./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 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_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ --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 dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:38:20,266 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:38:20,395 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-23 22:38:20,407 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:38:20,408 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:38:20,455 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:38:20,456 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:38:20,457 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:38:20,458 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:38:20,463 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:38:20,464 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:38:20,465 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:38:20,465 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:38:20,466 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:38:20,466 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:38:20,467 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:38:20,467 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:38:20,468 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:38:20,468 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 22:38:20,469 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 22:38:20,469 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 22:38:20,470 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:38:20,470 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 22:38:20,472 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 22:38:20,472 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:38:20,473 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:38:20,474 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:38:20,474 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:38:20,475 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:38:20,475 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:38:20,477 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:38:20,477 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:38:20,477 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:38:20,478 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:38:20,478 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:38:20,478 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:38:20,478 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:38:20,479 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:38:20,479 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:38:20,479 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_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 [2023-11-23 22:38:20,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:38:20,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:38:20,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:38:20,863 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:38:20,864 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:38:20,865 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2023-11-23 22:38:24,243 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:38:24,544 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:38:24,545 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2023-11-23 22:38:24,564 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/data/3205d9ac6/00e8cebfa5084e1da15a4012e1fe9af8/FLAGc4ba8dcd7 [2023-11-23 22:38:24,583 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/data/3205d9ac6/00e8cebfa5084e1da15a4012e1fe9af8 [2023-11-23 22:38:24,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:38:24,587 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:38:24,588 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:38:24,588 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:38:24,594 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:38:24,594 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:38:24" (1/1) ... [2023-11-23 22:38:24,596 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65a5d42b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:24, skipping insertion in model container [2023-11-23 22:38:24,596 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:38:24" (1/1) ... [2023-11-23 22:38:24,670 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:38:25,248 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 22:38:25,249 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 22:38:25,249 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 22:38:25,252 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 22:38:25,310 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:38:25,350 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) [2023-11-23 22:38:25,351 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@267bb9b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:25, skipping insertion in model container [2023-11-23 22:38:25,351 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:38:25,352 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-23 22:38:25,354 INFO L158 Benchmark]: Toolchain (without parser) took 765.82ms. Allocated memory is still 207.6MB. Free memory was 156.7MB in the beginning and 141.2MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-23 22:38:25,354 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 142.6MB. Free memory is still 86.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 22:38:25,355 INFO L158 Benchmark]: CACSL2BoogieTranslator took 763.24ms. Allocated memory is still 207.6MB. Free memory was 156.7MB in the beginning and 141.2MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-23 22:38:25,358 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 142.6MB. Free memory is still 86.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 763.24ms. Allocated memory is still 207.6MB. Free memory was 156.7MB in the beginning and 141.2MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1051]: 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_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ --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 dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:38:28,044 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:38:28,177 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-23 22:38:28,185 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:38:28,186 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:38:28,234 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:38:28,235 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:38:28,235 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:38:28,237 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:38:28,242 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:38:28,243 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:38:28,244 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:38:28,244 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:38:28,246 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:38:28,247 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:38:28,247 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:38:28,247 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:38:28,248 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:38:28,248 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 22:38:28,249 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 22:38:28,249 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 22:38:28,250 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:38:28,250 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 22:38:28,251 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-23 22:38:28,251 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-23 22:38:28,251 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 22:38:28,252 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:38:28,252 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:38:28,253 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:38:28,254 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:38:28,255 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:38:28,255 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:38:28,256 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:38:28,256 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:38:28,257 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:38:28,257 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-23 22:38:28,257 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-23 22:38:28,257 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:38:28,258 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:38:28,259 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:38:28,259 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:38:28,259 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-23 22:38:28,260 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_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 [2023-11-23 22:38:28,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:38:28,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:38:28,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:38:28,772 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:38:28,773 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:38:28,775 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2023-11-23 22:38:31,978 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:38:32,454 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:38:32,454 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2023-11-23 22:38:32,480 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/data/15be00017/c273f424e11d4988a05c9b00408d2e2b/FLAGee5688aa5 [2023-11-23 22:38:32,500 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/data/15be00017/c273f424e11d4988a05c9b00408d2e2b [2023-11-23 22:38:32,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:38:32,508 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:38:32,511 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:38:32,512 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:38:32,517 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:38:32,518 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:38:32" (1/1) ... [2023-11-23 22:38:32,519 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d6c02af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:32, skipping insertion in model container [2023-11-23 22:38:32,519 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:38:32" (1/1) ... [2023-11-23 22:38:32,591 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:38:33,351 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 22:38:33,352 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 22:38:33,352 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 22:38:33,353 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 22:38:33,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:38:33,447 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-23 22:38:33,465 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:38:33,506 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 22:38:33,513 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 22:38:33,514 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 22:38:33,515 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 22:38:33,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:38:33,551 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:38:33,626 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 22:38:33,627 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 22:38:33,628 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 22:38:33,629 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-23 22:38:33,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:38:33,773 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:38:33,774 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:33 WrapperNode [2023-11-23 22:38:33,774 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:38:33,775 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:38:33,775 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:38:33,776 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:38:33,785 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:33" (1/1) ... [2023-11-23 22:38:33,825 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:33" (1/1) ... [2023-11-23 22:38:33,893 INFO L138 Inliner]: procedures = 283, calls = 56, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 240 [2023-11-23 22:38:33,894 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:38:33,896 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:38:33,896 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:38:33,896 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:38:33,907 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:33" (1/1) ... [2023-11-23 22:38:33,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:33" (1/1) ... [2023-11-23 22:38:33,927 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:33" (1/1) ... [2023-11-23 22:38:33,929 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:33" (1/1) ... [2023-11-23 22:38:33,956 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:33" (1/1) ... [2023-11-23 22:38:33,961 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:33" (1/1) ... [2023-11-23 22:38:33,965 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:33" (1/1) ... [2023-11-23 22:38:33,968 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:33" (1/1) ... [2023-11-23 22:38:33,973 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:38:33,974 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:38:33,975 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:38:33,975 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:38:33,976 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:33" (1/1) ... [2023-11-23 22:38:33,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:38:33,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:38:34,010 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:38:34,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:38:34,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-23 22:38:34,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:38:34,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 22:38:34,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:38:34,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-23 22:38:34,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-23 22:38:34,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2023-11-23 22:38:34,065 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-23 22:38:34,066 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-23 22:38:34,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 22:38:34,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:38:34,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 22:38:34,067 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-23 22:38:34,067 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-23 22:38:34,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:38:34,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:38:34,070 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:38:34,300 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:38:34,302 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:38:35,248 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:38:35,651 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:38:35,651 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-23 22:38:35,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:38:35 BoogieIcfgContainer [2023-11-23 22:38:35,652 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:38:35,654 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:38:35,654 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:38:35,658 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:38:35,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:38:32" (1/3) ... [2023-11-23 22:38:35,659 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6291ecfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:38:35, skipping insertion in model container [2023-11-23 22:38:35,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:33" (2/3) ... [2023-11-23 22:38:35,661 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6291ecfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:38:35, skipping insertion in model container [2023-11-23 22:38:35,662 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:38:35" (3/3) ... [2023-11-23 22:38:35,663 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_92-evilcollapse_racing-deref.i [2023-11-23 22:38:35,685 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:38:35,685 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 48 error locations. [2023-11-23 22:38:35,685 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:38:35,816 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-23 22:38:35,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 133 transitions, 273 flow [2023-11-23 22:38:35,949 INFO L124 PetriNetUnfolderBase]: 18/145 cut-off events. [2023-11-23 22:38:35,949 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-23 22:38:35,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 145 events. 18/145 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 532 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 82. Up to 4 conditions per place. [2023-11-23 22:38:35,958 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 133 transitions, 273 flow [2023-11-23 22:38:35,968 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 133 transitions, 273 flow [2023-11-23 22:38:35,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:38:36,001 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;@347c66fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:38:36,001 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2023-11-23 22:38:36,005 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:38:36,005 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-23 22:38:36,005 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:38:36,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:36,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-23 22:38:36,006 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-23 22:38:36,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:36,011 INFO L85 PathProgramCache]: Analyzing trace with hash 707740, now seen corresponding path program 1 times [2023-11-23 22:38:36,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 22:38:36,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551122395] [2023-11-23 22:38:36,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:36,024 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 [2023-11-23 22:38:36,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 22:38:36,025 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 22:38:36,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 22:38:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:36,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:38:36,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:36,254 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:38:36,255 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 22:38:36,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551122395] [2023-11-23 22:38:36,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551122395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:38:36,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:38:36,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:38:36,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623343113] [2023-11-23 22:38:36,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:36,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:38:36,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 22:38:36,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:38:36,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:38:36,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2023-11-23 22:38:36,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 133 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:36,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:36,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2023-11-23 22:38:36,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:37,134 INFO L124 PetriNetUnfolderBase]: 125/490 cut-off events. [2023-11-23 22:38:37,135 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2023-11-23 22:38:37,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769 conditions, 490 events. 125/490 cut-off events. For 5/6 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2681 event pairs, 64 based on Foata normal form. 52/431 useless extension candidates. Maximal degree in co-relation 675. Up to 177 conditions per place. [2023-11-23 22:38:37,142 INFO L140 encePairwiseOnDemand]: 112/133 looper letters, 66 selfloop transitions, 4 changer transitions 0/139 dead transitions. [2023-11-23 22:38:37,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 139 transitions, 425 flow [2023-11-23 22:38:37,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:38:37,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:38:37,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2023-11-23 22:38:37,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7048872180451128 [2023-11-23 22:38:37,161 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 375 transitions. [2023-11-23 22:38:37,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 375 transitions. [2023-11-23 22:38:37,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:37,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 375 transitions. [2023-11-23 22:38:37,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:37,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:37,178 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:37,181 INFO L175 Difference]: Start difference. First operand has 118 places, 133 transitions, 273 flow. Second operand 4 states and 375 transitions. [2023-11-23 22:38:37,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 139 transitions, 425 flow [2023-11-23 22:38:37,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 139 transitions, 425 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 22:38:37,191 INFO L231 Difference]: Finished difference. Result has 117 places, 116 transitions, 253 flow [2023-11-23 22:38:37,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=253, PETRI_PLACES=117, PETRI_TRANSITIONS=116} [2023-11-23 22:38:37,197 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2023-11-23 22:38:37,197 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 116 transitions, 253 flow [2023-11-23 22:38:37,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:37,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:37,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-23 22:38:37,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-23 22:38:37,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 22:38:37,401 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-23 22:38:37,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:37,402 INFO L85 PathProgramCache]: Analyzing trace with hash 707741, now seen corresponding path program 1 times [2023-11-23 22:38:37,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 22:38:37,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754473626] [2023-11-23 22:38:37,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:37,403 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 [2023-11-23 22:38:37,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 22:38:37,405 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 22:38:37,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 22:38:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:37,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 22:38:37,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:37,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:37,615 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:38:37,615 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 22:38:37,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754473626] [2023-11-23 22:38:37,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754473626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:38:37,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:38:37,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:38:37,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730171743] [2023-11-23 22:38:37,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:37,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:38:37,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 22:38:37,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:38:37,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:38:38,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 133 [2023-11-23 22:38:38,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 116 transitions, 253 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:38,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:38,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 133 [2023-11-23 22:38:38,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:38,589 INFO L124 PetriNetUnfolderBase]: 127/521 cut-off events. [2023-11-23 22:38:38,589 INFO L125 PetriNetUnfolderBase]: For 25/26 co-relation queries the response was YES. [2023-11-23 22:38:38,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 859 conditions, 521 events. 127/521 cut-off events. For 25/26 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2783 event pairs, 105 based on Foata normal form. 3/410 useless extension candidates. Maximal degree in co-relation 743. Up to 274 conditions per place. [2023-11-23 22:38:38,595 INFO L140 encePairwiseOnDemand]: 125/133 looper letters, 47 selfloop transitions, 5 changer transitions 0/120 dead transitions. [2023-11-23 22:38:38,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 120 transitions, 371 flow [2023-11-23 22:38:38,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:38:38,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:38:38,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 343 transitions. [2023-11-23 22:38:38,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6447368421052632 [2023-11-23 22:38:38,599 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 343 transitions. [2023-11-23 22:38:38,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 343 transitions. [2023-11-23 22:38:38,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:38,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 343 transitions. [2023-11-23 22:38:38,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:38,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:38,604 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:38,605 INFO L175 Difference]: Start difference. First operand has 117 places, 116 transitions, 253 flow. Second operand 4 states and 343 transitions. [2023-11-23 22:38:38,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 120 transitions, 371 flow [2023-11-23 22:38:38,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 120 transitions, 359 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:38:38,610 INFO L231 Difference]: Finished difference. Result has 119 places, 120 transitions, 286 flow [2023-11-23 22:38:38,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=286, PETRI_PLACES=119, PETRI_TRANSITIONS=120} [2023-11-23 22:38:38,612 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2023-11-23 22:38:38,612 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 120 transitions, 286 flow [2023-11-23 22:38:38,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:38,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:38,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 22:38:38,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 22:38:38,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 22:38:38,816 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-23 22:38:38,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:38,816 INFO L85 PathProgramCache]: Analyzing trace with hash -389891377, now seen corresponding path program 1 times [2023-11-23 22:38:38,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 22:38:38,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517631084] [2023-11-23 22:38:38,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:38,817 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 [2023-11-23 22:38:38,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 22:38:38,818 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 22:38:38,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 22:38:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:38,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:38:38,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:38,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 22:38:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:39,016 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:38:39,016 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 22:38:39,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517631084] [2023-11-23 22:38:39,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517631084] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:38:39,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:38:39,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:38:39,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958044881] [2023-11-23 22:38:39,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:39,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:38:39,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 22:38:39,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:38:39,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:38:39,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 133 [2023-11-23 22:38:39,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 120 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:39,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:39,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 133 [2023-11-23 22:38:39,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:39,652 INFO L124 PetriNetUnfolderBase]: 127/520 cut-off events. [2023-11-23 22:38:39,653 INFO L125 PetriNetUnfolderBase]: For 14/15 co-relation queries the response was YES. [2023-11-23 22:38:39,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 844 conditions, 520 events. 127/520 cut-off events. For 14/15 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2804 event pairs, 105 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 811. Up to 270 conditions per place. [2023-11-23 22:38:39,658 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 45 selfloop transitions, 3 changer transitions 0/119 dead transitions. [2023-11-23 22:38:39,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 119 transitions, 380 flow [2023-11-23 22:38:39,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:38:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:38:39,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2023-11-23 22:38:39,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6766917293233082 [2023-11-23 22:38:39,661 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2023-11-23 22:38:39,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2023-11-23 22:38:39,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:39,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2023-11-23 22:38:39,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:39,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:39,666 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:39,666 INFO L175 Difference]: Start difference. First operand has 119 places, 120 transitions, 286 flow. Second operand 3 states and 270 transitions. [2023-11-23 22:38:39,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 119 transitions, 380 flow [2023-11-23 22:38:39,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 119 transitions, 377 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:38:39,672 INFO L231 Difference]: Finished difference. Result has 119 places, 119 transitions, 287 flow [2023-11-23 22:38:39,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=287, PETRI_PLACES=119, PETRI_TRANSITIONS=119} [2023-11-23 22:38:39,673 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2023-11-23 22:38:39,674 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 119 transitions, 287 flow [2023-11-23 22:38:39,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:39,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:39,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 22:38:39,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 22:38:39,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 22:38:39,878 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-23 22:38:39,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:39,879 INFO L85 PathProgramCache]: Analyzing trace with hash -389891378, now seen corresponding path program 1 times [2023-11-23 22:38:39,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 22:38:39,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823788037] [2023-11-23 22:38:39,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:39,879 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 [2023-11-23 22:38:39,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 22:38:39,881 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 22:38:39,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 22:38:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:40,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:38:40,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:40,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 22:38:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:40,040 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:38:40,040 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 22:38:40,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823788037] [2023-11-23 22:38:40,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823788037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:38:40,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:38:40,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:38:40,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913779284] [2023-11-23 22:38:40,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:40,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:38:40,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 22:38:40,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:38:40,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:38:40,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 133 [2023-11-23 22:38:40,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 119 transitions, 287 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:40,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:40,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 133 [2023-11-23 22:38:40,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:40,524 INFO L124 PetriNetUnfolderBase]: 127/519 cut-off events. [2023-11-23 22:38:40,524 INFO L125 PetriNetUnfolderBase]: For 16/17 co-relation queries the response was YES. [2023-11-23 22:38:40,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 844 conditions, 519 events. 127/519 cut-off events. For 16/17 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2801 event pairs, 105 based on Foata normal form. 0/406 useless extension candidates. Maximal degree in co-relation 810. Up to 270 conditions per place. [2023-11-23 22:38:40,529 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 45 selfloop transitions, 3 changer transitions 0/118 dead transitions. [2023-11-23 22:38:40,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 118 transitions, 381 flow [2023-11-23 22:38:40,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:38:40,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:38:40,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2023-11-23 22:38:40,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6766917293233082 [2023-11-23 22:38:40,532 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2023-11-23 22:38:40,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2023-11-23 22:38:40,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:40,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2023-11-23 22:38:40,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:40,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:40,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:40,538 INFO L175 Difference]: Start difference. First operand has 119 places, 119 transitions, 287 flow. Second operand 3 states and 270 transitions. [2023-11-23 22:38:40,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 118 transitions, 381 flow [2023-11-23 22:38:40,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 118 transitions, 375 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:38:40,543 INFO L231 Difference]: Finished difference. Result has 118 places, 118 transitions, 285 flow [2023-11-23 22:38:40,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=285, PETRI_PLACES=118, PETRI_TRANSITIONS=118} [2023-11-23 22:38:40,545 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, 0 predicate places. [2023-11-23 22:38:40,545 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 118 transitions, 285 flow [2023-11-23 22:38:40,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:40,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:40,546 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-23 22:38:40,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:38:40,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 22:38:40,749 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-23 22:38:40,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:40,750 INFO L85 PathProgramCache]: Analyzing trace with hash 798274017, now seen corresponding path program 1 times [2023-11-23 22:38:40,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 22:38:40,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405101474] [2023-11-23 22:38:40,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:40,751 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 [2023-11-23 22:38:40,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 22:38:40,753 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 22:38:40,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 22:38:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:40,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 22:38:40,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:40,875 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:38:40,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 22:38:40,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [405101474] [2023-11-23 22:38:40,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [405101474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:38:40,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:38:40,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:38:40,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949811744] [2023-11-23 22:38:40,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:40,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:38:40,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 22:38:40,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:38:40,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:38:40,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2023-11-23 22:38:40,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 118 transitions, 285 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:40,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:40,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2023-11-23 22:38:40,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:41,205 INFO L124 PetriNetUnfolderBase]: 126/541 cut-off events. [2023-11-23 22:38:41,205 INFO L125 PetriNetUnfolderBase]: For 18/19 co-relation queries the response was YES. [2023-11-23 22:38:41,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 541 events. 126/541 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2802 event pairs, 105 based on Foata normal form. 2/419 useless extension candidates. Maximal degree in co-relation 841. Up to 270 conditions per place. [2023-11-23 22:38:41,210 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 49 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2023-11-23 22:38:41,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 122 transitions, 401 flow [2023-11-23 22:38:41,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:38:41,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:38:41,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-11-23 22:38:41,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6967418546365914 [2023-11-23 22:38:41,213 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-11-23 22:38:41,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-11-23 22:38:41,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:41,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-11-23 22:38:41,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:41,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:41,217 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:41,217 INFO L175 Difference]: Start difference. First operand has 118 places, 118 transitions, 285 flow. Second operand 3 states and 278 transitions. [2023-11-23 22:38:41,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 122 transitions, 401 flow [2023-11-23 22:38:41,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 122 transitions, 391 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:38:41,222 INFO L231 Difference]: Finished difference. Result has 119 places, 118 transitions, 290 flow [2023-11-23 22:38:41,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=119, PETRI_TRANSITIONS=118} [2023-11-23 22:38:41,223 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2023-11-23 22:38:41,223 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 118 transitions, 290 flow [2023-11-23 22:38:41,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:41,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:41,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:41,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 22:38:41,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 22:38:41,427 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-23 22:38:41,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:41,428 INFO L85 PathProgramCache]: Analyzing trace with hash 798269908, now seen corresponding path program 1 times [2023-11-23 22:38:41,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 22:38:41,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227911637] [2023-11-23 22:38:41,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:41,429 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 [2023-11-23 22:38:41,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 22:38:41,430 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 22:38:41,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 22:38:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:41,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 22:38:41,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:41,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 22:38:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:41,663 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:38:41,663 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 22:38:41,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227911637] [2023-11-23 22:38:41,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227911637] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:38:41,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:38:41,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:38:41,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648635465] [2023-11-23 22:38:41,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:41,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:38:41,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 22:38:41,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:38:41,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:38:42,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 133 [2023-11-23 22:38:42,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 118 transitions, 290 flow. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:42,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:42,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 133 [2023-11-23 22:38:42,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:42,476 INFO L124 PetriNetUnfolderBase]: 126/537 cut-off events. [2023-11-23 22:38:42,477 INFO L125 PetriNetUnfolderBase]: For 33/34 co-relation queries the response was YES. [2023-11-23 22:38:42,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 537 events. 126/537 cut-off events. For 33/34 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2814 event pairs, 105 based on Foata normal form. 2/419 useless extension candidates. Maximal degree in co-relation 837. Up to 274 conditions per place. [2023-11-23 22:38:42,481 INFO L140 encePairwiseOnDemand]: 128/133 looper letters, 46 selfloop transitions, 4 changer transitions 0/116 dead transitions. [2023-11-23 22:38:42,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 116 transitions, 386 flow [2023-11-23 22:38:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:38:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:38:42,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 332 transitions. [2023-11-23 22:38:42,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6240601503759399 [2023-11-23 22:38:42,485 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 332 transitions. [2023-11-23 22:38:42,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 332 transitions. [2023-11-23 22:38:42,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:42,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 332 transitions. [2023-11-23 22:38:42,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:42,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:42,490 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:42,490 INFO L175 Difference]: Start difference. First operand has 119 places, 118 transitions, 290 flow. Second operand 4 states and 332 transitions. [2023-11-23 22:38:42,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 116 transitions, 386 flow [2023-11-23 22:38:42,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 116 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:38:42,495 INFO L231 Difference]: Finished difference. Result has 119 places, 116 transitions, 291 flow [2023-11-23 22:38:42,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=291, PETRI_PLACES=119, PETRI_TRANSITIONS=116} [2023-11-23 22:38:42,496 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2023-11-23 22:38:42,497 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 116 transitions, 291 flow [2023-11-23 22:38:42,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:42,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:42,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:42,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-23 22:38:42,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 22:38:42,701 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-23 22:38:42,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:42,701 INFO L85 PathProgramCache]: Analyzing trace with hash 798269907, now seen corresponding path program 1 times [2023-11-23 22:38:42,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 22:38:42,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316147169] [2023-11-23 22:38:42,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:42,702 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 [2023-11-23 22:38:42,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 22:38:42,703 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 22:38:42,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 22:38:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:42,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:38:42,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:42,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 22:38:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:42,897 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:38:42,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 22:38:42,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316147169] [2023-11-23 22:38:42,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316147169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:38:42,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:38:42,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:38:42,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004253358] [2023-11-23 22:38:42,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:42,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:38:42,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 22:38:42,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:38:42,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:38:43,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2023-11-23 22:38:43,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 116 transitions, 291 flow. Second operand has 4 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:43,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:43,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2023-11-23 22:38:43,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:43,668 INFO L124 PetriNetUnfolderBase]: 126/533 cut-off events. [2023-11-23 22:38:43,669 INFO L125 PetriNetUnfolderBase]: For 18/19 co-relation queries the response was YES. [2023-11-23 22:38:43,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 876 conditions, 533 events. 126/533 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2783 event pairs, 105 based on Foata normal form. 2/417 useless extension candidates. Maximal degree in co-relation 841. Up to 272 conditions per place. [2023-11-23 22:38:43,674 INFO L140 encePairwiseOnDemand]: 126/133 looper letters, 43 selfloop transitions, 7 changer transitions 0/114 dead transitions. [2023-11-23 22:38:43,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 114 transitions, 387 flow [2023-11-23 22:38:43,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:38:43,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:38:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 393 transitions. [2023-11-23 22:38:43,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909774436090226 [2023-11-23 22:38:43,678 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 393 transitions. [2023-11-23 22:38:43,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 393 transitions. [2023-11-23 22:38:43,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:43,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 393 transitions. [2023-11-23 22:38:43,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 78.6) internal successors, (393), 5 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:43,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:43,684 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:43,684 INFO L175 Difference]: Start difference. First operand has 119 places, 116 transitions, 291 flow. Second operand 5 states and 393 transitions. [2023-11-23 22:38:43,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 114 transitions, 387 flow [2023-11-23 22:38:43,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 114 transitions, 379 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:38:43,691 INFO L231 Difference]: Finished difference. Result has 118 places, 114 transitions, 293 flow [2023-11-23 22:38:43,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=293, PETRI_PLACES=118, PETRI_TRANSITIONS=114} [2023-11-23 22:38:43,693 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, 0 predicate places. [2023-11-23 22:38:43,693 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 114 transitions, 293 flow [2023-11-23 22:38:43,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:43,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:43,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:43,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 22:38:43,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 22:38:43,899 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-23 22:38:43,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:43,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1661742016, now seen corresponding path program 1 times [2023-11-23 22:38:43,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 22:38:43,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717372804] [2023-11-23 22:38:43,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:43,900 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 [2023-11-23 22:38:43,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 22:38:43,901 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 22:38:43,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 22:38:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:44,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 22:38:44,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:44,280 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-23 22:38:44,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-23 22:38:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:44,333 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:38:44,333 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 22:38:44,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717372804] [2023-11-23 22:38:44,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717372804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:38:44,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:38:44,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:38:44,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26612780] [2023-11-23 22:38:44,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:44,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:38:44,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 22:38:44,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:38:44,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:38:44,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 133 [2023-11-23 22:38:44,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 114 transitions, 293 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:44,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:44,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 133 [2023-11-23 22:38:44,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:45,068 INFO L124 PetriNetUnfolderBase]: 125/503 cut-off events. [2023-11-23 22:38:45,068 INFO L125 PetriNetUnfolderBase]: For 27/28 co-relation queries the response was YES. [2023-11-23 22:38:45,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 850 conditions, 503 events. 125/503 cut-off events. For 27/28 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2623 event pairs, 64 based on Foata normal form. 2/397 useless extension candidates. Maximal degree in co-relation 813. Up to 180 conditions per place. [2023-11-23 22:38:45,072 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 67 selfloop transitions, 5 changer transitions 0/135 dead transitions. [2023-11-23 22:38:45,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 135 transitions, 479 flow [2023-11-23 22:38:45,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:38:45,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:38:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 354 transitions. [2023-11-23 22:38:45,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6654135338345865 [2023-11-23 22:38:45,075 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 354 transitions. [2023-11-23 22:38:45,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 354 transitions. [2023-11-23 22:38:45,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:45,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 354 transitions. [2023-11-23 22:38:45,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.5) internal successors, (354), 4 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:45,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:45,079 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:45,080 INFO L175 Difference]: Start difference. First operand has 118 places, 114 transitions, 293 flow. Second operand 4 states and 354 transitions. [2023-11-23 22:38:45,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 135 transitions, 479 flow [2023-11-23 22:38:45,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 135 transitions, 465 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-23 22:38:45,084 INFO L231 Difference]: Finished difference. Result has 115 places, 112 transitions, 285 flow [2023-11-23 22:38:45,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=115, PETRI_TRANSITIONS=112} [2023-11-23 22:38:45,085 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, -3 predicate places. [2023-11-23 22:38:45,086 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 112 transitions, 285 flow [2023-11-23 22:38:45,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:45,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:45,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:45,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 22:38:45,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 22:38:45,292 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-23 22:38:45,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:45,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1661742015, now seen corresponding path program 1 times [2023-11-23 22:38:45,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 22:38:45,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260168188] [2023-11-23 22:38:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:45,294 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 [2023-11-23 22:38:45,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 22:38:45,295 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 22:38:45,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 22:38:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:45,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 22:38:45,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:45,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:38:45,637 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 [2023-11-23 22:38:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:45,729 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:38:45,730 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 22:38:45,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260168188] [2023-11-23 22:38:45,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260168188] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:38:45,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:38:45,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:38:45,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419379027] [2023-11-23 22:38:45,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:45,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:38:45,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 22:38:45,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:38:45,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:38:46,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 133 [2023-11-23 22:38:46,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 112 transitions, 285 flow. Second operand has 5 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:46,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:46,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 133 [2023-11-23 22:38:46,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:46,807 INFO L124 PetriNetUnfolderBase]: 128/561 cut-off events. [2023-11-23 22:38:46,807 INFO L125 PetriNetUnfolderBase]: For 52/53 co-relation queries the response was YES. [2023-11-23 22:38:46,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 561 events. 128/561 cut-off events. For 52/53 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3037 event pairs, 106 based on Foata normal form. 2/435 useless extension candidates. Maximal degree in co-relation 857. Up to 281 conditions per place. [2023-11-23 22:38:46,812 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 53 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2023-11-23 22:38:46,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 119 transitions, 431 flow [2023-11-23 22:38:46,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:38:46,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:38:46,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 341 transitions. [2023-11-23 22:38:46,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6409774436090225 [2023-11-23 22:38:46,815 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 341 transitions. [2023-11-23 22:38:46,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 341 transitions. [2023-11-23 22:38:46,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:46,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 341 transitions. [2023-11-23 22:38:46,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:46,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:46,819 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:46,819 INFO L175 Difference]: Start difference. First operand has 115 places, 112 transitions, 285 flow. Second operand 4 states and 341 transitions. [2023-11-23 22:38:46,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 119 transitions, 431 flow [2023-11-23 22:38:46,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 119 transitions, 415 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:38:46,824 INFO L231 Difference]: Finished difference. Result has 117 places, 116 transitions, 321 flow [2023-11-23 22:38:46,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=321, PETRI_PLACES=117, PETRI_TRANSITIONS=116} [2023-11-23 22:38:46,825 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2023-11-23 22:38:46,825 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 116 transitions, 321 flow [2023-11-23 22:38:46,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:46,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:46,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:46,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-11-23 22:38:47,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 22:38:47,031 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-23 22:38:47,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:47,031 INFO L85 PathProgramCache]: Analyzing trace with hash 25605848, now seen corresponding path program 1 times [2023-11-23 22:38:47,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 22:38:47,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094519642] [2023-11-23 22:38:47,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:47,032 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 [2023-11-23 22:38:47,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 22:38:47,033 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 22:38:47,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 22:38:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:47,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-23 22:38:47,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:47,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-11-23 22:38:47,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-11-23 22:38:47,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 18 [2023-11-23 22:38:47,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 18 [2023-11-23 22:38:47,713 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-23 22:38:47,713 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 13 [2023-11-23 22:38:47,761 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 22:38:47,762 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 [2023-11-23 22:38:47,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 16 [2023-11-23 22:38:47,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 16 [2023-11-23 22:38:47,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 16 [2023-11-23 22:38:47,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 16 [2023-11-23 22:38:48,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 16 [2023-11-23 22:38:48,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 16 [2023-11-23 22:38:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:48,256 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:38:48,256 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 22:38:48,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094519642] [2023-11-23 22:38:48,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094519642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:38:48,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:38:48,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 22:38:48,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332081935] [2023-11-23 22:38:48,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:48,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:38:48,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 22:38:48,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:38:48,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:38:51,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 133 [2023-11-23 22:38:51,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 116 transitions, 321 flow. Second operand has 10 states, 10 states have (on average 56.0) internal successors, (560), 10 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:51,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:51,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 133 [2023-11-23 22:38:51,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:53,127 INFO L124 PetriNetUnfolderBase]: 152/618 cut-off events. [2023-11-23 22:38:53,127 INFO L125 PetriNetUnfolderBase]: For 25/26 co-relation queries the response was YES. [2023-11-23 22:38:53,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 618 events. 152/618 cut-off events. For 25/26 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3396 event pairs, 127 based on Foata normal form. 0/509 useless extension candidates. Maximal degree in co-relation 972. Up to 340 conditions per place. [2023-11-23 22:38:53,133 INFO L140 encePairwiseOnDemand]: 121/133 looper letters, 69 selfloop transitions, 11 changer transitions 0/132 dead transitions. [2023-11-23 22:38:53,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 132 transitions, 519 flow [2023-11-23 22:38:53,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 22:38:53,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-23 22:38:53,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 685 transitions. [2023-11-23 22:38:53,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46821599453178403 [2023-11-23 22:38:53,139 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 685 transitions. [2023-11-23 22:38:53,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 685 transitions. [2023-11-23 22:38:53,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:53,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 685 transitions. [2023-11-23 22:38:53,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 62.27272727272727) internal successors, (685), 11 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:53,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:53,147 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:53,147 INFO L175 Difference]: Start difference. First operand has 117 places, 116 transitions, 321 flow. Second operand 11 states and 685 transitions. [2023-11-23 22:38:53,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 132 transitions, 519 flow [2023-11-23 22:38:53,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 132 transitions, 517 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:38:53,152 INFO L231 Difference]: Finished difference. Result has 131 places, 121 transitions, 377 flow [2023-11-23 22:38:53,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=377, PETRI_PLACES=131, PETRI_TRANSITIONS=121} [2023-11-23 22:38:53,157 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, 13 predicate places. [2023-11-23 22:38:53,158 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 121 transitions, 377 flow [2023-11-23 22:38:53,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.0) internal successors, (560), 10 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:53,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:53,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:53,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 22:38:53,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 22:38:53,366 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-23 22:38:53,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:53,366 INFO L85 PathProgramCache]: Analyzing trace with hash 25605847, now seen corresponding path program 1 times [2023-11-23 22:38:53,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 22:38:53,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202407626] [2023-11-23 22:38:53,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:53,367 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 [2023-11-23 22:38:53,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 22:38:53,368 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 22:38:53,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 22:38:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:53,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 22:38:53,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:53,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-11-23 22:38:53,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 28 treesize of output 27 [2023-11-23 22:38:53,930 INFO L349 Elim1Store]: treesize reduction 17, result has 19.0 percent of original size [2023-11-23 22:38:53,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 16 [2023-11-23 22:38:54,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 32 treesize of output 25 [2023-11-23 22:38:54,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 32 treesize of output 25 [2023-11-23 22:38:54,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 25 treesize of output 18 [2023-11-23 22:38:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:54,234 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:38:54,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 22:38:54,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202407626] [2023-11-23 22:38:54,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202407626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:38:54,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:38:54,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 22:38:54,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663600161] [2023-11-23 22:38:54,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:54,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:38:54,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 22:38:54,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:38:54,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:38:56,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 133 [2023-11-23 22:38:56,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 121 transitions, 377 flow. Second operand has 10 states, 10 states have (on average 62.0) internal successors, (620), 10 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:56,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:56,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 133 [2023-11-23 22:38:56,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:58,041 INFO L124 PetriNetUnfolderBase]: 150/588 cut-off events. [2023-11-23 22:38:58,042 INFO L125 PetriNetUnfolderBase]: For 36/37 co-relation queries the response was YES. [2023-11-23 22:38:58,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1061 conditions, 588 events. 150/588 cut-off events. For 36/37 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3250 event pairs, 85 based on Foata normal form. 2/490 useless extension candidates. Maximal degree in co-relation 981. Up to 238 conditions per place. [2023-11-23 22:38:58,046 INFO L140 encePairwiseOnDemand]: 121/133 looper letters, 76 selfloop transitions, 20 changer transitions 0/152 dead transitions. [2023-11-23 22:38:58,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 152 transitions, 641 flow [2023-11-23 22:38:58,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 22:38:58,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-23 22:38:58,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 756 transitions. [2023-11-23 22:38:58,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5167464114832536 [2023-11-23 22:38:58,052 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 756 transitions. [2023-11-23 22:38:58,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 756 transitions. [2023-11-23 22:38:58,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:58,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 756 transitions. [2023-11-23 22:38:58,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 68.72727272727273) internal successors, (756), 11 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:58,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:58,061 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:58,061 INFO L175 Difference]: Start difference. First operand has 131 places, 121 transitions, 377 flow. Second operand 11 states and 756 transitions. [2023-11-23 22:38:58,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 152 transitions, 641 flow [2023-11-23 22:38:58,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 152 transitions, 637 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:38:58,068 INFO L231 Difference]: Finished difference. Result has 144 places, 126 transitions, 465 flow [2023-11-23 22:38:58,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=465, PETRI_PLACES=144, PETRI_TRANSITIONS=126} [2023-11-23 22:38:58,069 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, 26 predicate places. [2023-11-23 22:38:58,070 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 126 transitions, 465 flow [2023-11-23 22:38:58,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 62.0) internal successors, (620), 10 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:58,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:58,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:58,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 22:38:58,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 22:38:58,277 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-23 22:38:58,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:58,277 INFO L85 PathProgramCache]: Analyzing trace with hash 793781936, now seen corresponding path program 1 times [2023-11-23 22:38:58,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 22:38:58,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671356948] [2023-11-23 22:38:58,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:58,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 22:38:58,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 22:38:58,279 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 22:38:58,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 22:38:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:58,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 22:38:58,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:58,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 22:38:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:58,553 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:38:58,553 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 22:38:58,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671356948] [2023-11-23 22:38:58,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671356948] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:38:58,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:38:58,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:38:58,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102540308] [2023-11-23 22:38:58,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:58,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:38:58,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 22:38:58,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:38:58,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:38:59,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 133 [2023-11-23 22:38:59,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 126 transitions, 465 flow. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:59,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:59,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 133 [2023-11-23 22:38:59,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:59,521 INFO L124 PetriNetUnfolderBase]: 127/548 cut-off events. [2023-11-23 22:38:59,521 INFO L125 PetriNetUnfolderBase]: For 121/122 co-relation queries the response was YES. [2023-11-23 22:38:59,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1017 conditions, 548 events. 127/548 cut-off events. For 121/122 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2939 event pairs, 105 based on Foata normal form. 8/447 useless extension candidates. Maximal degree in co-relation 928. Up to 271 conditions per place. [2023-11-23 22:38:59,527 INFO L140 encePairwiseOnDemand]: 128/133 looper letters, 48 selfloop transitions, 11 changer transitions 0/124 dead transitions. [2023-11-23 22:38:59,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 124 transitions, 579 flow [2023-11-23 22:38:59,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:38:59,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:38:59,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 338 transitions. [2023-11-23 22:38:59,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6353383458646616 [2023-11-23 22:38:59,532 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 338 transitions. [2023-11-23 22:38:59,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 338 transitions. [2023-11-23 22:38:59,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:59,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 338 transitions. [2023-11-23 22:38:59,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 84.5) internal successors, (338), 4 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:59,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:59,537 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:59,537 INFO L175 Difference]: Start difference. First operand has 144 places, 126 transitions, 465 flow. Second operand 4 states and 338 transitions. [2023-11-23 22:38:59,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 124 transitions, 579 flow [2023-11-23 22:38:59,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 124 transitions, 555 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-23 22:38:59,545 INFO L231 Difference]: Finished difference. Result has 140 places, 124 transitions, 459 flow [2023-11-23 22:38:59,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=459, PETRI_PLACES=140, PETRI_TRANSITIONS=124} [2023-11-23 22:38:59,549 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, 22 predicate places. [2023-11-23 22:38:59,549 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 124 transitions, 459 flow [2023-11-23 22:38:59,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:59,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:59,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:59,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-23 22:38:59,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 22:38:59,755 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-23 22:38:59,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:59,755 INFO L85 PathProgramCache]: Analyzing trace with hash 793781935, now seen corresponding path program 1 times [2023-11-23 22:38:59,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 22:38:59,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065549003] [2023-11-23 22:38:59,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:59,756 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 [2023-11-23 22:38:59,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 22:38:59,756 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 22:38:59,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-23 22:38:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:59,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:38:59,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:59,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 22:39:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:00,023 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:39:00,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 22:39:00,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065549003] [2023-11-23 22:39:00,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065549003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:39:00,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:39:00,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:39:00,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149487735] [2023-11-23 22:39:00,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:39:00,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:39:00,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 22:39:00,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:39:00,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:39:00,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 133 [2023-11-23 22:39:00,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 124 transitions, 459 flow. Second operand has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:00,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:00,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 133 [2023-11-23 22:39:00,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:00,673 INFO L124 PetriNetUnfolderBase]: 127/540 cut-off events. [2023-11-23 22:39:00,673 INFO L125 PetriNetUnfolderBase]: For 117/118 co-relation queries the response was YES. [2023-11-23 22:39:00,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 993 conditions, 540 events. 127/540 cut-off events. For 117/118 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2897 event pairs, 105 based on Foata normal form. 0/438 useless extension candidates. Maximal degree in co-relation 905. Up to 271 conditions per place. [2023-11-23 22:39:00,679 INFO L140 encePairwiseOnDemand]: 128/133 looper letters, 50 selfloop transitions, 11 changer transitions 0/122 dead transitions. [2023-11-23 22:39:00,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 122 transitions, 577 flow [2023-11-23 22:39:00,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:39:00,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:39:00,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 332 transitions. [2023-11-23 22:39:00,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6240601503759399 [2023-11-23 22:39:00,682 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 332 transitions. [2023-11-23 22:39:00,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 332 transitions. [2023-11-23 22:39:00,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:00,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 332 transitions. [2023-11-23 22:39:00,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:00,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:00,686 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:00,687 INFO L175 Difference]: Start difference. First operand has 140 places, 124 transitions, 459 flow. Second operand 4 states and 332 transitions. [2023-11-23 22:39:00,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 122 transitions, 577 flow [2023-11-23 22:39:00,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 122 transitions, 555 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:39:00,693 INFO L231 Difference]: Finished difference. Result has 138 places, 122 transitions, 455 flow [2023-11-23 22:39:00,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=455, PETRI_PLACES=138, PETRI_TRANSITIONS=122} [2023-11-23 22:39:00,694 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, 20 predicate places. [2023-11-23 22:39:00,695 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 122 transitions, 455 flow [2023-11-23 22:39:00,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:00,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:00,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:00,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-23 22:39:00,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 22:39:00,908 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-23 22:39:00,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:00,908 INFO L85 PathProgramCache]: Analyzing trace with hash 229381132, now seen corresponding path program 1 times [2023-11-23 22:39:00,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 22:39:00,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930714816] [2023-11-23 22:39:00,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:00,909 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 [2023-11-23 22:39:00,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 22:39:00,910 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 22:39:00,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-23 22:39:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:01,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:39:01,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:39:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:01,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:39:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:01,196 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 22:39:01,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930714816] [2023-11-23 22:39:01,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [930714816] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:39:01,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:39:01,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-23 22:39:01,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796587542] [2023-11-23 22:39:01,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:39:01,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:39:01,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 22:39:01,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:39:01,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:39:01,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2023-11-23 22:39:01,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 122 transitions, 455 flow. Second operand has 6 states, 6 states have (on average 78.83333333333333) internal successors, (473), 6 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:01,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:01,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2023-11-23 22:39:01,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:01,802 INFO L124 PetriNetUnfolderBase]: 127/590 cut-off events. [2023-11-23 22:39:01,803 INFO L125 PetriNetUnfolderBase]: For 212/213 co-relation queries the response was YES. [2023-11-23 22:39:01,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1131 conditions, 590 events. 127/590 cut-off events. For 212/213 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3015 event pairs, 105 based on Foata normal form. 6/494 useless extension candidates. Maximal degree in co-relation 968. Up to 267 conditions per place. [2023-11-23 22:39:01,808 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 63 selfloop transitions, 11 changer transitions 0/137 dead transitions. [2023-11-23 22:39:01,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 137 transitions, 715 flow [2023-11-23 22:39:01,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:39:01,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:39:01,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 519 transitions. [2023-11-23 22:39:01,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.650375939849624 [2023-11-23 22:39:01,812 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 519 transitions. [2023-11-23 22:39:01,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 519 transitions. [2023-11-23 22:39:01,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:01,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 519 transitions. [2023-11-23 22:39:01,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 86.5) internal successors, (519), 6 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:01,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 133.0) internal successors, (931), 7 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:01,817 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 133.0) internal successors, (931), 7 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:01,818 INFO L175 Difference]: Start difference. First operand has 138 places, 122 transitions, 455 flow. Second operand 6 states and 519 transitions. [2023-11-23 22:39:01,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 137 transitions, 715 flow [2023-11-23 22:39:01,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 137 transitions, 671 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:39:01,827 INFO L231 Difference]: Finished difference. Result has 144 places, 127 transitions, 521 flow [2023-11-23 22:39:01,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=521, PETRI_PLACES=144, PETRI_TRANSITIONS=127} [2023-11-23 22:39:01,829 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, 26 predicate places. [2023-11-23 22:39:01,829 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 127 transitions, 521 flow [2023-11-23 22:39:01,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.83333333333333) internal successors, (473), 6 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:01,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:01,830 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:01,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-23 22:39:02,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 22:39:02,034 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-23 22:39:02,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:02,035 INFO L85 PathProgramCache]: Analyzing trace with hash 79870051, now seen corresponding path program 1 times [2023-11-23 22:39:02,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 22:39:02,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578235480] [2023-11-23 22:39:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:02,036 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 [2023-11-23 22:39:02,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 22:39:02,038 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 22:39:02,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-23 22:39:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:02,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-23 22:39:02,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:39:02,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 22:39:02,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 1 [2023-11-23 22:39:02,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2023-11-23 22:39:02,901 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 22:39:02,902 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 [2023-11-23 22:39:02,936 INFO L349 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2023-11-23 22:39:02,937 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 20 treesize of output 22 [2023-11-23 22:39:03,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 15 [2023-11-23 22:39:03,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 22 treesize of output 17 [2023-11-23 22:39:03,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 15 [2023-11-23 22:39:03,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 22 treesize of output 17 [2023-11-23 22:39:03,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 18 treesize of output 13 [2023-11-23 22:39:03,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-11-23 22:39:03,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 9 [2023-11-23 22:39:03,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2023-11-23 22:39:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:03,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:39:03,575 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_621 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_622 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_621) |c_~#c~0.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_622) |c_~#c~0.base|) .cse0)))) (forall ((v_ArrVal_621 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_621) |c_~#c~0.base|) .cse0))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2023-11-23 22:39:03,650 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_621 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_621) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_621 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_622 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_621) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_622) |c_~#c~0.base|) .cse1)))))) is different from false [2023-11-23 22:39:04,207 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:39:04,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 108 treesize of output 109 [2023-11-23 22:39:04,230 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:39:04,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 100 treesize of output 85 [2023-11-23 22:39:04,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:39:04,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 118 treesize of output 121 [2023-11-23 22:39:04,350 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:39:04,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 184 treesize of output 163 [2023-11-23 22:39:04,369 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 91 treesize of output 85 [2023-11-23 22:39:04,382 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 85 treesize of output 79 [2023-11-23 22:39:04,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:39:04,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 112 [2023-11-23 22:39:04,538 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 75 treesize of output 63 [2023-11-23 22:39:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-11-23 22:39:06,972 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 22:39:06,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578235480] [2023-11-23 22:39:06,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578235480] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:39:06,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:39:06,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-23 22:39:06,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760862330] [2023-11-23 22:39:06,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:39:06,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 22:39:06,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 22:39:06,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 22:39:06,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=152, Unknown=4, NotChecked=50, Total=240 [2023-11-23 22:39:07,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 133 [2023-11-23 22:39:07,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 127 transitions, 521 flow. Second operand has 16 states, 16 states have (on average 22.125) internal successors, (354), 16 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:07,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:07,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 133 [2023-11-23 22:39:07,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:12,512 INFO L124 PetriNetUnfolderBase]: 465/1264 cut-off events. [2023-11-23 22:39:12,513 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2023-11-23 22:39:12,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2561 conditions, 1264 events. 465/1264 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7535 event pairs, 422 based on Foata normal form. 6/843 useless extension candidates. Maximal degree in co-relation 2384. Up to 955 conditions per place. [2023-11-23 22:39:12,525 INFO L140 encePairwiseOnDemand]: 124/133 looper letters, 89 selfloop transitions, 23 changer transitions 0/132 dead transitions. [2023-11-23 22:39:12,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 132 transitions, 759 flow [2023-11-23 22:39:12,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 22:39:12,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-23 22:39:12,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 316 transitions. [2023-11-23 22:39:12,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21599453178400546 [2023-11-23 22:39:12,530 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 316 transitions. [2023-11-23 22:39:12,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 316 transitions. [2023-11-23 22:39:12,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:12,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 316 transitions. [2023-11-23 22:39:12,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 28.727272727272727) internal successors, (316), 11 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) [2023-11-23 22:39:12,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:12,535 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 133.0) internal successors, (1596), 12 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:12,535 INFO L175 Difference]: Start difference. First operand has 144 places, 127 transitions, 521 flow. Second operand 11 states and 316 transitions. [2023-11-23 22:39:12,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 132 transitions, 759 flow [2023-11-23 22:39:12,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 132 transitions, 739 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-23 22:39:12,542 INFO L231 Difference]: Finished difference. Result has 154 places, 128 transitions, 555 flow [2023-11-23 22:39:12,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=555, PETRI_PLACES=154, PETRI_TRANSITIONS=128} [2023-11-23 22:39:12,543 INFO L281 CegarLoopForPetriNet]: 118 programPoint places, 36 predicate places. [2023-11-23 22:39:12,543 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 128 transitions, 555 flow [2023-11-23 22:39:12,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.125) internal successors, (354), 16 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:12,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:12,544 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:12,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-23 22:39:12,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 22:39:12,756 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-23 22:39:12,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:12,757 INFO L85 PathProgramCache]: Analyzing trace with hash 79870050, now seen corresponding path program 1 times [2023-11-23 22:39:12,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 22:39:12,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378291014] [2023-11-23 22:39:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:12,757 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 [2023-11-23 22:39:12,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 22:39:12,758 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 22:39:12,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57cb153e-fd85-46cd-9d99-a316fe6bebb3/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-23 22:39:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:13,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-23 22:39:13,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:39:13,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7