./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.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_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:39:30,092 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:39:30,208 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:39:30,215 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:39:30,216 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:39:30,265 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:39:30,266 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:39:30,266 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:39:30,267 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:39:30,273 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:39:30,273 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:39:30,274 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:39:30,275 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:39:30,276 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:39:30,277 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:39:30,277 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:39:30,278 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:39:30,278 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:39:30,279 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:39:30,279 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:39:30,280 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:39:30,281 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:39:30,281 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:39:30,282 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:39:30,282 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:39:30,283 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:39:30,283 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:39:30,284 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:39:30,285 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:39:30,285 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:39:30,286 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:39:30,287 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:39:30,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:39:30,288 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:39:30,288 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:39:30,288 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:39:30,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:39:30,289 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:39:30,289 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:39:30,290 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:39:30,290 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:39:30,290 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_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 [2023-11-24 21:39:30,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:39:30,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:39:30,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:39:30,621 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:39:30,622 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:39:30,623 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2023-11-24 21:39:33,743 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:39:34,100 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:39:34,101 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2023-11-24 21:39:34,113 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/data/1c4f16d0b/173bfa82daf84346918c7c877560f9c8/FLAG19025564e [2023-11-24 21:39:34,135 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/data/1c4f16d0b/173bfa82daf84346918c7c877560f9c8 [2023-11-24 21:39:34,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:39:34,145 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:39:34,149 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:39:34,149 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:39:34,155 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:39:34,156 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:39:34" (1/1) ... [2023-11-24 21:39:34,157 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aa8c33a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:34, skipping insertion in model container [2023-11-24 21:39:34,158 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:39:34" (1/1) ... [2023-11-24 21:39:34,195 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:39:34,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:39:34,516 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 21:39:34,517 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@27824ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:34, skipping insertion in model container [2023-11-24 21:39:34,517 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:39:34,518 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-24 21:39:34,522 INFO L158 Benchmark]: Toolchain (without parser) took 374.38ms. Allocated memory is still 161.5MB. Free memory was 126.4MB in the beginning and 116.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 21:39:34,522 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 161.5MB. Free memory is still 105.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 21:39:34,523 INFO L158 Benchmark]: CACSL2BoogieTranslator took 368.88ms. Allocated memory is still 161.5MB. Free memory was 125.9MB in the beginning and 116.0MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 21:39:34,525 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 161.5MB. Free memory is still 105.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 368.88ms. Allocated memory is still 161.5MB. Free memory was 125.9MB in the beginning and 116.0MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 97]: 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_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:39:37,130 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:39:37,267 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-24 21:39:37,278 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:39:37,281 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:39:37,345 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:39:37,346 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:39:37,346 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:39:37,348 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:39:37,349 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:39:37,350 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:39:37,350 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:39:37,351 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:39:37,351 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:39:37,352 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:39:37,353 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:39:37,353 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:39:37,353 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:39:37,354 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:39:37,354 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:39:37,355 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:39:37,355 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:39:37,356 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:39:37,356 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:39:37,357 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:39:37,357 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 21:39:37,358 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 21:39:37,358 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:39:37,359 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:39:37,359 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:39:37,361 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:39:37,361 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:39:37,362 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:39:37,362 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:39:37,362 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:39:37,363 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:39:37,364 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:39:37,364 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-24 21:39:37,364 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 21:39:37,365 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:39:37,365 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:39:37,365 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:39:37,366 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:39:37,366 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-24 21:39:37,366 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_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 [2023-11-24 21:39:37,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:39:37,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:39:37,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:39:37,783 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:39:37,784 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:39:37,785 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2023-11-24 21:39:40,979 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:39:41,291 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:39:41,292 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2023-11-24 21:39:41,302 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/data/5a7c9a72f/8fbfe86bcf834e05a66a18c30dbf388f/FLAGd0219a5af [2023-11-24 21:39:41,319 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/data/5a7c9a72f/8fbfe86bcf834e05a66a18c30dbf388f [2023-11-24 21:39:41,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:39:41,324 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:39:41,326 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:39:41,326 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:39:41,334 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:39:41,334 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:39:41" (1/1) ... [2023-11-24 21:39:41,335 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74b9109a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:41, skipping insertion in model container [2023-11-24 21:39:41,336 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:39:41" (1/1) ... [2023-11-24 21:39:41,368 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:39:41,630 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:39:41,649 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-24 21:39:41,655 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:39:41,694 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:39:41,701 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:39:41,755 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:39:41,776 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:39:41,782 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:39:41,791 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:39:41,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:41 WrapperNode [2023-11-24 21:39:41,792 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:39:41,793 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:39:41,794 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:39:41,794 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:39:41,802 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:41" (1/1) ... [2023-11-24 21:39:41,825 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:41" (1/1) ... [2023-11-24 21:39:41,883 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 200 [2023-11-24 21:39:41,884 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:39:41,884 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:39:41,885 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:39:41,885 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:39:41,909 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:41" (1/1) ... [2023-11-24 21:39:41,909 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:41" (1/1) ... [2023-11-24 21:39:41,917 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:41" (1/1) ... [2023-11-24 21:39:41,985 INFO L175 MemorySlicer]: Split 18 memory accesses to 4 slices as follows [2, 2, 2, 12]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 2]. [2023-11-24 21:39:41,986 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:41" (1/1) ... [2023-11-24 21:39:41,986 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:41" (1/1) ... [2023-11-24 21:39:42,011 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:41" (1/1) ... [2023-11-24 21:39:42,029 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:41" (1/1) ... [2023-11-24 21:39:42,033 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:41" (1/1) ... [2023-11-24 21:39:42,044 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:41" (1/1) ... [2023-11-24 21:39:42,053 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:39:42,054 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:39:42,054 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:39:42,055 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:39:42,056 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:41" (1/1) ... [2023-11-24 21:39:42,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:39:42,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:39:42,119 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:39:42,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:39:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:39:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-24 21:39:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-24 21:39:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-24 21:39:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-24 21:39:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:39:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-24 21:39:42,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-24 21:39:42,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-24 21:39:42,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-24 21:39:42,171 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:39:42,171 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:39:42,172 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:39:42,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:39:42,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:39:42,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:39:42,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:39:42,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:39:42,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:39:42,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:39:42,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-24 21:39:42,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-24 21:39:42,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-24 21:39:42,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-24 21:39:42,176 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 21:39:42,338 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:39:42,340 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:39:43,203 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:39:43,826 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:39:43,826 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 21:39:43,827 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:39:43 BoogieIcfgContainer [2023-11-24 21:39:43,827 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:39:43,831 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:39:43,831 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:39:43,836 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:39:43,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:39:41" (1/3) ... [2023-11-24 21:39:43,837 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c68e30a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:39:43, skipping insertion in model container [2023-11-24 21:39:43,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:41" (2/3) ... [2023-11-24 21:39:43,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c68e30a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:39:43, skipping insertion in model container [2023-11-24 21:39:43,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:39:43" (3/3) ... [2023-11-24 21:39:43,842 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2023-11-24 21:39:43,867 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:39:43,867 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-11-24 21:39:43,868 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:39:44,029 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 21:39:44,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 67 transitions, 148 flow [2023-11-24 21:39:44,161 INFO L124 PetriNetUnfolderBase]: 4/65 cut-off events. [2023-11-24 21:39:44,161 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:39:44,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 65 events. 4/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 193 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2023-11-24 21:39:44,168 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 67 transitions, 148 flow [2023-11-24 21:39:44,174 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 64 transitions, 140 flow [2023-11-24 21:39:44,197 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:39:44,211 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;@62999066, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:39:44,211 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2023-11-24 21:39:44,218 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:39:44,218 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-24 21:39:44,219 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:39:44,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:44,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:39:44,221 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:39:44,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:44,228 INFO L85 PathProgramCache]: Analyzing trace with hash 685629, now seen corresponding path program 1 times [2023-11-24 21:39:44,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:44,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408462209] [2023-11-24 21:39:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:44,250 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 21:39:44,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:44,256 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:44,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:44,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:39:44,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:44,557 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 21:39:44,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:44,581 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 21:39:44,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:44,598 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 21:39:44,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:44,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 21:39:44,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:44,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 21:39:44,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:44,683 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 21:39:44,696 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 21:39:44,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:39:44,699 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:44,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408462209] [2023-11-24 21:39:44,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408462209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:44,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:44,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:39:44,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514421747] [2023-11-24 21:39:44,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:44,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:39:44,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:44,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:39:44,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:39:44,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2023-11-24 21:39:44,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 140 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 21:39:44,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:44,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2023-11-24 21:39:44,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:45,426 INFO L124 PetriNetUnfolderBase]: 219/451 cut-off events. [2023-11-24 21:39:45,426 INFO L125 PetriNetUnfolderBase]: For 38/40 co-relation queries the response was YES. [2023-11-24 21:39:45,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 860 conditions, 451 events. 219/451 cut-off events. For 38/40 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 2429 event pairs, 182 based on Foata normal form. 1/273 useless extension candidates. Maximal degree in co-relation 782. Up to 373 conditions per place. [2023-11-24 21:39:45,440 INFO L140 encePairwiseOnDemand]: 50/67 looper letters, 28 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-11-24 21:39:45,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 168 flow [2023-11-24 21:39:45,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:39:45,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:39:45,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2023-11-24 21:39:45,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5373134328358209 [2023-11-24 21:39:45,461 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 108 transitions. [2023-11-24 21:39:45,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 108 transitions. [2023-11-24 21:39:45,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:45,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 108 transitions. [2023-11-24 21:39:45,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:45,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 21:39:45,480 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 21:39:45,482 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 140 flow. Second operand 3 states and 108 transitions. [2023-11-24 21:39:45,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 168 flow [2023-11-24 21:39:45,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 48 transitions, 160 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:39:45,499 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 104 flow [2023-11-24 21:39:45,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2023-11-24 21:39:45,512 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -18 predicate places. [2023-11-24 21:39:45,512 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 104 flow [2023-11-24 21:39:45,513 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 21:39:45,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:45,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:39:45,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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)] Forceful destruction successful, exit code 0 [2023-11-24 21:39:45,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:45,716 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:39:45,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:45,717 INFO L85 PathProgramCache]: Analyzing trace with hash 685630, now seen corresponding path program 1 times [2023-11-24 21:39:45,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:45,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348008519] [2023-11-24 21:39:45,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:45,719 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 21:39:45,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:45,723 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:45,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:45,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:39:45,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:45,955 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 21:39:45,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:45,982 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 21:39:45,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:46,000 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 21:39:46,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:46,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (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 21:39:46,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:46,065 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 21:39:46,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:46,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (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 21:39:46,199 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 21:39:46,199 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:39:46,200 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:46,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348008519] [2023-11-24 21:39:46,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348008519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:46,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:46,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:39:46,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461880168] [2023-11-24 21:39:46,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:46,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:39:46,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:46,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:39:46,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:39:46,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2023-11-24 21:39:46,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 21:39:46,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:46,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2023-11-24 21:39:46,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:47,091 INFO L124 PetriNetUnfolderBase]: 221/457 cut-off events. [2023-11-24 21:39:47,091 INFO L125 PetriNetUnfolderBase]: For 9/11 co-relation queries the response was YES. [2023-11-24 21:39:47,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 457 events. 221/457 cut-off events. For 9/11 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 2454 event pairs, 182 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 822. Up to 382 conditions per place. [2023-11-24 21:39:47,099 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 31 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2023-11-24 21:39:47,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 54 transitions, 194 flow [2023-11-24 21:39:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:39:47,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:39:47,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2023-11-24 21:39:47,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4626865671641791 [2023-11-24 21:39:47,103 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 124 transitions. [2023-11-24 21:39:47,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 124 transitions. [2023-11-24 21:39:47,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:47,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 124 transitions. [2023-11-24 21:39:47,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 21:39:47,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 21:39:47,108 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 21:39:47,108 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 104 flow. Second operand 4 states and 124 transitions. [2023-11-24 21:39:47,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 54 transitions, 194 flow [2023-11-24 21:39:47,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 54 transitions, 188 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:39:47,112 INFO L231 Difference]: Finished difference. Result has 53 places, 54 transitions, 156 flow [2023-11-24 21:39:47,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=53, PETRI_TRANSITIONS=54} [2023-11-24 21:39:47,114 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -14 predicate places. [2023-11-24 21:39:47,114 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 54 transitions, 156 flow [2023-11-24 21:39:47,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 21:39:47,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:47,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-24 21:39:47,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:47,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:47,328 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:39:47,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:47,329 INFO L85 PathProgramCache]: Analyzing trace with hash 21255602, now seen corresponding path program 1 times [2023-11-24 21:39:47,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:47,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318745010] [2023-11-24 21:39:47,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:47,330 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 21:39:47,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:47,332 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:47,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:47,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:39:47,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:47,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:47,633 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-24 21:39:47,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-24 21:39:47,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:47,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:47,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-11-24 21:39:47,768 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:39:47,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-24 21:39:47,816 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 21:39:47,816 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:39:47,816 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:47,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318745010] [2023-11-24 21:39:47,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318745010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:47,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:47,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:39:47,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525024108] [2023-11-24 21:39:47,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:47,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:39:47,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:47,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:39:47,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:39:47,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2023-11-24 21:39:47,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 54 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 21:39:47,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:47,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2023-11-24 21:39:47,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:48,268 INFO L124 PetriNetUnfolderBase]: 221/448 cut-off events. [2023-11-24 21:39:48,268 INFO L125 PetriNetUnfolderBase]: For 10/12 co-relation queries the response was YES. [2023-11-24 21:39:48,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 448 events. 221/448 cut-off events. For 10/12 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 2339 event pairs, 182 based on Foata normal form. 65/344 useless extension candidates. Maximal degree in co-relation 824. Up to 384 conditions per place. [2023-11-24 21:39:48,274 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 35 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-11-24 21:39:48,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 224 flow [2023-11-24 21:39:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:39:48,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:39:48,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2023-11-24 21:39:48,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.472636815920398 [2023-11-24 21:39:48,279 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2023-11-24 21:39:48,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2023-11-24 21:39:48,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:48,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2023-11-24 21:39:48,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 21:39:48,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 21:39:48,285 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 21:39:48,285 INFO L175 Difference]: Start difference. First operand has 53 places, 54 transitions, 156 flow. Second operand 3 states and 95 transitions. [2023-11-24 21:39:48,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 224 flow [2023-11-24 21:39:48,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 224 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:39:48,291 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 154 flow [2023-11-24 21:39:48,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=51, 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=154, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-11-24 21:39:48,293 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -14 predicate places. [2023-11-24 21:39:48,294 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 154 flow [2023-11-24 21:39:48,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 21:39:48,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:48,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-24 21:39:48,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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)] Forceful destruction successful, exit code 0 [2023-11-24 21:39:48,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:48,498 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:39:48,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:48,499 INFO L85 PathProgramCache]: Analyzing trace with hash 21255603, now seen corresponding path program 1 times [2023-11-24 21:39:48,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:48,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757063083] [2023-11-24 21:39:48,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:48,502 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 21:39:48,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:48,508 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:48,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:48,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:39:48,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:48,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:48,672 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 21:39:48,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:48,690 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 21:39:48,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:48,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:48,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:48,740 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 21:39:48,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:48,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:39:48,858 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 21:39:48,858 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:39:48,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:48,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757063083] [2023-11-24 21:39:48,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757063083] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:48,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:48,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:39:48,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271444729] [2023-11-24 21:39:48,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:48,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:39:48,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:48,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:39:48,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:39:49,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2023-11-24 21:39:49,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 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 21:39:49,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:49,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2023-11-24 21:39:49,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:49,331 INFO L124 PetriNetUnfolderBase]: 221/439 cut-off events. [2023-11-24 21:39:49,331 INFO L125 PetriNetUnfolderBase]: For 10/12 co-relation queries the response was YES. [2023-11-24 21:39:49,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 861 conditions, 439 events. 221/439 cut-off events. For 10/12 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2245 event pairs, 182 based on Foata normal form. 65/344 useless extension candidates. Maximal degree in co-relation 850. Up to 384 conditions per place. [2023-11-24 21:39:49,336 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 35 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-11-24 21:39:49,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 222 flow [2023-11-24 21:39:49,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:39:49,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:39:49,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2023-11-24 21:39:49,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.472636815920398 [2023-11-24 21:39:49,339 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2023-11-24 21:39:49,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2023-11-24 21:39:49,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:49,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2023-11-24 21:39:49,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 21:39:49,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 21:39:49,342 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 21:39:49,342 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 154 flow. Second operand 3 states and 95 transitions. [2023-11-24 21:39:49,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 222 flow [2023-11-24 21:39:49,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 221 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:39:49,345 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 151 flow [2023-11-24 21:39:49,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=50, 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=151, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2023-11-24 21:39:49,347 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -15 predicate places. [2023-11-24 21:39:49,347 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 151 flow [2023-11-24 21:39:49,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 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 21:39:49,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:49,347 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-24 21:39:49,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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)] Ended with exit code 0 [2023-11-24 21:39:49,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:49,550 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:39:49,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:49,551 INFO L85 PathProgramCache]: Analyzing trace with hash 658912009, now seen corresponding path program 1 times [2023-11-24 21:39:49,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:49,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510473773] [2023-11-24 21:39:49,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:49,552 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 21:39:49,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:49,553 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:49,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:49,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:39:49,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:49,671 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 21:39:49,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:49,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:39:49,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:49,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (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 21:39:49,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:49,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:39:49,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:49,745 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 21:39:49,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:49,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (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 21:39:49,973 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 21:39:49,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:39:50,529 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 21:39:50,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:50,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510473773] [2023-11-24 21:39:50,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510473773] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:39:50,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:39:50,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:39:50,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512008368] [2023-11-24 21:39:50,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:39:50,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:39:50,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:50,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:39:50,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:39:51,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2023-11-24 21:39:51,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 151 flow. Second operand has 10 states, 10 states have (on average 22.0) internal successors, (220), 10 states have internal predecessors, (220), 0 states have call successors, (0), 0 states 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 21:39:51,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:51,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2023-11-24 21:39:51,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:53,825 INFO L124 PetriNetUnfolderBase]: 227/457 cut-off events. [2023-11-24 21:39:53,825 INFO L125 PetriNetUnfolderBase]: For 13/15 co-relation queries the response was YES. [2023-11-24 21:39:53,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 457 events. 227/457 cut-off events. For 13/15 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 2334 event pairs, 182 based on Foata normal form. 0/292 useless extension candidates. Maximal degree in co-relation 909. Up to 385 conditions per place. [2023-11-24 21:39:53,830 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 31 selfloop transitions, 25 changer transitions 0/68 dead transitions. [2023-11-24 21:39:53,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 68 transitions, 341 flow [2023-11-24 21:39:53,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:39:53,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:39:53,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 272 transitions. [2023-11-24 21:39:53,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059701492537313 [2023-11-24 21:39:53,834 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 272 transitions. [2023-11-24 21:39:53,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 272 transitions. [2023-11-24 21:39:53,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:53,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 272 transitions. [2023-11-24 21:39:53,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 27.2) internal successors, (272), 10 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 21:39:53,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 67.0) internal successors, (737), 11 states have internal predecessors, (737), 0 states have call successors, (0), 0 states 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 21:39:53,840 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 67.0) internal successors, (737), 11 states have internal predecessors, (737), 0 states have call successors, (0), 0 states 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 21:39:53,840 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 151 flow. Second operand 10 states and 272 transitions. [2023-11-24 21:39:53,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 68 transitions, 341 flow [2023-11-24 21:39:53,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 68 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:39:53,844 INFO L231 Difference]: Finished difference. Result has 63 places, 68 transitions, 312 flow [2023-11-24 21:39:53,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=68} [2023-11-24 21:39:53,845 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -4 predicate places. [2023-11-24 21:39:53,846 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 68 transitions, 312 flow [2023-11-24 21:39:53,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.0) internal successors, (220), 10 states have internal predecessors, (220), 0 states have call successors, (0), 0 states 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 21:39:53,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:53,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:53,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:54,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:54,049 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:39:54,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:54,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1866145254, now seen corresponding path program 1 times [2023-11-24 21:39:54,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:54,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388787656] [2023-11-24 21:39:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:54,052 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 21:39:54,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:54,056 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:54,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:54,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:39:54,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:54,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:54,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-24 21:39:54,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:54,251 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 21:39:54,271 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:39:54,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:54,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:54,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 21:39:54,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:54,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:39:54,468 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 21:39:54,469 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:39:54,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:54,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388787656] [2023-11-24 21:39:54,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388787656] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:54,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:54,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:39:54,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094693462] [2023-11-24 21:39:54,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:54,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:39:54,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:54,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:39:54,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:39:54,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2023-11-24 21:39:54,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 68 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 21:39:54,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:54,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2023-11-24 21:39:54,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:55,032 INFO L124 PetriNetUnfolderBase]: 227/449 cut-off events. [2023-11-24 21:39:55,032 INFO L125 PetriNetUnfolderBase]: For 34/36 co-relation queries the response was YES. [2023-11-24 21:39:55,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 449 events. 227/449 cut-off events. For 34/36 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2270 event pairs, 182 based on Foata normal form. 15/312 useless extension candidates. Maximal degree in co-relation 940. Up to 402 conditions per place. [2023-11-24 21:39:55,038 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 53 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2023-11-24 21:39:55,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 66 transitions, 416 flow [2023-11-24 21:39:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:39:55,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:39:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2023-11-24 21:39:55,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.472636815920398 [2023-11-24 21:39:55,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2023-11-24 21:39:55,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2023-11-24 21:39:55,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:55,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2023-11-24 21:39:55,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 21:39:55,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 21:39:55,042 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 21:39:55,042 INFO L175 Difference]: Start difference. First operand has 63 places, 68 transitions, 312 flow. Second operand 3 states and 95 transitions. [2023-11-24 21:39:55,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 66 transitions, 416 flow [2023-11-24 21:39:55,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 66 transitions, 352 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-11-24 21:39:55,053 INFO L231 Difference]: Finished difference. Result has 59 places, 66 transitions, 246 flow [2023-11-24 21:39:55,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=59, PETRI_TRANSITIONS=66} [2023-11-24 21:39:55,058 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -8 predicate places. [2023-11-24 21:39:55,058 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 66 transitions, 246 flow [2023-11-24 21:39:55,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 21:39:55,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:55,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:55,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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)] Forceful destruction successful, exit code 0 [2023-11-24 21:39:55,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:55,262 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:39:55,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:55,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1866145253, now seen corresponding path program 1 times [2023-11-24 21:39:55,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:55,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131596988] [2023-11-24 21:39:55,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:55,263 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 21:39:55,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:55,264 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:55,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:55,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:39:55,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:55,423 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-24 21:39:55,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-24 21:39:55,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:55,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:55,480 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 21:39:55,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-24 21:39:55,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:55,494 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 21:39:55,495 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 21 treesize of output 1 [2023-11-24 21:39:55,520 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:39:55,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-24 21:39:55,544 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 21:39:55,545 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:39:55,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:55,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131596988] [2023-11-24 21:39:55,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131596988] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:55,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:55,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:39:55,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722452120] [2023-11-24 21:39:55,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:55,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:39:55,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:55,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:39:55,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:39:55,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 67 [2023-11-24 21:39:55,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 66 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 21:39:55,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:55,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 67 [2023-11-24 21:39:55,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:55,880 INFO L124 PetriNetUnfolderBase]: 243/466 cut-off events. [2023-11-24 21:39:55,880 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-24 21:39:55,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 466 events. 243/466 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2320 event pairs, 196 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 959. Up to 434 conditions per place. [2023-11-24 21:39:55,886 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 55 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-11-24 21:39:55,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 64 transitions, 354 flow [2023-11-24 21:39:55,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:39:55,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:39:55,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2023-11-24 21:39:55,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527363184079602 [2023-11-24 21:39:55,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 91 transitions. [2023-11-24 21:39:55,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 91 transitions. [2023-11-24 21:39:55,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:55,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 91 transitions. [2023-11-24 21:39:55,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 21:39:55,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 21:39:55,890 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 21:39:55,890 INFO L175 Difference]: Start difference. First operand has 59 places, 66 transitions, 246 flow. Second operand 3 states and 91 transitions. [2023-11-24 21:39:55,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 64 transitions, 354 flow [2023-11-24 21:39:55,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 64 transitions, 353 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:39:55,894 INFO L231 Difference]: Finished difference. Result has 58 places, 64 transitions, 243 flow [2023-11-24 21:39:55,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=243, PETRI_PLACES=58, PETRI_TRANSITIONS=64} [2023-11-24 21:39:55,895 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2023-11-24 21:39:55,895 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 64 transitions, 243 flow [2023-11-24 21:39:55,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 21:39:55,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:55,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:55,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:56,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:56,099 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:39:56,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:56,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2015974683, now seen corresponding path program 1 times [2023-11-24 21:39:56,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:56,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316459237] [2023-11-24 21:39:56,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:56,101 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 21:39:56,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:56,102 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:56,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:56,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:39:56,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:56,343 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 21:39:56,343 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:39:56,343 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:56,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316459237] [2023-11-24 21:39:56,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316459237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:56,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:56,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:39:56,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030158349] [2023-11-24 21:39:56,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:56,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:39:56,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:56,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:39:56,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:39:56,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 67 [2023-11-24 21:39:56,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 64 transitions, 243 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 21:39:56,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:56,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 67 [2023-11-24 21:39:56,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:56,804 INFO L124 PetriNetUnfolderBase]: 269/553 cut-off events. [2023-11-24 21:39:56,805 INFO L125 PetriNetUnfolderBase]: For 34/38 co-relation queries the response was YES. [2023-11-24 21:39:56,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 553 events. 269/553 cut-off events. For 34/38 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 2917 event pairs, 220 based on Foata normal form. 12/413 useless extension candidates. Maximal degree in co-relation 1137. Up to 400 conditions per place. [2023-11-24 21:39:56,810 INFO L140 encePairwiseOnDemand]: 55/67 looper letters, 76 selfloop transitions, 3 changer transitions 2/91 dead transitions. [2023-11-24 21:39:56,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 91 transitions, 505 flow [2023-11-24 21:39:56,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:39:56,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:39:56,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 149 transitions. [2023-11-24 21:39:56,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5559701492537313 [2023-11-24 21:39:56,812 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 149 transitions. [2023-11-24 21:39:56,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 149 transitions. [2023-11-24 21:39:56,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:56,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 149 transitions. [2023-11-24 21:39:56,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 21:39:56,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 21:39:56,815 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 21:39:56,815 INFO L175 Difference]: Start difference. First operand has 58 places, 64 transitions, 243 flow. Second operand 4 states and 149 transitions. [2023-11-24 21:39:56,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 91 transitions, 505 flow [2023-11-24 21:39:56,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 91 transitions, 504 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:39:56,819 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 267 flow [2023-11-24 21:39:56,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=267, PETRI_PLACES=61, PETRI_TRANSITIONS=64} [2023-11-24 21:39:56,820 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -6 predicate places. [2023-11-24 21:39:56,821 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 267 flow [2023-11-24 21:39:56,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 21:39:56,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:56,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:56,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:57,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:57,025 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:39:57,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:57,026 INFO L85 PathProgramCache]: Analyzing trace with hash -951394512, now seen corresponding path program 1 times [2023-11-24 21:39:57,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:57,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090074171] [2023-11-24 21:39:57,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:57,027 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 21:39:57,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:57,028 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:57,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:57,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:39:57,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:39:57,291 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:39:57,292 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:57,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090074171] [2023-11-24 21:39:57,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090074171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:57,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:57,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:39:57,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408944212] [2023-11-24 21:39:57,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:57,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:39:57,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:57,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:39:57,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:39:57,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 67 [2023-11-24 21:39:57,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 21:39:57,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:57,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 67 [2023-11-24 21:39:57,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:57,837 INFO L124 PetriNetUnfolderBase]: 329/729 cut-off events. [2023-11-24 21:39:57,837 INFO L125 PetriNetUnfolderBase]: For 91/99 co-relation queries the response was YES. [2023-11-24 21:39:57,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1637 conditions, 729 events. 329/729 cut-off events. For 91/99 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4238 event pairs, 282 based on Foata normal form. 29/612 useless extension candidates. Maximal degree in co-relation 1619. Up to 489 conditions per place. [2023-11-24 21:39:57,845 INFO L140 encePairwiseOnDemand]: 56/67 looper letters, 60 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2023-11-24 21:39:57,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 77 transitions, 437 flow [2023-11-24 21:39:57,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:39:57,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:39:57,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2023-11-24 21:39:57,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447761194029851 [2023-11-24 21:39:57,847 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 146 transitions. [2023-11-24 21:39:57,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 146 transitions. [2023-11-24 21:39:57,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:57,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 146 transitions. [2023-11-24 21:39:57,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 21:39:57,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 21:39:57,850 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 21:39:57,850 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 267 flow. Second operand 4 states and 146 transitions. [2023-11-24 21:39:57,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 77 transitions, 437 flow [2023-11-24 21:39:57,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 77 transitions, 433 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-24 21:39:57,854 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 294 flow [2023-11-24 21:39:57,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2023-11-24 21:39:57,855 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -3 predicate places. [2023-11-24 21:39:57,856 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 294 flow [2023-11-24 21:39:57,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 21:39:57,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:57,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:57,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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)] Forceful destruction successful, exit code 0 [2023-11-24 21:39:58,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:58,060 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:39:58,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:58,061 INFO L85 PathProgramCache]: Analyzing trace with hash -951394519, now seen corresponding path program 1 times [2023-11-24 21:39:58,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:58,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994367205] [2023-11-24 21:39:58,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:58,061 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 21:39:58,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:58,062 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:58,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:58,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:39:58,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:58,235 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 21:39:58,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:58,256 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 21:39:58,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:58,263 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 21:39:58,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:58,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 21:39:58,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:58,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 21:39:58,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:58,288 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 21:39:58,318 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:39:58,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-24 21:39:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:39:58,394 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:39:58,394 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:39:58,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994367205] [2023-11-24 21:39:58,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994367205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:58,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:58,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:39:58,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120570319] [2023-11-24 21:39:58,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:58,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:39:58,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:39:58,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:39:58,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:39:58,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2023-11-24 21:39:58,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 294 flow. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 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 21:39:58,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:58,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2023-11-24 21:39:58,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:58,927 INFO L124 PetriNetUnfolderBase]: 272/623 cut-off events. [2023-11-24 21:39:58,927 INFO L125 PetriNetUnfolderBase]: For 163/171 co-relation queries the response was YES. [2023-11-24 21:39:58,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1506 conditions, 623 events. 272/623 cut-off events. For 163/171 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3427 event pairs, 229 based on Foata normal form. 0/541 useless extension candidates. Maximal degree in co-relation 1487. Up to 498 conditions per place. [2023-11-24 21:39:58,934 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 41 selfloop transitions, 11 changer transitions 0/62 dead transitions. [2023-11-24 21:39:58,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 62 transitions, 388 flow [2023-11-24 21:39:58,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:39:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:39:58,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2023-11-24 21:39:58,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40298507462686567 [2023-11-24 21:39:58,936 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 135 transitions. [2023-11-24 21:39:58,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 135 transitions. [2023-11-24 21:39:58,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:58,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 135 transitions. [2023-11-24 21:39:58,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:58,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states 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 21:39:58,939 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states 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 21:39:58,939 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 294 flow. Second operand 5 states and 135 transitions. [2023-11-24 21:39:58,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 62 transitions, 388 flow [2023-11-24 21:39:58,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 374 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:39:58,956 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 292 flow [2023-11-24 21:39:58,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=292, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2023-11-24 21:39:58,958 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -3 predicate places. [2023-11-24 21:39:58,958 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 292 flow [2023-11-24 21:39:58,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 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 21:39:58,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:58,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:58,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:59,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:59,162 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:39:59,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:59,162 INFO L85 PathProgramCache]: Analyzing trace with hash -951394518, now seen corresponding path program 1 times [2023-11-24 21:39:59,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:39:59,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064724555] [2023-11-24 21:39:59,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:59,163 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 21:39:59,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:39:59,164 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:59,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:39:59,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:59,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-24 21:39:59,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:59,387 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 21:39:59,395 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 21:39:59,412 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 21:39:59,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:59,426 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 21:39:59,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:59,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (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 21:39:59,456 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 21:39:59,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:59,468 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 21:39:59,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:59,500 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 21:39:59,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:59,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (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 21:39:59,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:39:59,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-24 21:39:59,743 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-24 21:39:59,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-24 21:39:59,956 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 21:39:59,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:40:00,854 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 21:40:00,854 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:40:00,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064724555] [2023-11-24 21:40:00,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064724555] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:40:00,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:40:00,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:40:00,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550450008] [2023-11-24 21:40:00,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:40:00,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:40:00,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:40:00,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:40:00,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:40:03,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 67 [2023-11-24 21:40:03,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 292 flow. Second operand has 10 states, 10 states have (on average 20.6) internal successors, (206), 10 states have internal predecessors, (206), 0 states have call successors, (0), 0 states 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 21:40:03,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:40:03,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 67 [2023-11-24 21:40:03,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:40:06,426 INFO L124 PetriNetUnfolderBase]: 559/1243 cut-off events. [2023-11-24 21:40:06,426 INFO L125 PetriNetUnfolderBase]: For 389/403 co-relation queries the response was YES. [2023-11-24 21:40:06,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3056 conditions, 1243 events. 559/1243 cut-off events. For 389/403 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7663 event pairs, 371 based on Foata normal form. 48/1111 useless extension candidates. Maximal degree in co-relation 3037. Up to 445 conditions per place. [2023-11-24 21:40:06,437 INFO L140 encePairwiseOnDemand]: 54/67 looper letters, 77 selfloop transitions, 54 changer transitions 3/142 dead transitions. [2023-11-24 21:40:06,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 142 transitions, 943 flow [2023-11-24 21:40:06,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 21:40:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-24 21:40:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 396 transitions. [2023-11-24 21:40:06,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3940298507462687 [2023-11-24 21:40:06,441 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 396 transitions. [2023-11-24 21:40:06,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 396 transitions. [2023-11-24 21:40:06,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:40:06,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 396 transitions. [2023-11-24 21:40:06,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 26.4) internal successors, (396), 15 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 21:40:06,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 67.0) internal successors, (1072), 16 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 21:40:06,446 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 67.0) internal successors, (1072), 16 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 21:40:06,447 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 292 flow. Second operand 15 states and 396 transitions. [2023-11-24 21:40:06,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 142 transitions, 943 flow [2023-11-24 21:40:06,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 142 transitions, 912 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:40:06,454 INFO L231 Difference]: Finished difference. Result has 86 places, 98 transitions, 706 flow [2023-11-24 21:40:06,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=706, PETRI_PLACES=86, PETRI_TRANSITIONS=98} [2023-11-24 21:40:06,455 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 19 predicate places. [2023-11-24 21:40:06,455 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 98 transitions, 706 flow [2023-11-24 21:40:06,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.6) internal successors, (206), 10 states have internal predecessors, (206), 0 states have call successors, (0), 0 states 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 21:40:06,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:40:06,456 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-24 21:40:06,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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)] Forceful destruction successful, exit code 0 [2023-11-24 21:40:06,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:40:06,659 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:40:06,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:06,659 INFO L85 PathProgramCache]: Analyzing trace with hash 2042626282, now seen corresponding path program 2 times [2023-11-24 21:40:06,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:40:06,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736272811] [2023-11-24 21:40:06,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:40:06,660 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 21:40:06,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:40:06,661 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:40:06,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d9b130d-9b20-417d-9289-773b4d9d7bd9/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 21:40:06,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:40:06,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:40:06,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 21:40:06,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:40:06,815 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 21:40:06,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:40:06,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:40:06,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:40:06,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (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 21:40:06,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:40:06,861 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 21:40:06,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:40:06,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (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 21:40:06,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:40:06,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:40:07,191 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 21:40:07,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:40:08,075 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 21:40:08,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:40:08,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736272811] [2023-11-24 21:40:08,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736272811] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:40:08,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:40:08,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-24 21:40:08,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050136970] [2023-11-24 21:40:08,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:40:08,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:40:08,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:40:08,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:40:08,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:40:10,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2023-11-24 21:40:10,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 98 transitions, 706 flow. Second operand has 14 states, 14 states have (on average 22.571428571428573) internal successors, (316), 14 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 21:40:10,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:40:10,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2023-11-24 21:40:10,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:40:16,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 21:40:19,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 21:40:21,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 21:40:26,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []