,113 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:40:03,118 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:40:03,119 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:03" (1/1) ... [2023-11-19 07:40:03,121 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50a7bd15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:03, skipping insertion in model container [2023-11-19 07:40:03,121 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:03" (1/1) ... [2023-11-19 07:40:03,156 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:40:03,435 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:03,451 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-19 07:40:03,452 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1a2c24b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:03, skipping insertion in model container [2023-11-19 07:40:03,453 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:03,453 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-19 07:40:03,456 INFO L158 Benchmark]: Toolchain (without parser) took 346.75ms. Allocated memory is still 130.0MB. Free memory was 86.0MB in the beginning and 76.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 07:40:03,456 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 130.0MB. Free memory is still 103.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:40:03,457 INFO L158 Benchmark]: CACSL2BoogieTranslator took 341.00ms. Allocated memory is still 130.0MB. Free memory was 86.0MB in the beginning and 76.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 07:40:03,459 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 130.0MB. Free memory is still 103.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 341.00ms. Allocated memory is still 130.0MB. Free memory was 86.0MB in the beginning and 76.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 107]: 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_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:40:06,034 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:40:06,167 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-19 07:40:06,176 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:40:06,197 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:40:06,242 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:40:06,243 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:40:06,243 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:40:06,244 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:40:06,249 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:40:06,250 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:40:06,251 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:40:06,252 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:40:06,254 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:40:06,254 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:40:06,255 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:40:06,255 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:40:06,256 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:40:06,256 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:40:06,257 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:40:06,257 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:40:06,258 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:40:06,258 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:40:06,259 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-19 07:40:06,260 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-19 07:40:06,260 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:40:06,261 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:40:06,261 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:40:06,262 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:40:06,263 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:40:06,264 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:40:06,265 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:06,265 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:40:06,266 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:40:06,266 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-19 07:40:06,266 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-19 07:40:06,267 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:40:06,267 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:40:06,267 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:40:06,268 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-19 07:40:06,269 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:40:06,269 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_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e [2023-11-19 07:40:06,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:40:06,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:40:06,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:40:06,771 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:40:06,771 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:40:06,773 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2023-11-19 07:40:10,131 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:40:10,416 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:40:10,417 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2023-11-19 07:40:10,425 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/data/0c8579caa/62119053ed694a88bbc89581625f5e50/FLAG802219c83 [2023-11-19 07:40:10,440 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/data/0c8579caa/62119053ed694a88bbc89581625f5e50 [2023-11-19 07:40:10,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:40:10,444 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:40:10,445 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:10,445 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:40:10,451 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:40:10,451 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:10" (1/1) ... [2023-11-19 07:40:10,452 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67b4f6c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:10, skipping insertion in model container [2023-11-19 07:40:10,453 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:10" (1/1) ... [2023-11-19 07:40:10,477 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:40:10,663 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:10,680 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-19 07:40:10,685 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:40:10,702 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:10,708 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:40:10,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:10,754 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:40:10,754 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:40:10,762 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:40:10,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:10 WrapperNode [2023-11-19 07:40:10,762 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:10,764 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:10,764 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:40:10,764 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:40:10,773 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:10" (1/1) ... [2023-11-19 07:40:10,799 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:10" (1/1) ... [2023-11-19 07:40:10,826 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 159 [2023-11-19 07:40:10,826 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:10,841 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:40:10,841 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:40:10,841 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:40:10,850 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:10" (1/1) ... [2023-11-19 07:40:10,870 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:10" (1/1) ... [2023-11-19 07:40:10,875 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:10" (1/1) ... [2023-11-19 07:40:10,876 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:10" (1/1) ... [2023-11-19 07:40:10,901 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:10" (1/1) ... [2023-11-19 07:40:10,907 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:10" (1/1) ... [2023-11-19 07:40:10,923 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:10" (1/1) ... [2023-11-19 07:40:10,936 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:10" (1/1) ... [2023-11-19 07:40:10,940 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:40:10,941 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:40:10,941 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:40:10,942 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:40:10,943 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:10" (1/1) ... [2023-11-19 07:40:10,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:10,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:10,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:40:11,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:40:11,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:40:11,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-19 07:40:11,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:40:11,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-19 07:40:11,042 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:40:11,042 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:40:11,042 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:40:11,042 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:40:11,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:40:11,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:40:11,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:40:11,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:40:11,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:40:11,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:40:11,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-19 07:40:11,049 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:40:11,220 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:40:11,223 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:40:11,742 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:40:11,888 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:40:11,888 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:40:11,892 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:11 BoogieIcfgContainer [2023-11-19 07:40:11,893 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:40:11,895 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:40:11,895 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:40:11,898 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:40:11,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:40:10" (1/3) ... [2023-11-19 07:40:11,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@321518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:11, skipping insertion in model container [2023-11-19 07:40:11,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:10" (2/3) ... [2023-11-19 07:40:11,900 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@321518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:11, skipping insertion in model container [2023-11-19 07:40:11,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:11" (3/3) ... [2023-11-19 07:40:11,901 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2023-11-19 07:40:11,920 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:40:11,921 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-19 07:40:11,921 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:40:12,000 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:40:12,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 159 transitions, 332 flow [2023-11-19 07:40:12,123 INFO L124 PetriNetUnfolderBase]: 11/157 cut-off events. [2023-11-19 07:40:12,123 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:40:12,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 157 events. 11/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 149 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 109. Up to 3 conditions per place. [2023-11-19 07:40:12,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 159 transitions, 332 flow [2023-11-19 07:40:12,143 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 152 transitions, 316 flow [2023-11-19 07:40:12,150 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:40:12,164 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 152 transitions, 316 flow [2023-11-19 07:40:12,169 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 152 transitions, 316 flow [2023-11-19 07:40:12,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 152 transitions, 316 flow [2023-11-19 07:40:12,226 INFO L124 PetriNetUnfolderBase]: 11/152 cut-off events. [2023-11-19 07:40:12,226 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:40:12,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 152 events. 11/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 147 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 109. Up to 3 conditions per place. [2023-11-19 07:40:12,229 INFO L119 LiptonReduction]: Number of co-enabled transitions 1144 [2023-11-19 07:40:31,038 INFO L134 LiptonReduction]: Checked pairs total: 1496 [2023-11-19 07:40:31,038 INFO L136 LiptonReduction]: Total number of compositions: 165 [2023-11-19 07:40:31,054 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:40:31,062 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;@73137b5f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:40:31,062 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-11-19 07:40:31,065 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:40:31,066 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-19 07:40:31,066 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:31,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:31,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:40:31,067 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:40:31,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:31,073 INFO L85 PathProgramCache]: Analyzing trace with hash 23086, now seen corresponding path program 1 times [2023-11-19 07:40:31,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:40:31,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739678644] [2023-11-19 07:40:31,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:31,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:31,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:40:31,096 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:40:31,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-19 07:40:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:31,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:40:31,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:31,362 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 [2023-11-19 07:40:31,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:31,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-19 07:40:31,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:31,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:40:31,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:31,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-19 07:40:31,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:31,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:40:31,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:31,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-19 07:40:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:31,489 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:31,490 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:40:31,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739678644] [2023-11-19 07:40:31,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739678644] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:31,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:31,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:40:31,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221779692] [2023-11-19 07:40:31,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:31,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:31,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:40:31,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:31,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:31,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 324 [2023-11-19 07:40:31,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:31,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:31,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 324 [2023-11-19 07:40:31,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:31,971 INFO L124 PetriNetUnfolderBase]: 298/496 cut-off events. [2023-11-19 07:40:31,972 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:40:31,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1018 conditions, 496 events. 298/496 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 1882 event pairs, 238 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 896. Up to 495 conditions per place. [2023-11-19 07:40:31,980 INFO L140 encePairwiseOnDemand]: 317/324 looper letters, 33 selfloop transitions, 5 changer transitions 0/38 dead transitions. [2023-11-19 07:40:31,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 164 flow [2023-11-19 07:40:32,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:32,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:40:32,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 427 transitions. [2023-11-19 07:40:32,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43930041152263377 [2023-11-19 07:40:32,028 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 427 transitions. [2023-11-19 07:40:32,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 427 transitions. [2023-11-19 07:40:32,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:32,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 427 transitions. [2023-11-19 07:40:32,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:32,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:32,054 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:32,056 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 80 flow. Second operand 3 states and 427 transitions. [2023-11-19 07:40:32,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 164 flow [2023-11-19 07:40:32,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 38 transitions, 156 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:40:32,065 INFO L231 Difference]: Finished difference. Result has 36 places, 37 transitions, 103 flow [2023-11-19 07:40:32,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=36, PETRI_TRANSITIONS=37} [2023-11-19 07:40:32,071 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-11-19 07:40:32,072 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 103 flow [2023-11-19 07:40:32,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:32,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:32,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:40:32,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:32,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:32,276 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:40:32,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:32,277 INFO L85 PathProgramCache]: Analyzing trace with hash 23140, now seen corresponding path program 1 times [2023-11-19 07:40:32,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:40:32,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100961222] [2023-11-19 07:40:32,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:32,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:32,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:40:32,280 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:40:32,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-19 07:40:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:32,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:40:32,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:32,433 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-19 07:40:32,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-19 07:40:32,485 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:40:32,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-19 07:40:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:32,532 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:32,533 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:40:32,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100961222] [2023-11-19 07:40:32,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100961222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:32,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:32,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:40:32,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165486968] [2023-11-19 07:40:32,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:32,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:32,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:40:32,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:32,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:32,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 324 [2023-11-19 07:40:32,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 37 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:32,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:32,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 324 [2023-11-19 07:40:32,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:32,925 INFO L124 PetriNetUnfolderBase]: 227/389 cut-off events. [2023-11-19 07:40:32,925 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:40:32,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 801 conditions, 389 events. 227/389 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1399 event pairs, 180 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 766. Up to 389 conditions per place. [2023-11-19 07:40:32,929 INFO L140 encePairwiseOnDemand]: 321/324 looper letters, 33 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-11-19 07:40:32,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 34 transitions, 160 flow [2023-11-19 07:40:32,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:32,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:40:32,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-11-19 07:40:32,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2023-11-19 07:40:32,933 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-11-19 07:40:32,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-11-19 07:40:32,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:32,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-11-19 07:40:32,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 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) [2023-11-19 07:40:32,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:32,939 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:32,939 INFO L175 Difference]: Start difference. First operand has 36 places, 37 transitions, 103 flow. Second operand 3 states and 414 transitions. [2023-11-19 07:40:32,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 34 transitions, 160 flow [2023-11-19 07:40:32,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:40:32,941 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 90 flow [2023-11-19 07:40:32,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2023-11-19 07:40:32,942 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-11-19 07:40:32,943 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 90 flow [2023-11-19 07:40:32,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:32,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:32,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:40:32,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:33,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:33,146 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:40:33,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:33,147 INFO L85 PathProgramCache]: Analyzing trace with hash 23139, now seen corresponding path program 1 times [2023-11-19 07:40:33,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:40:33,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305326937] [2023-11-19 07:40:33,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:33,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:33,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:40:33,159 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:40:33,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-19 07:40:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:33,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:40:33,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:33,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:33,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:33,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-19 07:40:33,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 07:40:33,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:33,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-19 07:40:33,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:33,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 07:40:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:33,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:33,399 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:40:33,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305326937] [2023-11-19 07:40:33,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305326937] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:33,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:33,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:40:33,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829185994] [2023-11-19 07:40:33,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:33,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:33,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:40:33,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:33,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:33,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-11-19 07:40:33,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:33,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:33,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-11-19 07:40:33,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:33,747 INFO L124 PetriNetUnfolderBase]: 156/282 cut-off events. [2023-11-19 07:40:33,748 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:40:33,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 282 events. 156/282 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 975 event pairs, 122 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 575. Up to 282 conditions per place. [2023-11-19 07:40:33,751 INFO L140 encePairwiseOnDemand]: 321/324 looper letters, 30 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-11-19 07:40:33,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 31 transitions, 142 flow [2023-11-19 07:40:33,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:33,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:40:33,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2023-11-19 07:40:33,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331275720164609 [2023-11-19 07:40:33,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2023-11-19 07:40:33,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2023-11-19 07:40:33,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:33,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2023-11-19 07:40:33,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:33,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:33,761 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:33,761 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 90 flow. Second operand 3 states and 421 transitions. [2023-11-19 07:40:33,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 31 transitions, 142 flow [2023-11-19 07:40:33,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 31 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:40:33,763 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 81 flow [2023-11-19 07:40:33,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-11-19 07:40:33,764 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-11-19 07:40:33,765 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 81 flow [2023-11-19 07:40:33,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:33,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:33,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:40:33,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:33,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:33,969 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:40:33,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:33,969 INFO L85 PathProgramCache]: Analyzing trace with hash 23085, now seen corresponding path program 1 times [2023-11-19 07:40:33,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:40:33,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420182300] [2023-11-19 07:40:33,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:33,970 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:33,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:40:33,973 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:40:33,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-19 07:40:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:34,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:40:34,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:34,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 07:40:34,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:34,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-19 07:40:34,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:34,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-19 07:40:34,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:34,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-19 07:40:34,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:34,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-19 07:40:34,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:34,129 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 11 treesize of output 1 [2023-11-19 07:40:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:34,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:34,135 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:40:34,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420182300] [2023-11-19 07:40:34,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420182300] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:34,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:34,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:40:34,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332462497] [2023-11-19 07:40:34,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:34,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:34,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:40:34,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:34,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:34,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-11-19 07:40:34,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:34,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:34,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-11-19 07:40:34,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:34,477 INFO L124 PetriNetUnfolderBase]: 156/280 cut-off events. [2023-11-19 07:40:34,477 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:40:34,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580 conditions, 280 events. 156/280 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 947 event pairs, 122 based on Foata normal form. 2/131 useless extension candidates. Maximal degree in co-relation 571. Up to 277 conditions per place. [2023-11-19 07:40:34,480 INFO L140 encePairwiseOnDemand]: 321/324 looper letters, 27 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2023-11-19 07:40:34,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 139 flow [2023-11-19 07:40:34,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:40:34,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 419 transitions. [2023-11-19 07:40:34,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43106995884773663 [2023-11-19 07:40:34,484 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 419 transitions. [2023-11-19 07:40:34,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 419 transitions. [2023-11-19 07:40:34,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:34,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 419 transitions. [2023-11-19 07:40:34,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:34,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:34,491 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:34,491 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 81 flow. Second operand 3 states and 419 transitions. [2023-11-19 07:40:34,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 139 flow [2023-11-19 07:40:34,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 136 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:40:34,493 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 82 flow [2023-11-19 07:40:34,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-11-19 07:40:34,494 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-11-19 07:40:34,495 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 82 flow [2023-11-19 07:40:34,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:34,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:34,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:40:34,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:34,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:34,698 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:40:34,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:34,699 INFO L85 PathProgramCache]: Analyzing trace with hash 716897, now seen corresponding path program 1 times [2023-11-19 07:40:34,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:40:34,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686761495] [2023-11-19 07:40:34,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:34,699 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:34,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:40:34,701 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:40:34,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-19 07:40:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:34,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:40:34,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:34,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 07:40:34,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:34,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-19 07:40:34,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:34,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-19 07:40:34,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:34,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-19 07:40:34,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:34,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-19 07:40:34,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:34,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:40:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:34,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:35,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:40:35,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686761495] [2023-11-19 07:40:35,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686761495] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:35,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:35,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-19 07:40:35,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918026746] [2023-11-19 07:40:35,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:35,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:40:35,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:40:35,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:40:35,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:40:35,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 324 [2023-11-19 07:40:35,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 82 flow. Second operand has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:35,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:35,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 324 [2023-11-19 07:40:35,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:36,567 INFO L124 PetriNetUnfolderBase]: 159/286 cut-off events. [2023-11-19 07:40:36,568 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-19 07:40:36,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 603 conditions, 286 events. 159/286 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 998 event pairs, 122 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 593. Up to 283 conditions per place. [2023-11-19 07:40:36,571 INFO L140 encePairwiseOnDemand]: 320/324 looper letters, 27 selfloop transitions, 9 changer transitions 0/36 dead transitions. [2023-11-19 07:40:36,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 36 transitions, 184 flow [2023-11-19 07:40:36,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:40:36,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:40:36,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 783 transitions. [2023-11-19 07:40:36,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2023-11-19 07:40:36,576 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 783 transitions. [2023-11-19 07:40:36,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 783 transitions. [2023-11-19 07:40:36,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:36,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 783 transitions. [2023-11-19 07:40:36,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 130.5) internal successors, (783), 6 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:36,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:36,586 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:36,587 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 82 flow. Second operand 6 states and 783 transitions. [2023-11-19 07:40:36,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 36 transitions, 184 flow [2023-11-19 07:40:36,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:40:36,589 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 137 flow [2023-11-19 07:40:36,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=137, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-11-19 07:40:36,590 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-11-19 07:40:36,591 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 137 flow [2023-11-19 07:40:36,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:36,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:36,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:40:36,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-19 07:40:36,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:36,795 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:40:36,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:36,796 INFO L85 PathProgramCache]: Analyzing trace with hash 22252606, now seen corresponding path program 1 times [2023-11-19 07:40:36,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:40:36,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026898689] [2023-11-19 07:40:36,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:36,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:36,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:40:36,798 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:40:36,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-19 07:40:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:36,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:40:36,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:36,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:36,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-19 07:40:36,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:36,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 07:40:36,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:36,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:36,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-19 07:40:36,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:36,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:36,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-19 07:40:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:37,001 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:37,001 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:40:37,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026898689] [2023-11-19 07:40:37,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026898689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:37,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:37,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:40:37,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056132603] [2023-11-19 07:40:37,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:37,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:37,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:40:37,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:37,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:37,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-11-19 07:40:37,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:37,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:37,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-11-19 07:40:37,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:37,304 INFO L124 PetriNetUnfolderBase]: 147/262 cut-off events. [2023-11-19 07:40:37,305 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:40:37,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 262 events. 147/262 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 885 event pairs, 112 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 559. Up to 262 conditions per place. [2023-11-19 07:40:37,308 INFO L140 encePairwiseOnDemand]: 321/324 looper letters, 33 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-11-19 07:40:37,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 201 flow [2023-11-19 07:40:37,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:37,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:40:37,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-11-19 07:40:37,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43004115226337447 [2023-11-19 07:40:37,311 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-11-19 07:40:37,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-11-19 07:40:37,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:37,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-11-19 07:40:37,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:37,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:37,317 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:37,318 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 137 flow. Second operand 3 states and 418 transitions. [2023-11-19 07:40:37,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 201 flow [2023-11-19 07:40:37,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 180 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-19 07:40:37,321 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 114 flow [2023-11-19 07:40:37,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2023-11-19 07:40:37,322 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-11-19 07:40:37,322 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 114 flow [2023-11-19 07:40:37,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:37,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:37,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:40:37,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-19 07:40:37,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:37,526 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:40:37,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:37,526 INFO L85 PathProgramCache]: Analyzing trace with hash 22252604, now seen corresponding path program 1 times [2023-11-19 07:40:37,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:40:37,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102992138] [2023-11-19 07:40:37,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:37,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:37,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:40:37,530 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:40:37,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-19 07:40:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:37,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:40:37,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:37,624 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:40:37,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-19 07:40:37,655 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:40:37,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-19 07:40:37,695 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 07:40:37,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-19 07:40:37,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:37,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:37,787 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:40:37,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102992138] [2023-11-19 07:40:37,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102992138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:37,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:37,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:40:37,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801666607] [2023-11-19 07:40:37,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:37,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:37,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:40:37,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:37,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:37,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 324 [2023-11-19 07:40:37,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:37,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:37,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 324 [2023-11-19 07:40:37,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:38,123 INFO L124 PetriNetUnfolderBase]: 135/238 cut-off events. [2023-11-19 07:40:38,124 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-19 07:40:38,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 238 events. 135/238 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 770 event pairs, 102 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 502. Up to 238 conditions per place. [2023-11-19 07:40:38,126 INFO L140 encePairwiseOnDemand]: 321/324 looper letters, 31 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-11-19 07:40:38,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 32 transitions, 174 flow [2023-11-19 07:40:38,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:38,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:40:38,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-11-19 07:40:38,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41872427983539096 [2023-11-19 07:40:38,129 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-11-19 07:40:38,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-11-19 07:40:38,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:38,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-11-19 07:40:38,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:38,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:38,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:38,156 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 114 flow. Second operand 3 states and 407 transitions. [2023-11-19 07:40:38,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 32 transitions, 174 flow [2023-11-19 07:40:38,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 32 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:40:38,158 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 111 flow [2023-11-19 07:40:38,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-11-19 07:40:38,159 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-11-19 07:40:38,159 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 111 flow [2023-11-19 07:40:38,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:38,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:38,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:40:38,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-11-19 07:40:38,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:38,360 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:40:38,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:38,361 INFO L85 PathProgramCache]: Analyzing trace with hash 689827764, now seen corresponding path program 1 times [2023-11-19 07:40:38,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:40:38,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565417525] [2023-11-19 07:40:38,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:38,362 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:38,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:40:38,363 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:40:38,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-19 07:40:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:38,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:40:38,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:38,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-19 07:40:38,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:38,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-19 07:40:38,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:38,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-19 07:40:38,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:38,482 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 6 treesize of output 1 [2023-11-19 07:40:38,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:38,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-19 07:40:38,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:38,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-19 07:40:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:38,519 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:38,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:40:38,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565417525] [2023-11-19 07:40:38,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565417525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:38,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:38,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:40:38,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634324452] [2023-11-19 07:40:38,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:38,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:40:38,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:40:38,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:40:38,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:40:38,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 324 [2023-11-19 07:40:38,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 111 flow. Second operand has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:38,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:38,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 324 [2023-11-19 07:40:38,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:38,863 INFO L124 PetriNetUnfolderBase]: 84/151 cut-off events. [2023-11-19 07:40:38,864 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-19 07:40:38,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 151 events. 84/151 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 402 event pairs, 57 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 326. Up to 144 conditions per place. [2023-11-19 07:40:38,866 INFO L140 encePairwiseOnDemand]: 319/324 looper letters, 23 selfloop transitions, 6 changer transitions 0/29 dead transitions. [2023-11-19 07:40:38,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 29 transitions, 163 flow [2023-11-19 07:40:38,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:40:38,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:40:38,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 536 transitions. [2023-11-19 07:40:38,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41358024691358025 [2023-11-19 07:40:38,871 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 536 transitions. [2023-11-19 07:40:38,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 536 transitions. [2023-11-19 07:40:38,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:38,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 536 transitions. [2023-11-19 07:40:38,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:38,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:38,877 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:38,877 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 111 flow. Second operand 4 states and 536 transitions. [2023-11-19 07:40:38,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 29 transitions, 163 flow [2023-11-19 07:40:38,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 29 transitions, 162 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:40:38,883 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 116 flow [2023-11-19 07:40:38,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-11-19 07:40:38,887 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-11-19 07:40:38,888 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 116 flow [2023-11-19 07:40:38,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:38,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:38,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:40:38,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:39,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:39,093 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:40:39,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:39,093 INFO L85 PathProgramCache]: Analyzing trace with hash 689827868, now seen corresponding path program 1 times [2023-11-19 07:40:39,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:40:39,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746799245] [2023-11-19 07:40:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:39,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:39,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:40:39,095 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:40:39,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-19 07:40:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:39,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:40:39,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:39,218 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:39,218 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:40:39,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746799245] [2023-11-19 07:40:39,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746799245] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:39,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:39,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:40:39,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578610315] [2023-11-19 07:40:39,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:39,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:40:39,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:40:39,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:40:39,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:40:39,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 324 [2023-11-19 07:40:39,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 130.25) internal successors, (521), 4 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:39,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:39,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 324 [2023-11-19 07:40:39,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:39,587 INFO L124 PetriNetUnfolderBase]: 90/170 cut-off events. [2023-11-19 07:40:39,587 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:40:39,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 170 events. 90/170 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 475 event pairs, 64 based on Foata normal form. 10/126 useless extension candidates. Maximal degree in co-relation 372. Up to 150 conditions per place. [2023-11-19 07:40:39,589 INFO L140 encePairwiseOnDemand]: 314/324 looper letters, 26 selfloop transitions, 2 changer transitions 7/35 dead transitions. [2023-11-19 07:40:39,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 200 flow [2023-11-19 07:40:39,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:40:39,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:40:39,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 552 transitions. [2023-11-19 07:40:39,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2023-11-19 07:40:39,592 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 552 transitions. [2023-11-19 07:40:39,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 552 transitions. [2023-11-19 07:40:39,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:39,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 552 transitions. [2023-11-19 07:40:39,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.0) internal successors, (552), 4 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) [2023-11-19 07:40:39,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:39,599 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:39,599 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 116 flow. Second operand 4 states and 552 transitions. [2023-11-19 07:40:39,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 200 flow [2023-11-19 07:40:39,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 193 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:40:39,601 INFO L231 Difference]: Finished difference. Result has 39 places, 28 transitions, 121 flow [2023-11-19 07:40:39,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=39, PETRI_TRANSITIONS=28} [2023-11-19 07:40:39,602 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-11-19 07:40:39,603 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 28 transitions, 121 flow [2023-11-19 07:40:39,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.25) internal successors, (521), 4 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:39,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:39,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:40:39,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:39,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:39,806 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:40:39,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:39,806 INFO L85 PathProgramCache]: Analyzing trace with hash -115685111, now seen corresponding path program 1 times [2023-11-19 07:40:39,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:40:39,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864439510] [2023-11-19 07:40:39,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:39,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:39,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:40:39,808 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:40:39,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-19 07:40:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:39,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:40:39,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:39,926 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 [2023-11-19 07:40:39,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:39,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-19 07:40:39,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:39,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:40:39,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:39,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-19 07:40:40,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:40,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-19 07:40:40,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:40,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:40:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:40,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:40,788 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:40:40,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864439510] [2023-11-19 07:40:40,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864439510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:40,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:40,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-19 07:40:40,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98850609] [2023-11-19 07:40:40,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:40,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:40:40,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:40:40,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:40:40,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:40:42,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 324 [2023-11-19 07:40:42,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 121 flow. Second operand has 8 states, 8 states have (on average 121.5) internal successors, (972), 8 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:42,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:42,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 324 [2023-11-19 07:40:42,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:43,960 INFO L124 PetriNetUnfolderBase]: 161/294 cut-off events. [2023-11-19 07:40:43,960 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-11-19 07:40:43,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 294 events. 161/294 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 929 event pairs, 105 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 763. Up to 143 conditions per place. [2023-11-19 07:40:43,963 INFO L140 encePairwiseOnDemand]: 317/324 looper letters, 47 selfloop transitions, 9 changer transitions 0/56 dead transitions. [2023-11-19 07:40:43,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 313 flow [2023-11-19 07:40:43,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:40:43,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:40:43,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1022 transitions. [2023-11-19 07:40:43,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942901234567901 [2023-11-19 07:40:43,971 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1022 transitions. [2023-11-19 07:40:43,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1022 transitions. [2023-11-19 07:40:43,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:43,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1022 transitions. [2023-11-19 07:40:43,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 127.75) internal successors, (1022), 8 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:43,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:43,985 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:43,987 INFO L175 Difference]: Start difference. First operand has 39 places, 28 transitions, 121 flow. Second operand 8 states and 1022 transitions. [2023-11-19 07:40:43,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 313 flow [2023-11-19 07:40:43,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 56 transitions, 309 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:40:43,992 INFO L231 Difference]: Finished difference. Result has 45 places, 28 transitions, 150 flow [2023-11-19 07:40:43,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=28} [2023-11-19 07:40:43,994 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2023-11-19 07:40:43,994 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 28 transitions, 150 flow [2023-11-19 07:40:43,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 121.5) internal successors, (972), 8 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:43,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:43,996 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-19 07:40:44,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:44,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:44,199 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:40:44,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:44,199 INFO L85 PathProgramCache]: Analyzing trace with hash -116535570, now seen corresponding path program 2 times [2023-11-19 07:40:44,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:40:44,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155542938] [2023-11-19 07:40:44,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:40:44,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:44,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:40:44,200 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:40:44,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-19 07:40:44,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:40:44,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:40:44,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:40:44,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:44,307 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 [2023-11-19 07:40:44,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:44,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:40:44,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:44,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-19 07:40:44,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:44,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:40:44,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:44,366 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 [2023-11-19 07:40:44,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:44,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-19 07:40:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:44,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:45,335 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:40:45,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155542938] [2023-11-19 07:40:45,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155542938] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:45,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:45,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-19 07:40:45,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611267884] [2023-11-19 07:40:45,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:45,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:40:45,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:40:45,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:40:45,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:40:48,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 324 [2023-11-19 07:40:48,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 28 transitions, 150 flow. Second operand has 12 states, 12 states have (on average 126.0) internal successors, (1512), 12 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:48,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:48,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 324 [2023-11-19 07:40:48,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:51,197 INFO L124 PetriNetUnfolderBase]: 167/306 cut-off events. [2023-11-19 07:40:51,198 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2023-11-19 07:40:51,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 907 conditions, 306 events. 167/306 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 993 event pairs, 105 based on Foata normal form. 6/241 useless extension candidates. Maximal degree in co-relation 888. Up to 297 conditions per place. [2023-11-19 07:40:51,201 INFO L140 encePairwiseOnDemand]: 320/324 looper letters, 20 selfloop transitions, 20 changer transitions 0/40 dead transitions. [2023-11-19 07:40:51,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 40 transitions, 308 flow [2023-11-19 07:40:51,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:40:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:40:51,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1546 transitions. [2023-11-19 07:40:51,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976337448559671 [2023-11-19 07:40:51,209 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1546 transitions. [2023-11-19 07:40:51,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1546 transitions. [2023-11-19 07:40:51,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:51,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1546 transitions. [2023-11-19 07:40:51,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 128.83333333333334) internal successors, (1546), 12 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:51,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 324.0) internal successors, (4212), 13 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:51,227 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 324.0) internal successors, (4212), 13 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:51,227 INFO L175 Difference]: Start difference. First operand has 45 places, 28 transitions, 150 flow. Second operand 12 states and 1546 transitions. [2023-11-19 07:40:51,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 40 transitions, 308 flow [2023-11-19 07:40:51,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 40 transitions, 281 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-11-19 07:40:51,230 INFO L231 Difference]: Finished difference. Result has 55 places, 40 transitions, 275 flow [2023-11-19 07:40:51,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=275, PETRI_PLACES=55, PETRI_TRANSITIONS=40} [2023-11-19 07:40:51,231 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2023-11-19 07:40:51,231 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 40 transitions, 275 flow [2023-11-19 07:40:51,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 126.0) internal successors, (1512), 12 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:51,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:51,232 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-11-19 07:40:51,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:51,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:51,435 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 07:40:51,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:51,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1375517963, now seen corresponding path program 1 times [2023-11-19 07:40:51,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-19 07:40:51,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152922181] [2023-11-19 07:40:51,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:51,437 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 07:40:51,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat [2023-11-19 07:40:51,438 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 07:40:51,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95c85363-51de-405c-950c-d797cba260ff/bin/uautomizer-verify-uCwYo4JHxu/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-19 07:40:51,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:51,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 07:40:51,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:51,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-19 07:40:51,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:51,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-19 07:40:51,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:51,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:40:51,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:51,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-19 07:40:51,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:51,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:40:51,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:51,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-19 07:40:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:52,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:53,681 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-19 07:40:53,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152922181] [2023-11-19 07:40:53,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152922181] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:53,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:53,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-19 07:40:53,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137746117] [2023-11-19 07:40:53,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:53,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:40:53,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-19 07:40:53,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:40:53,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182