./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI --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 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:47:33,970 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:47:34,067 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:47:34,078 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:47:34,079 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:47:34,114 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:47:34,118 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:47:34,119 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:47:34,120 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:47:34,125 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:47:34,126 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:47:34,127 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:47:34,128 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:47:34,129 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:47:34,130 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:47:34,130 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:47:34,131 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:47:34,131 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:47:34,132 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:47:34,132 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:47:34,132 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:47:34,133 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:47:34,133 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:47:34,134 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:47:34,134 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:47:34,134 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:47:34,135 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:47:34,135 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:47:34,136 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:47:34,137 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:47:34,138 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:47:34,138 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:47:34,138 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:47:34,139 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:47:34,139 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:47:34,139 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:47:34,139 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:47:34,139 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:47:34,140 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:47:34,140 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:47:34,140 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:47:34,140 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_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d [2023-11-24 21:47:34,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:47:34,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:47:34,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:47:34,488 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:47:34,489 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:47:34,490 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-24 21:47:37,794 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:47:38,141 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:47:38,141 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-24 21:47:38,157 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/data/877772746/e2a5d4ea6133482290e4c2fbf37d562d/FLAGf72c6afda [2023-11-24 21:47:38,181 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/data/877772746/e2a5d4ea6133482290e4c2fbf37d562d [2023-11-24 21:47:38,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:47:38,196 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:47:38,201 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:47:38,202 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:47:38,209 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:47:38,209 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:47:38" (1/1) ... [2023-11-24 21:47:38,211 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ebfa56c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:38, skipping insertion in model container [2023-11-24 21:47:38,211 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:47:38" (1/1) ... [2023-11-24 21:47:38,257 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:47:38,517 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:47:38,535 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) [2023-11-24 21:47:38,536 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2211f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:38, skipping insertion in model container [2023-11-24 21:47:38,536 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:47:38,536 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-24 21:47:38,539 INFO L158 Benchmark]: Toolchain (without parser) took 342.10ms. Allocated memory is still 203.4MB. Free memory was 157.2MB in the beginning and 147.2MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 21:47:38,540 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 203.4MB. Free memory is still 178.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 21:47:38,541 INFO L158 Benchmark]: CACSL2BoogieTranslator took 334.94ms. Allocated memory is still 203.4MB. Free memory was 157.0MB in the beginning and 147.2MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 21:47:38,543 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 203.4MB. Free memory is still 178.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 334.94ms. Allocated memory is still 203.4MB. Free memory was 157.0MB in the beginning and 147.2MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 114]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI --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 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:47:41,290 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:47:41,436 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-24 21:47:41,445 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:47:41,448 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:47:41,502 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:47:41,503 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:47:41,503 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:47:41,504 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:47:41,510 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:47:41,510 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:47:41,511 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:47:41,512 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:47:41,513 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:47:41,514 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:47:41,514 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:47:41,515 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:47:41,515 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:47:41,516 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:47:41,517 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:47:41,517 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:47:41,518 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:47:41,518 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:47:41,519 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:47:41,519 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:47:41,520 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 21:47:41,520 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 21:47:41,521 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:47:41,521 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:47:41,521 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:47:41,524 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:47:41,524 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:47:41,524 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:47:41,524 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:47:41,525 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:47:41,525 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:47:41,526 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:47:41,526 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-24 21:47:41,527 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 21:47:41,527 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:47:41,527 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:47:41,528 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:47:41,528 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:47:41,528 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-24 21:47:41,529 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_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d [2023-11-24 21:47:42,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:47:42,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:47:42,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:47:42,067 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:47:42,067 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:47:42,069 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-24 21:47:45,584 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:47:45,877 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:47:45,878 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-24 21:47:45,890 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/data/7e018ecc1/67b279ad93d04b0a90dc8e605282bc12/FLAG99d9f46b5 [2023-11-24 21:47:45,913 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/data/7e018ecc1/67b279ad93d04b0a90dc8e605282bc12 [2023-11-24 21:47:45,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:47:45,923 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:47:45,927 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:47:45,928 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:47:45,934 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:47:45,935 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:47:45" (1/1) ... [2023-11-24 21:47:45,936 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cca2b22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:45, skipping insertion in model container [2023-11-24 21:47:45,940 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:47:45" (1/1) ... [2023-11-24 21:47:45,983 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:47:46,254 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:47:46,282 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-24 21:47:46,326 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:47:46,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:47:46,382 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:47:46,413 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:47:46,426 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:47:46,426 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:47:46,435 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:47:46,436 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:46 WrapperNode [2023-11-24 21:47:46,436 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:47:46,437 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:47:46,438 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:47:46,438 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:47:46,446 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:46" (1/1) ... [2023-11-24 21:47:46,460 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:46" (1/1) ... [2023-11-24 21:47:46,493 INFO L138 Inliner]: procedures = 27, calls = 40, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 169 [2023-11-24 21:47:46,494 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:47:46,495 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:47:46,495 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:47:46,495 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:47:46,509 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:46" (1/1) ... [2023-11-24 21:47:46,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:46" (1/1) ... [2023-11-24 21:47:46,515 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:46" (1/1) ... [2023-11-24 21:47:46,548 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 4, 2]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-24 21:47:46,548 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:46" (1/1) ... [2023-11-24 21:47:46,548 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:46" (1/1) ... [2023-11-24 21:47:46,575 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:46" (1/1) ... [2023-11-24 21:47:46,579 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:46" (1/1) ... [2023-11-24 21:47:46,582 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:46" (1/1) ... [2023-11-24 21:47:46,593 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:46" (1/1) ... [2023-11-24 21:47:46,598 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:47:46,604 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:47:46,604 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:47:46,604 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:47:46,605 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:46" (1/1) ... [2023-11-24 21:47:46,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:47:46,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:46,640 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:47:46,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:47:46,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:47:46,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-24 21:47:46,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-24 21:47:46,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-24 21:47:46,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-24 21:47:46,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:47:46,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-24 21:47:46,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-24 21:47:46,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-24 21:47:46,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-24 21:47:46,674 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:47:46,674 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:47:46,675 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:47:46,675 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:47:46,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:47:46,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:47:46,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:47:46,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:47:46,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:47:46,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:47:46,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-24 21:47:46,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-24 21:47:46,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-24 21:47:46,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-24 21:47:46,679 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:47:46,839 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:47:46,841 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:47:47,406 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:47:47,887 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:47:47,887 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-24 21:47:47,888 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:47:47 BoogieIcfgContainer [2023-11-24 21:47:47,888 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:47:47,891 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:47:47,891 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:47:47,895 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:47:47,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:47:45" (1/3) ... [2023-11-24 21:47:47,896 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b695fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:47:47, skipping insertion in model container [2023-11-24 21:47:47,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:46" (2/3) ... [2023-11-24 21:47:47,897 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b695fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:47:47, skipping insertion in model container [2023-11-24 21:47:47,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:47:47" (3/3) ... [2023-11-24 21:47:47,898 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-11-24 21:47:47,921 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:47:47,921 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-24 21:47:47,922 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:47:47,998 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 21:47:48,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 53 transitions, 120 flow [2023-11-24 21:47:48,116 INFO L124 PetriNetUnfolderBase]: 4/51 cut-off events. [2023-11-24 21:47:48,117 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:47:48,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 51 events. 4/51 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 113 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2023-11-24 21:47:48,124 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 53 transitions, 120 flow [2023-11-24 21:47:48,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 50 transitions, 112 flow [2023-11-24 21:47:48,154 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:47:48,180 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;@73f56f0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:47:48,180 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-11-24 21:47:48,184 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:47:48,185 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-24 21:47:48,185 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:47:48,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:47:48,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:47:48,186 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:47:48,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:48,193 INFO L85 PathProgramCache]: Analyzing trace with hash 509752, now seen corresponding path program 1 times [2023-11-24 21:47:48,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:47:48,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924225185] [2023-11-24 21:47:48,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:48,216 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 [2023-11-24 21:47:48,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:47:48,223 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:47:48,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:47:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:48,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:47:48,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:48,465 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 [2023-11-24 21:47:48,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:48,505 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 [2023-11-24 21:47:48,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:48,515 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 [2023-11-24 21:47:48,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:48,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:47:48,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:48,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 21:47:48,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:48,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:47:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:48,565 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:47:48,566 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:47:48,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924225185] [2023-11-24 21:47:48,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924225185] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:47:48,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:47:48,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:47:48,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310768250] [2023-11-24 21:47:48,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:47:48,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:47:48,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:47:48,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:47:48,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:47:48,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2023-11-24 21:47:48,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:48,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:47:48,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2023-11-24 21:47:48,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:47:49,000 INFO L124 PetriNetUnfolderBase]: 238/514 cut-off events. [2023-11-24 21:47:49,000 INFO L125 PetriNetUnfolderBase]: For 27/29 co-relation queries the response was YES. [2023-11-24 21:47:49,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 938 conditions, 514 events. 238/514 cut-off events. For 27/29 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2523 event pairs, 201 based on Foata normal form. 22/370 useless extension candidates. Maximal degree in co-relation 851. Up to 388 conditions per place. [2023-11-24 21:47:49,011 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 25 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-11-24 21:47:49,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 46 transitions, 158 flow [2023-11-24 21:47:49,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:47:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:47:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2023-11-24 21:47:49,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6037735849056604 [2023-11-24 21:47:49,026 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 96 transitions. [2023-11-24 21:47:49,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 96 transitions. [2023-11-24 21:47:49,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:47:49,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 96 transitions. [2023-11-24 21:47:49,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:49,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:49,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:49,049 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 112 flow. Second operand 3 states and 96 transitions. [2023-11-24 21:47:49,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 46 transitions, 158 flow [2023-11-24 21:47:49,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:47:49,056 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 100 flow [2023-11-24 21:47:49,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-11-24 21:47:49,062 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -5 predicate places. [2023-11-24 21:47:49,063 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 100 flow [2023-11-24 21:47:49,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:49,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:47:49,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:47:49,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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)] Ended with exit code 0 [2023-11-24 21:47:49,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:47:49,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:47:49,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:49,267 INFO L85 PathProgramCache]: Analyzing trace with hash 509753, now seen corresponding path program 1 times [2023-11-24 21:47:49,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:47:49,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735040378] [2023-11-24 21:47:49,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:49,272 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 [2023-11-24 21:47:49,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:47:49,275 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:47:49,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:47:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:49,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:47:49,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:49,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-24 21:47:49,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:49,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:47:49,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:49,456 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 [2023-11-24 21:47:49,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:49,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:47:49,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:49,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:47:49,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:49,527 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 [2023-11-24 21:47:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:49,635 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:47:49,635 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:47:49,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735040378] [2023-11-24 21:47:49,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1735040378] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:47:49,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:47:49,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:47:49,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053475029] [2023-11-24 21:47:49,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:47:49,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:47:49,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:47:49,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:47:49,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:47:49,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2023-11-24 21:47:49,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:49,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:47:49,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2023-11-24 21:47:49,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:47:50,276 INFO L124 PetriNetUnfolderBase]: 239/517 cut-off events. [2023-11-24 21:47:50,277 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2023-11-24 21:47:50,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 928 conditions, 517 events. 239/517 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2521 event pairs, 201 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 906. Up to 393 conditions per place. [2023-11-24 21:47:50,285 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 27 selfloop transitions, 4 changer transitions 0/49 dead transitions. [2023-11-24 21:47:50,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 170 flow [2023-11-24 21:47:50,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:47:50,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:47:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2023-11-24 21:47:50,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2023-11-24 21:47:50,289 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 120 transitions. [2023-11-24 21:47:50,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 120 transitions. [2023-11-24 21:47:50,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:47:50,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 120 transitions. [2023-11-24 21:47:50,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:50,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:50,293 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:50,294 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 100 flow. Second operand 4 states and 120 transitions. [2023-11-24 21:47:50,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 170 flow [2023-11-24 21:47:50,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:47:50,297 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 123 flow [2023-11-24 21:47:50,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2023-11-24 21:47:50,298 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -2 predicate places. [2023-11-24 21:47:50,299 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 123 flow [2023-11-24 21:47:50,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:50,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:47:50,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:47:50,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:47:50,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:47:50,502 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:47:50,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:50,503 INFO L85 PathProgramCache]: Analyzing trace with hash 509796, now seen corresponding path program 1 times [2023-11-24 21:47:50,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:47:50,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555299011] [2023-11-24 21:47:50,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:50,504 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 [2023-11-24 21:47:50,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:47:50,505 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:47:50,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:47:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:50,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:47:50,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:50,685 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-24 21:47:50,686 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 [2023-11-24 21:47:50,716 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:47:50,717 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 [2023-11-24 21:47:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:50,808 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:47:50,808 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:47:50,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555299011] [2023-11-24 21:47:50,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555299011] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:47:50,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:47:50,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:47:50,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64522872] [2023-11-24 21:47:50,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:47:50,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:47:50,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:47:50,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:47:50,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:47:50,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2023-11-24 21:47:50,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:50,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:47:50,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2023-11-24 21:47:50,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:47:51,189 INFO L124 PetriNetUnfolderBase]: 379/718 cut-off events. [2023-11-24 21:47:51,189 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-24 21:47:51,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1339 conditions, 718 events. 379/718 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3529 event pairs, 324 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 1315. Up to 594 conditions per place. [2023-11-24 21:47:51,197 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 31 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-11-24 21:47:51,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 183 flow [2023-11-24 21:47:51,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:47:51,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:47:51,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-24 21:47:51,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534591194968553 [2023-11-24 21:47:51,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-24 21:47:51,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-24 21:47:51,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:47:51,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-24 21:47:51,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:51,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:51,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:51,210 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 123 flow. Second operand 3 states and 88 transitions. [2023-11-24 21:47:51,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 183 flow [2023-11-24 21:47:51,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 47 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:47:51,215 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 118 flow [2023-11-24 21:47:51,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-11-24 21:47:51,218 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -3 predicate places. [2023-11-24 21:47:51,218 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 118 flow [2023-11-24 21:47:51,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:51,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:47:51,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:47:51,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-24 21:47:51,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:47:51,421 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:47:51,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:51,422 INFO L85 PathProgramCache]: Analyzing trace with hash 509797, now seen corresponding path program 1 times [2023-11-24 21:47:51,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:47:51,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574033844] [2023-11-24 21:47:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:51,423 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 [2023-11-24 21:47:51,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:47:51,427 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:47:51,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:47:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:51,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:47:51,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:51,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:51,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:51,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-24 21:47:51,586 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 [2023-11-24 21:47:51,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:51,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-24 21:47:51,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:51,639 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 [2023-11-24 21:47:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:51,717 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:47:51,718 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:47:51,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574033844] [2023-11-24 21:47:51,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574033844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:47:51,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:47:51,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:47:51,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019499414] [2023-11-24 21:47:51,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:47:51,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:47:51,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:47:51,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:47:51,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:47:51,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2023-11-24 21:47:51,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:51,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:47:51,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2023-11-24 21:47:51,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:47:52,060 INFO L124 PetriNetUnfolderBase]: 239/497 cut-off events. [2023-11-24 21:47:52,060 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2023-11-24 21:47:52,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 916 conditions, 497 events. 239/497 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2288 event pairs, 201 based on Foata normal form. 71/422 useless extension candidates. Maximal degree in co-relation 907. Up to 393 conditions per place. [2023-11-24 21:47:52,066 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 29 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-24 21:47:52,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 45 transitions, 174 flow [2023-11-24 21:47:52,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:47:52,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:47:52,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2023-11-24 21:47:52,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5786163522012578 [2023-11-24 21:47:52,070 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2023-11-24 21:47:52,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2023-11-24 21:47:52,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:47:52,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2023-11-24 21:47:52,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:52,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:52,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:52,074 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 118 flow. Second operand 3 states and 92 transitions. [2023-11-24 21:47:52,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 45 transitions, 174 flow [2023-11-24 21:47:52,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 45 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:47:52,077 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 115 flow [2023-11-24 21:47:52,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-11-24 21:47:52,079 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -4 predicate places. [2023-11-24 21:47:52,080 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 115 flow [2023-11-24 21:47:52,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:52,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:47:52,080 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-24 21:47:52,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:47:52,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:47:52,283 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:47:52,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:52,284 INFO L85 PathProgramCache]: Analyzing trace with hash 489889393, now seen corresponding path program 1 times [2023-11-24 21:47:52,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:47:52,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747659334] [2023-11-24 21:47:52,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:52,285 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 [2023-11-24 21:47:52,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:47:52,286 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:47:52,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:47:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:52,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:47:52,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:52,420 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 [2023-11-24 21:47:52,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:52,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:47:52,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:52,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:47:52,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:52,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:47:52,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:52,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:47:52,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:52,531 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 [2023-11-24 21:47:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:52,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:53,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:47:53,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747659334] [2023-11-24 21:47:53,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747659334] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:53,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:47:53,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:47:53,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498895013] [2023-11-24 21:47:53,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:53,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:47:53,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:47:53,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:47:53,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:47:54,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2023-11-24 21:47:54,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 115 flow. Second operand has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:54,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:47:54,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2023-11-24 21:47:54,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:47:55,387 INFO L124 PetriNetUnfolderBase]: 242/506 cut-off events. [2023-11-24 21:47:55,387 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2023-11-24 21:47:55,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 506 events. 242/506 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2349 event pairs, 201 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 935. Up to 396 conditions per place. [2023-11-24 21:47:55,393 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 27 selfloop transitions, 13 changer transitions 0/54 dead transitions. [2023-11-24 21:47:55,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 231 flow [2023-11-24 21:47:55,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:47:55,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:47:55,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 263 transitions. [2023-11-24 21:47:55,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962264150943396 [2023-11-24 21:47:55,396 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 263 transitions. [2023-11-24 21:47:55,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 263 transitions. [2023-11-24 21:47:55,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:47:55,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 263 transitions. [2023-11-24 21:47:55,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 26.3) internal successors, (263), 10 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:55,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:55,401 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:55,401 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 115 flow. Second operand 10 states and 263 transitions. [2023-11-24 21:47:55,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 231 flow [2023-11-24 21:47:55,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:47:55,404 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 194 flow [2023-11-24 21:47:55,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=194, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2023-11-24 21:47:55,406 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 7 predicate places. [2023-11-24 21:47:55,406 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 194 flow [2023-11-24 21:47:55,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:55,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:47:55,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:47:55,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:55,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:47:55,621 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:47:55,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:55,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1992031286, now seen corresponding path program 1 times [2023-11-24 21:47:55,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:47:55,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794316244] [2023-11-24 21:47:55,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:55,622 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 [2023-11-24 21:47:55,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:47:55,624 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:47:55,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:47:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:55,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:47:55,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:55,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:55,750 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 [2023-11-24 21:47:55,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:55,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:55,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:47:55,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:55,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:55,803 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 [2023-11-24 21:47:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:55,846 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:47:55,846 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:47:55,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794316244] [2023-11-24 21:47:55,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794316244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:47:55,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:47:55,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:47:55,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880380124] [2023-11-24 21:47:55,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:47:55,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:47:55,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:47:55,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:47:55,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:47:55,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2023-11-24 21:47:55,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:55,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:47:55,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2023-11-24 21:47:55,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:47:56,128 INFO L124 PetriNetUnfolderBase]: 242/498 cut-off events. [2023-11-24 21:47:56,129 INFO L125 PetriNetUnfolderBase]: For 13/15 co-relation queries the response was YES. [2023-11-24 21:47:56,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 961 conditions, 498 events. 242/498 cut-off events. For 13/15 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2305 event pairs, 201 based on Foata normal form. 17/377 useless extension candidates. Maximal degree in co-relation 947. Up to 402 conditions per place. [2023-11-24 21:47:56,134 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 38 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-11-24 21:47:56,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 268 flow [2023-11-24 21:47:56,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:47:56,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:47:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2023-11-24 21:47:56,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5786163522012578 [2023-11-24 21:47:56,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2023-11-24 21:47:56,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2023-11-24 21:47:56,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:47:56,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2023-11-24 21:47:56,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:56,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:56,138 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:56,139 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 194 flow. Second operand 3 states and 92 transitions. [2023-11-24 21:47:56,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 268 flow [2023-11-24 21:47:56,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 238 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-24 21:47:56,143 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 162 flow [2023-11-24 21:47:56,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2023-11-24 21:47:56,145 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2023-11-24 21:47:56,145 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 162 flow [2023-11-24 21:47:56,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:56,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:47:56,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:47:56,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:47:56,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:47:56,349 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:47:56,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:56,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1992031287, now seen corresponding path program 1 times [2023-11-24 21:47:56,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:47:56,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502088851] [2023-11-24 21:47:56,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:56,350 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 [2023-11-24 21:47:56,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:47:56,351 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:47:56,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:47:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:56,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:47:56,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:56,480 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:47:56,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2023-11-24 21:47:56,508 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:47:56,508 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 [2023-11-24 21:47:56,534 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:47:56,535 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 [2023-11-24 21:47:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:56,643 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:47:56,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:47:56,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502088851] [2023-11-24 21:47:56,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502088851] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:47:56,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:47:56,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:47:56,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719922883] [2023-11-24 21:47:56,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:47:56,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:47:56,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:47:56,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:47:56,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:47:56,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2023-11-24 21:47:56,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:56,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:47:56,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2023-11-24 21:47:56,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:47:56,953 INFO L124 PetriNetUnfolderBase]: 258/514 cut-off events. [2023-11-24 21:47:56,954 INFO L125 PetriNetUnfolderBase]: For 9/11 co-relation queries the response was YES. [2023-11-24 21:47:56,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 514 events. 258/514 cut-off events. For 9/11 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2343 event pairs, 216 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 982. Up to 435 conditions per place. [2023-11-24 21:47:56,961 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 40 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-11-24 21:47:56,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 50 transitions, 240 flow [2023-11-24 21:47:56,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:47:56,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:47:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-24 21:47:56,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534591194968553 [2023-11-24 21:47:56,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-24 21:47:56,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-24 21:47:56,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:47:56,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-24 21:47:56,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:56,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:56,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:56,966 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 162 flow. Second operand 3 states and 88 transitions. [2023-11-24 21:47:56,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 50 transitions, 240 flow [2023-11-24 21:47:56,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 50 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:47:56,969 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 159 flow [2023-11-24 21:47:56,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2023-11-24 21:47:56,971 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-11-24 21:47:56,971 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 159 flow [2023-11-24 21:47:56,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:56,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:47:56,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:56,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:57,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:47:57,175 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:47:57,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:57,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1623414803, now seen corresponding path program 1 times [2023-11-24 21:47:57,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:47:57,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759219143] [2023-11-24 21:47:57,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:57,176 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 [2023-11-24 21:47:57,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:47:57,178 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:47:57,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:47:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:57,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:47:57,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:57,278 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 [2023-11-24 21:47:57,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:57,296 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 [2023-11-24 21:47:57,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:57,304 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 [2023-11-24 21:47:57,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:57,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 21:47:57,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:57,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 21:47:57,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:57,331 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 [2023-11-24 21:47:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:57,357 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:47:57,358 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:47:57,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759219143] [2023-11-24 21:47:57,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759219143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:47:57,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:47:57,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:47:57,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853681517] [2023-11-24 21:47:57,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:47:57,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:47:57,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:47:57,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:47:57,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:47:57,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2023-11-24 21:47:57,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 159 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:57,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:47:57,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2023-11-24 21:47:57,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:47:57,660 INFO L124 PetriNetUnfolderBase]: 171/358 cut-off events. [2023-11-24 21:47:57,661 INFO L125 PetriNetUnfolderBase]: For 10/12 co-relation queries the response was YES. [2023-11-24 21:47:57,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 358 events. 171/358 cut-off events. For 10/12 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1471 event pairs, 136 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 675. Up to 275 conditions per place. [2023-11-24 21:47:57,665 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 30 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2023-11-24 21:47:57,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 225 flow [2023-11-24 21:47:57,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:47:57,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:47:57,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2023-11-24 21:47:57,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5424528301886793 [2023-11-24 21:47:57,667 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 115 transitions. [2023-11-24 21:47:57,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 115 transitions. [2023-11-24 21:47:57,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:47:57,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 115 transitions. [2023-11-24 21:47:57,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:57,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:57,669 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:57,670 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 159 flow. Second operand 4 states and 115 transitions. [2023-11-24 21:47:57,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 225 flow [2023-11-24 21:47:57,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 47 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:47:57,673 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 164 flow [2023-11-24 21:47:57,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2023-11-24 21:47:57,674 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2023-11-24 21:47:57,674 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 164 flow [2023-11-24 21:47:57,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:57,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:47:57,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:57,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:47:57,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:47:57,879 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:47:57,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:57,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1623414802, now seen corresponding path program 1 times [2023-11-24 21:47:57,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:47:57,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787007968] [2023-11-24 21:47:57,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:57,880 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 [2023-11-24 21:47:57,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:47:57,882 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:47:57,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:47:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:57,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:47:57,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:58,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:47:58,066 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:47:58,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787007968] [2023-11-24 21:47:58,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787007968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:47:58,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:47:58,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:47:58,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547912025] [2023-11-24 21:47:58,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:47:58,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:47:58,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:47:58,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:47:58,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:47:58,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 53 [2023-11-24 21:47:58,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:58,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:47:58,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 53 [2023-11-24 21:47:58,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:47:58,392 INFO L124 PetriNetUnfolderBase]: 183/403 cut-off events. [2023-11-24 21:47:58,392 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-24 21:47:58,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 403 events. 183/403 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1729 event pairs, 149 based on Foata normal form. 18/359 useless extension candidates. Maximal degree in co-relation 760. Up to 284 conditions per place. [2023-11-24 21:47:58,397 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 33 selfloop transitions, 2 changer transitions 8/54 dead transitions. [2023-11-24 21:47:58,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 266 flow [2023-11-24 21:47:58,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:47:58,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:47:58,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2023-11-24 21:47:58,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6226415094339622 [2023-11-24 21:47:58,399 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 132 transitions. [2023-11-24 21:47:58,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 132 transitions. [2023-11-24 21:47:58,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:47:58,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 132 transitions. [2023-11-24 21:47:58,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:58,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:58,402 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:58,402 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 164 flow. Second operand 4 states and 132 transitions. [2023-11-24 21:47:58,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 266 flow [2023-11-24 21:47:58,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 259 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:47:58,405 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 168 flow [2023-11-24 21:47:58,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2023-11-24 21:47:58,407 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2023-11-24 21:47:58,407 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 168 flow [2023-11-24 21:47:58,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:58,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:47:58,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:58,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-11-24 21:47:58,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:47:58,610 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:47:58,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:58,611 INFO L85 PathProgramCache]: Analyzing trace with hash -67525850, now seen corresponding path program 1 times [2023-11-24 21:47:58,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:47:58,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2062837239] [2023-11-24 21:47:58,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:58,611 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 [2023-11-24 21:47:58,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:47:58,612 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:47:58,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:47:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:58,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-24 21:47:58,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:58,754 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 [2023-11-24 21:47:58,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:58,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:47:58,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:58,793 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 [2023-11-24 21:47:58,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:58,802 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 [2023-11-24 21:47:58,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:58,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:47:58,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:47:58,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:47:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:59,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:48:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:00,139 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:48:00,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2062837239] [2023-11-24 21:48:00,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2062837239] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:48:00,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:48:00,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:48:00,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766024451] [2023-11-24 21:48:00,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:48:00,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:48:00,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:48:00,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:48:00,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:48:01,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2023-11-24 21:48:01,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 168 flow. Second operand has 10 states, 10 states have (on average 23.4) internal successors, (234), 10 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:01,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:48:01,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2023-11-24 21:48:01,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:48:03,321 INFO L124 PetriNetUnfolderBase]: 382/815 cut-off events. [2023-11-24 21:48:03,321 INFO L125 PetriNetUnfolderBase]: For 110/112 co-relation queries the response was YES. [2023-11-24 21:48:03,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1679 conditions, 815 events. 382/815 cut-off events. For 110/112 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4145 event pairs, 302 based on Foata normal form. 0/726 useless extension candidates. Maximal degree in co-relation 1662. Up to 274 conditions per place. [2023-11-24 21:48:03,329 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 59 selfloop transitions, 11 changer transitions 0/80 dead transitions. [2023-11-24 21:48:03,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 80 transitions, 396 flow [2023-11-24 21:48:03,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:48:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-24 21:48:03,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 273 transitions. [2023-11-24 21:48:03,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5723270440251572 [2023-11-24 21:48:03,333 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 273 transitions. [2023-11-24 21:48:03,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 273 transitions. [2023-11-24 21:48:03,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:48:03,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 273 transitions. [2023-11-24 21:48:03,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 30.333333333333332) internal successors, (273), 9 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:03,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 53.0) internal successors, (530), 10 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:03,337 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 53.0) internal successors, (530), 10 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:03,337 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 168 flow. Second operand 9 states and 273 transitions. [2023-11-24 21:48:03,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 80 transitions, 396 flow [2023-11-24 21:48:03,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 80 transitions, 392 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:48:03,341 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 201 flow [2023-11-24 21:48:03,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=201, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2023-11-24 21:48:03,342 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 11 predicate places. [2023-11-24 21:48:03,342 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 201 flow [2023-11-24 21:48:03,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.4) internal successors, (234), 10 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:03,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:48:03,343 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-24 21:48:03,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:48:03,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:48:03,545 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:48:03,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:03,546 INFO L85 PathProgramCache]: Analyzing trace with hash 453873689, now seen corresponding path program 2 times [2023-11-24 21:48:03,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:48:03,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18397743] [2023-11-24 21:48:03,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:48:03,546 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 [2023-11-24 21:48:03,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:48:03,547 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:48:03,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:48:03,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:48:03,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:48:03,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:48:03,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:48:03,681 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 [2023-11-24 21:48:03,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:48:03,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:48:03,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:48:03,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:48:03,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:48:03,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:48:03,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:48:03,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:48:03,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:48:03,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:48:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:04,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:48:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:05,168 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:48:05,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18397743] [2023-11-24 21:48:05,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18397743] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:48:05,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:48:05,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-24 21:48:05,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994853378] [2023-11-24 21:48:05,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:48:05,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:48:05,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:48:05,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:48:05,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:48:07,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2023-11-24 21:48:07,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 201 flow. Second operand has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:07,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:48:07,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2023-11-24 21:48:07,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:48:12,026 INFO L124 PetriNetUnfolderBase]: 386/826 cut-off events. [2023-11-24 21:48:12,026 INFO L125 PetriNetUnfolderBase]: For 359/365 co-relation queries the response was YES. [2023-11-24 21:48:12,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 826 events. 386/826 cut-off events. For 359/365 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4276 event pairs, 302 based on Foata normal form. 6/783 useless extension candidates. Maximal degree in co-relation 1832. Up to 633 conditions per place. [2023-11-24 21:48:12,034 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 24 selfloop transitions, 30 changer transitions 0/64 dead transitions. [2023-11-24 21:48:12,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 64 transitions, 423 flow [2023-11-24 21:48:12,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-24 21:48:12,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-24 21:48:12,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 544 transitions. [2023-11-24 21:48:12,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4665523156089194 [2023-11-24 21:48:12,040 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 544 transitions. [2023-11-24 21:48:12,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 544 transitions. [2023-11-24 21:48:12,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:48:12,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 544 transitions. [2023-11-24 21:48:12,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 24.727272727272727) internal successors, (544), 22 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:12,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 53.0) internal successors, (1219), 23 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:12,045 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 53.0) internal successors, (1219), 23 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:12,045 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 201 flow. Second operand 22 states and 544 transitions. [2023-11-24 21:48:12,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 64 transitions, 423 flow [2023-11-24 21:48:12,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 64 transitions, 413 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:48:12,064 INFO L231 Difference]: Finished difference. Result has 87 places, 64 transitions, 395 flow [2023-11-24 21:48:12,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=395, PETRI_PLACES=87, PETRI_TRANSITIONS=64} [2023-11-24 21:48:12,065 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 34 predicate places. [2023-11-24 21:48:12,066 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 64 transitions, 395 flow [2023-11-24 21:48:12,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:12,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:48:12,066 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:12,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-24 21:48:12,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:48:12,270 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:48:12,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:12,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1099759410, now seen corresponding path program 2 times [2023-11-24 21:48:12,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:48:12,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115120036] [2023-11-24 21:48:12,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:48:12,271 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 [2023-11-24 21:48:12,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:48:12,272 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:48:12,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:48:12,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-24 21:48:12,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:48:12,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:48:12,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:48:12,407 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 [2023-11-24 21:48:12,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:48:12,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:48:12,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:48:12,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:48:12,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:48:12,440 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 [2023-11-24 21:48:12,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:48:12,459 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 [2023-11-24 21:48:12,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:48:12,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:48:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 21:48:12,685 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:48:12,685 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:48:12,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115120036] [2023-11-24 21:48:12,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115120036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:12,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:12,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:48:12,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612969101] [2023-11-24 21:48:12,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:12,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:48:12,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:48:12,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:48:12,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:48:12,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 53 [2023-11-24 21:48:12,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 64 transitions, 395 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:12,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:48:12,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 53 [2023-11-24 21:48:12,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:48:13,116 INFO L124 PetriNetUnfolderBase]: 329/721 cut-off events. [2023-11-24 21:48:13,116 INFO L125 PetriNetUnfolderBase]: For 348/354 co-relation queries the response was YES. [2023-11-24 21:48:13,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1552 conditions, 721 events. 329/721 cut-off events. For 348/354 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3576 event pairs, 249 based on Foata normal form. 35/711 useless extension candidates. Maximal degree in co-relation 1526. Up to 532 conditions per place. [2023-11-24 21:48:13,123 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 39 selfloop transitions, 11 changer transitions 0/61 dead transitions. [2023-11-24 21:48:13,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 61 transitions, 471 flow [2023-11-24 21:48:13,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:48:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:48:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2023-11-24 21:48:13,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5471698113207547 [2023-11-24 21:48:13,125 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 116 transitions. [2023-11-24 21:48:13,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 116 transitions. [2023-11-24 21:48:13,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:48:13,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 116 transitions. [2023-11-24 21:48:13,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:13,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:13,128 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:13,128 INFO L175 Difference]: Start difference. First operand has 87 places, 64 transitions, 395 flow. Second operand 4 states and 116 transitions. [2023-11-24 21:48:13,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 61 transitions, 471 flow [2023-11-24 21:48:13,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 61 transitions, 390 flow, removed 27 selfloop flow, removed 11 redundant places. [2023-11-24 21:48:13,133 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 312 flow [2023-11-24 21:48:13,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2023-11-24 21:48:13,134 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 23 predicate places. [2023-11-24 21:48:13,134 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 312 flow [2023-11-24 21:48:13,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:13,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:48:13,135 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2023-11-24 21:48:13,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-24 21:48:13,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:48:13,339 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-24 21:48:13,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:13,339 INFO L85 PathProgramCache]: Analyzing trace with hash -2024056471, now seen corresponding path program 3 times [2023-11-24 21:48:13,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:48:13,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314553500] [2023-11-24 21:48:13,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:48:13,340 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 [2023-11-24 21:48:13,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:48:13,341 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:48:13,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55d2e89-1e4c-47a7-b978-c86a64e0d27e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-24 21:48:13,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-24 21:48:13,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:48:13,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-24 21:48:13,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:48:13,741 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 [2023-11-24 21:48:13,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:48:13,775 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 [2023-11-24 21:48:13,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:48:13,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:48:13,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:48:13,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:48:13,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:48:13,810 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 [2023-11-24 21:48:13,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:48:13,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:48:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:14,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:48:18,363 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:18,363 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:48:18,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314553500] [2023-11-24 21:48:18,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314553500] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:48:18,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:48:18,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-11-24 21:48:18,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180495186] [2023-11-24 21:48:18,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:48:18,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-24 21:48:18,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:48:18,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-24 21:48:18,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2023-11-24 21:48:26,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2023-11-24 21:48:26,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 312 flow. Second operand has 26 states, 26 states have (on average 23.76923076923077) internal successors, (618), 26 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:26,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:48:26,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2023-11-24 21:48:26,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand