./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c1d27b7f98ac68d2da6120346c107c87df7f6f708200f0d5d2c806741122116e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:09:00,086 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:09:00,149 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 03:09:00,153 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:09:00,154 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:09:00,177 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:09:00,177 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:09:00,178 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:09:00,179 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:09:00,179 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:09:00,180 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:09:00,180 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:09:00,181 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:09:00,181 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:09:00,182 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:09:00,183 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:09:00,183 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:09:00,184 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:09:00,184 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:09:00,184 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:09:00,185 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 03:09:00,186 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 03:09:00,186 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 03:09:00,186 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:09:00,187 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 03:09:00,187 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 03:09:00,188 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:09:00,188 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:09:00,188 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:09:00,189 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:09:00,189 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:09:00,189 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:09:00,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:09:00,190 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:09:00,190 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:09:00,190 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:09:00,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:09:00,191 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:09:00,191 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:09:00,191 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:09:00,191 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:09:00,192 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_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1d27b7f98ac68d2da6120346c107c87df7f6f708200f0d5d2c806741122116e [2023-11-29 03:09:00,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:09:00,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:09:00,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:09:00,453 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:09:00,453 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:09:00,455 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2023-11-29 03:09:03,207 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:09:03,364 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:09:03,365 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2023-11-29 03:09:03,373 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/data/0eb136012/b85fb96ad4b7470f89187d1a2afec448/FLAG0bf452b9c [2023-11-29 03:09:03,385 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/data/0eb136012/b85fb96ad4b7470f89187d1a2afec448 [2023-11-29 03:09:03,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:09:03,389 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:09:03,390 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:09:03,390 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:09:03,395 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:09:03,395 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:09:03" (1/1) ... [2023-11-29 03:09:03,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@196300d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:09:03, skipping insertion in model container [2023-11-29 03:09:03,397 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:09:03" (1/1) ... [2023-11-29 03:09:03,420 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:09:03,572 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:09:03,584 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-29 03:09:03,584 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2c9fe01e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:09:03, skipping insertion in model container [2023-11-29 03:09:03,584 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:09:03,585 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-29 03:09:03,587 INFO L158 Benchmark]: Toolchain (without parser) took 196.49ms. Allocated memory is still 148.9MB. Free memory was 109.5MB in the beginning and 99.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 03:09:03,587 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 148.9MB. Free memory is still 118.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 03:09:03,588 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.51ms. Allocated memory is still 148.9MB. Free memory was 109.0MB in the beginning and 99.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 03:09:03,589 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 148.9MB. Free memory is still 118.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 194.51ms. Allocated memory is still 148.9MB. Free memory was 109.0MB in the beginning and 99.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 111]: 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_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c1d27b7f98ac68d2da6120346c107c87df7f6f708200f0d5d2c806741122116e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:09:05,490 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:09:05,573 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 03:09:05,579 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:09:05,587 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:09:05,621 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:09:05,621 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:09:05,622 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:09:05,623 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:09:05,624 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:09:05,625 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:09:05,625 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:09:05,626 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:09:05,627 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:09:05,628 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:09:05,629 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:09:05,629 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:09:05,630 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:09:05,631 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:09:05,631 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:09:05,632 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 03:09:05,636 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 03:09:05,636 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 03:09:05,636 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:09:05,637 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 03:09:05,637 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 03:09:05,638 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 03:09:05,638 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 03:09:05,639 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:09:05,639 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:09:05,640 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:09:05,640 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:09:05,641 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:09:05,641 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:09:05,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:09:05,642 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:09:05,642 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:09:05,642 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 03:09:05,643 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 03:09:05,643 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:09:05,643 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:09:05,644 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:09:05,644 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:09:05,644 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 03:09:05,644 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_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1d27b7f98ac68d2da6120346c107c87df7f6f708200f0d5d2c806741122116e [2023-11-29 03:09:05,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:09:06,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:09:06,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:09:06,030 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:09:06,031 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:09:06,032 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2023-11-29 03:09:08,855 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:09:09,056 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:09:09,057 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2023-11-29 03:09:09,065 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/data/3b8267673/ea06583d19b14c71b3b9d754b7054338/FLAG80e25f874 [2023-11-29 03:09:09,079 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/data/3b8267673/ea06583d19b14c71b3b9d754b7054338 [2023-11-29 03:09:09,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:09:09,084 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:09:09,085 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:09:09,086 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:09:09,091 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:09:09,091 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:09:09" (1/1) ... [2023-11-29 03:09:09,092 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b952bf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:09:09, skipping insertion in model container [2023-11-29 03:09:09,093 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:09:09" (1/1) ... [2023-11-29 03:09:09,119 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:09:09,314 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:09:09,331 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 03:09:09,338 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:09:09,362 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:09:09,369 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:09:09,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:09:09,412 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 03:09:09,413 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 03:09:09,420 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:09:09,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:09:09 WrapperNode [2023-11-29 03:09:09,421 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:09:09,422 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:09:09,422 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:09:09,422 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:09:09,429 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:09:09" (1/1) ... [2023-11-29 03:09:09,443 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:09:09" (1/1) ... [2023-11-29 03:09:09,475 INFO L138 Inliner]: procedures = 28, calls = 45, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 157 [2023-11-29 03:09:09,475 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:09:09,477 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:09:09,477 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:09:09,477 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:09:09,487 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:09:09" (1/1) ... [2023-11-29 03:09:09,488 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:09:09" (1/1) ... [2023-11-29 03:09:09,494 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:09:09" (1/1) ... [2023-11-29 03:09:09,517 INFO L175 MemorySlicer]: Split 17 memory accesses to 5 slices as follows [2, 2, 9, 2, 2]. 53 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 1, 4, 1, 1]. [2023-11-29 03:09:09,527 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:09:09" (1/1) ... [2023-11-29 03:09:09,527 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:09:09" (1/1) ... [2023-11-29 03:09:09,543 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:09:09" (1/1) ... [2023-11-29 03:09:09,548 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:09:09" (1/1) ... [2023-11-29 03:09:09,551 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:09:09" (1/1) ... [2023-11-29 03:09:09,554 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:09:09" (1/1) ... [2023-11-29 03:09:09,559 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:09:09,560 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:09:09,561 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:09:09,561 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:09:09,562 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:09:09" (1/1) ... [2023-11-29 03:09:09,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:09:09,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:09:09,610 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:09:09,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:09:09,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:09:09,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 03:09:09,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 03:09:09,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 03:09:09,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 03:09:09,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-29 03:09:09,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 03:09:09,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 03:09:09,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 03:09:09,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 03:09:09,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 03:09:09,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-29 03:09:09,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 03:09:09,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 03:09:09,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 03:09:09,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 03:09:09,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 03:09:09,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 03:09:09,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 03:09:09,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 03:09:09,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 03:09:09,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:09:09,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:09:09,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 03:09:09,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 03:09:09,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 03:09:09,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 03:09:09,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 03:09:09,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-29 03:09:09,664 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 03:09:09,808 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:09:09,810 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:09:10,484 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:09:10,925 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:09:10,926 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-29 03:09:10,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:09:10 BoogieIcfgContainer [2023-11-29 03:09:10,926 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:09:10,929 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:09:10,930 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:09:10,933 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:09:10,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:09:09" (1/3) ... [2023-11-29 03:09:10,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc62286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:09:10, skipping insertion in model container [2023-11-29 03:09:10,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:09:09" (2/3) ... [2023-11-29 03:09:10,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc62286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:09:10, skipping insertion in model container [2023-11-29 03:09:10,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:09:10" (3/3) ... [2023-11-29 03:09:10,936 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2023-11-29 03:09:10,956 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:09:10,956 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-11-29 03:09:10,956 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 03:09:11,054 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 03:09:11,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 84 transitions, 189 flow [2023-11-29 03:09:11,132 INFO L124 PetriNetUnfolderBase]: 7/81 cut-off events. [2023-11-29 03:09:11,132 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 03:09:11,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 81 events. 7/81 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 176 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2023-11-29 03:09:11,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 84 transitions, 189 flow [2023-11-29 03:09:11,141 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 80 transitions, 178 flow [2023-11-29 03:09:11,151 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:09:11,158 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;@7b59074e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:09:11,158 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-11-29 03:09:11,162 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 03:09:11,162 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-29 03:09:11,162 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 03:09:11,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:09:11,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 03:09:11,163 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:09:11,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:09:11,169 INFO L85 PathProgramCache]: Analyzing trace with hash 640098, now seen corresponding path program 1 times [2023-11-29 03:09:11,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:09:11,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359989809] [2023-11-29 03:09:11,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:09:11,183 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:09:11,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:09:11,219 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:09:11,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-29 03:09:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:09:11,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 03:09:11,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:09:11,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 03:09:11,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 03:09:11,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:09:11,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 03:09:11,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:09:11,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 03:09:11,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:09:11,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 03:09:11,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:09:11,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 03:09:11,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 03:09:11,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:09:11,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:09:11,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 03:09:11,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:09:11,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 03:09:11,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:09:11,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 03:09:11,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:09:11,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 03:09:11,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 03:09:11,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 03:09:11,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:09:11,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:11,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 03:09:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:09:11,689 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:09:11,690 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:09:11,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359989809] [2023-11-29 03:09:11,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359989809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:09:11,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:09:11,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 03:09:11,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786105228] [2023-11-29 03:09:11,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:09:11,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:09:11,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:09:11,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:09:11,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:09:11,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2023-11-29 03:09:11,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:11,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:09:11,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2023-11-29 03:09:11,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:09:12,536 INFO L124 PetriNetUnfolderBase]: 1589/2893 cut-off events. [2023-11-29 03:09:12,537 INFO L125 PetriNetUnfolderBase]: For 248/250 co-relation queries the response was YES. [2023-11-29 03:09:12,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5196 conditions, 2893 events. 1589/2893 cut-off events. For 248/250 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 19715 event pairs, 1200 based on Foata normal form. 1/2040 useless extension candidates. Maximal degree in co-relation 4606. Up to 2133 conditions per place. [2023-11-29 03:09:12,577 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 38 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-11-29 03:09:12,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 75 transitions, 248 flow [2023-11-29 03:09:12,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:09:12,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:09:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-11-29 03:09:12,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2023-11-29 03:09:12,593 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-11-29 03:09:12,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-11-29 03:09:12,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:09:12,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-11-29 03:09:12,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:12,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:12,605 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:12,607 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 178 flow. Second operand 3 states and 161 transitions. [2023-11-29 03:09:12,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 75 transitions, 248 flow [2023-11-29 03:09:12,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 75 transitions, 236 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 03:09:12,620 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 160 flow [2023-11-29 03:09:12,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2023-11-29 03:09:12,626 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, -9 predicate places. [2023-11-29 03:09:12,626 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 160 flow [2023-11-29 03:09:12,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:12,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:09:12,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 03:09:12,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-29 03:09:12,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:09:12,828 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:09:12,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:09:12,829 INFO L85 PathProgramCache]: Analyzing trace with hash 640099, now seen corresponding path program 1 times [2023-11-29 03:09:12,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:09:12,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784129841] [2023-11-29 03:09:12,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:09:12,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:09:12,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:09:12,832 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:09:12,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-29 03:09:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:09:12,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:09:12,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:09:12,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 03:09:12,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:12,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:12,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:12,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:09:12,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:12,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:13,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:13,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:09:13,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:13,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:13,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:13,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:09:13,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:13,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:13,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:13,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:09:13,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:13,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:13,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:13,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:09:13,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:13,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:13,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:13,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:09:13,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:13,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:13,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:13,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:09:13,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:13,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:13,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:13,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:09:13,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:13,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:13,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:13,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:09:13,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:13,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:13,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:13,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:09:13,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:13,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 03:09:13,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:13,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:09:13,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:13,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:09:13,406 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:09:13,406 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:09:13,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784129841] [2023-11-29 03:09:13,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784129841] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:09:13,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:09:13,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:09:13,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898801829] [2023-11-29 03:09:13,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:09:13,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:09:13,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:09:13,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:09:13,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:09:13,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2023-11-29 03:09:13,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 160 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:13,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:09:13,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2023-11-29 03:09:13,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:09:14,451 INFO L124 PetriNetUnfolderBase]: 1592/2902 cut-off events. [2023-11-29 03:09:14,452 INFO L125 PetriNetUnfolderBase]: For 67/69 co-relation queries the response was YES. [2023-11-29 03:09:14,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5106 conditions, 2902 events. 1592/2902 cut-off events. For 67/69 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 19693 event pairs, 1200 based on Foata normal form. 0/2044 useless extension candidates. Maximal degree in co-relation 5056. Up to 2146 conditions per place. [2023-11-29 03:09:14,507 INFO L140 encePairwiseOnDemand]: 71/84 looper letters, 42 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2023-11-29 03:09:14,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 84 transitions, 284 flow [2023-11-29 03:09:14,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:09:14,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 03:09:14,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 211 transitions. [2023-11-29 03:09:14,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6279761904761905 [2023-11-29 03:09:14,510 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 211 transitions. [2023-11-29 03:09:14,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 211 transitions. [2023-11-29 03:09:14,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:09:14,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 211 transitions. [2023-11-29 03:09:14,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:14,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:14,515 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:14,515 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 160 flow. Second operand 4 states and 211 transitions. [2023-11-29 03:09:14,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 84 transitions, 284 flow [2023-11-29 03:09:14,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:09:14,519 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 238 flow [2023-11-29 03:09:14,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2023-11-29 03:09:14,520 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, -5 predicate places. [2023-11-29 03:09:14,521 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 238 flow [2023-11-29 03:09:14,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:14,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:09:14,521 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-29 03:09:14,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-29 03:09:14,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:09:14,724 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:09:14,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:09:14,724 INFO L85 PathProgramCache]: Analyzing trace with hash 615155393, now seen corresponding path program 1 times [2023-11-29 03:09:14,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:09:14,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312803318] [2023-11-29 03:09:14,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:09:14,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:09:14,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:09:14,726 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:09:14,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-29 03:09:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:09:14,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:09:14,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:09:14,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-29 03:09:14,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:14,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:09:14,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:14,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:09:14,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:14,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:14,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:14,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:14,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:14,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:09:14,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:14,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:14,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:14,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:09:14,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:14,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:14,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:14,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:09:14,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:14,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:09:15,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:15,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:15,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:15,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:09:15,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:15,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:15,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:15,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:09:15,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:15,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:15,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:15,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:09:15,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:15,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:15,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:15,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:15,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:15,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:09:15,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:15,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:09:15,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:15,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:15,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:15,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:09:15,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:15,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:09:15,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:09:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:09:15,732 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:09:15,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312803318] [2023-11-29 03:09:15,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312803318] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:09:15,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:09:15,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 03:09:15,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217875982] [2023-11-29 03:09:15,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:09:15,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 03:09:15,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:09:15,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 03:09:15,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-29 03:09:17,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2023-11-29 03:09:17,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 238 flow. Second operand has 10 states, 10 states have (on average 40.0) internal successors, (400), 10 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:17,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:09:17,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2023-11-29 03:09:17,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:09:20,384 INFO L124 PetriNetUnfolderBase]: 1601/2929 cut-off events. [2023-11-29 03:09:20,384 INFO L125 PetriNetUnfolderBase]: For 75/77 co-relation queries the response was YES. [2023-11-29 03:09:20,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5224 conditions, 2929 events. 1601/2929 cut-off events. For 75/77 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 19852 event pairs, 1200 based on Foata normal form. 0/2071 useless extension candidates. Maximal degree in co-relation 5070. Up to 2149 conditions per place. [2023-11-29 03:09:20,411 INFO L140 encePairwiseOnDemand]: 71/84 looper letters, 42 selfloop transitions, 37 changer transitions 0/111 dead transitions. [2023-11-29 03:09:20,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 111 transitions, 516 flow [2023-11-29 03:09:20,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 03:09:20,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 03:09:20,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 478 transitions. [2023-11-29 03:09:20,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2023-11-29 03:09:20,418 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 478 transitions. [2023-11-29 03:09:20,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 478 transitions. [2023-11-29 03:09:20,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:09:20,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 478 transitions. [2023-11-29 03:09:20,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 47.8) internal successors, (478), 10 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:20,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 84.0) internal successors, (924), 11 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:20,425 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 84.0) internal successors, (924), 11 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:20,425 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 238 flow. Second operand 10 states and 478 transitions. [2023-11-29 03:09:20,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 111 transitions, 516 flow [2023-11-29 03:09:20,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 111 transitions, 516 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 03:09:20,430 INFO L231 Difference]: Finished difference. Result has 90 places, 111 transitions, 482 flow [2023-11-29 03:09:20,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=482, PETRI_PLACES=90, PETRI_TRANSITIONS=111} [2023-11-29 03:09:20,431 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 7 predicate places. [2023-11-29 03:09:20,431 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 111 transitions, 482 flow [2023-11-29 03:09:20,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 40.0) internal successors, (400), 10 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:20,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:09:20,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 03:09:20,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-29 03:09:20,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:09:20,633 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:09:20,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:09:20,633 INFO L85 PathProgramCache]: Analyzing trace with hash 615196399, now seen corresponding path program 1 times [2023-11-29 03:09:20,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:09:20,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438813606] [2023-11-29 03:09:20,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:09:20,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:09:20,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:09:20,635 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:09:20,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-29 03:09:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:09:20,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 03:09:20,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:09:20,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:20,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:20,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:20,808 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 03:09:20,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 18 [2023-11-29 03:09:20,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:20,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:20,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:20,876 INFO L349 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-11-29 03:09:20,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 1 [2023-11-29 03:09:20,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:20,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:20,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:20,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:20,921 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 03:09:20,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-29 03:09:20,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:20,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:20,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:20,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-29 03:09:20,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:20,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:20,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:20,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-29 03:09:20,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:20,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:21,006 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 03:09:21,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 03:09:21,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:21,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 03:09:21,086 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 03:09:21,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 03:09:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:09:21,124 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:09:21,124 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:09:21,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438813606] [2023-11-29 03:09:21,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438813606] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:09:21,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:09:21,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:09:21,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249972767] [2023-11-29 03:09:21,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:09:21,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:09:21,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:09:21,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:09:21,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:09:21,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 84 [2023-11-29 03:09:21,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 111 transitions, 482 flow. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:21,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:09:21,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 84 [2023-11-29 03:09:21,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:09:21,837 INFO L124 PetriNetUnfolderBase]: 1601/2888 cut-off events. [2023-11-29 03:09:21,837 INFO L125 PetriNetUnfolderBase]: For 107/109 co-relation queries the response was YES. [2023-11-29 03:09:21,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5246 conditions, 2888 events. 1601/2888 cut-off events. For 107/109 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 19192 event pairs, 1200 based on Foata normal form. 241/2318 useless extension candidates. Maximal degree in co-relation 5157. Up to 2177 conditions per place. [2023-11-29 03:09:21,881 INFO L140 encePairwiseOnDemand]: 81/84 looper letters, 75 selfloop transitions, 1 changer transitions 0/109 dead transitions. [2023-11-29 03:09:21,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 109 transitions, 630 flow [2023-11-29 03:09:21,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:09:21,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:09:21,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-11-29 03:09:21,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2023-11-29 03:09:21,884 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-11-29 03:09:21,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-11-29 03:09:21,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:09:21,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-11-29 03:09:21,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:21,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:21,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:21,886 INFO L175 Difference]: Start difference. First operand has 90 places, 111 transitions, 482 flow. Second operand 3 states and 162 transitions. [2023-11-29 03:09:21,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 109 transitions, 630 flow [2023-11-29 03:09:21,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 109 transitions, 535 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-11-29 03:09:21,893 INFO L231 Difference]: Finished difference. Result has 86 places, 109 transitions, 385 flow [2023-11-29 03:09:21,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=385, PETRI_PLACES=86, PETRI_TRANSITIONS=109} [2023-11-29 03:09:21,894 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 3 predicate places. [2023-11-29 03:09:21,894 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 109 transitions, 385 flow [2023-11-29 03:09:21,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:21,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:09:21,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 03:09:21,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-29 03:09:22,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:09:22,097 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:09:22,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:09:22,098 INFO L85 PathProgramCache]: Analyzing trace with hash 615196400, now seen corresponding path program 1 times [2023-11-29 03:09:22,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:09:22,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201103213] [2023-11-29 03:09:22,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:09:22,098 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:09:22,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:09:22,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:09:22,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-29 03:09:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:09:22,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 03:09:22,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:09:22,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:22,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:22,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 03:09:22,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:22,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:22,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 03:09:22,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:22,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:22,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:09:22,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:22,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:22,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:22,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:22,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 03:09:22,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:22,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:22,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:22,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 03:09:22,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:22,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:22,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:09:22,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:22,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:22,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:22,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 03:09:22,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:22,441 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 [2023-11-29 03:09:22,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:22,466 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 [2023-11-29 03:09:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:09:22,510 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:09:22,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:09:22,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201103213] [2023-11-29 03:09:22,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201103213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:09:22,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:09:22,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:09:22,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252076560] [2023-11-29 03:09:22,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:09:22,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:09:22,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:09:22,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:09:22,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:09:22,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 84 [2023-11-29 03:09:22,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 109 transitions, 385 flow. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:22,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:09:22,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 84 [2023-11-29 03:09:22,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:09:23,150 INFO L124 PetriNetUnfolderBase]: 1601/2847 cut-off events. [2023-11-29 03:09:23,151 INFO L125 PetriNetUnfolderBase]: For 87/89 co-relation queries the response was YES. [2023-11-29 03:09:23,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5160 conditions, 2847 events. 1601/2847 cut-off events. For 87/89 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 18592 event pairs, 1200 based on Foata normal form. 241/2316 useless extension candidates. Maximal degree in co-relation 5147. Up to 2177 conditions per place. [2023-11-29 03:09:23,167 INFO L140 encePairwiseOnDemand]: 81/84 looper letters, 75 selfloop transitions, 1 changer transitions 0/107 dead transitions. [2023-11-29 03:09:23,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 107 transitions, 533 flow [2023-11-29 03:09:23,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:09:23,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:09:23,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-11-29 03:09:23,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2023-11-29 03:09:23,169 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-11-29 03:09:23,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-11-29 03:09:23,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:09:23,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-11-29 03:09:23,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:23,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:23,171 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:23,171 INFO L175 Difference]: Start difference. First operand has 86 places, 109 transitions, 385 flow. Second operand 3 states and 162 transitions. [2023-11-29 03:09:23,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 107 transitions, 533 flow [2023-11-29 03:09:23,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 107 transitions, 532 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:09:23,175 INFO L231 Difference]: Finished difference. Result has 85 places, 107 transitions, 382 flow [2023-11-29 03:09:23,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=382, PETRI_PLACES=85, PETRI_TRANSITIONS=107} [2023-11-29 03:09:23,176 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 2 predicate places. [2023-11-29 03:09:23,176 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 107 transitions, 382 flow [2023-11-29 03:09:23,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:23,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:09:23,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:09:23,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-29 03:09:23,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:09:23,377 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:09:23,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:09:23,377 INFO L85 PathProgramCache]: Analyzing trace with hash 691128551, now seen corresponding path program 1 times [2023-11-29 03:09:23,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:09:23,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761036532] [2023-11-29 03:09:23,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:09:23,378 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:09:23,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:09:23,379 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:09:23,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-29 03:09:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:09:23,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 03:09:23,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:09:23,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:23,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:23,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 03:09:23,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-29 03:09:23,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:23,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:23,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:09:23,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:23,564 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 03:09:23,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:23,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:23,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:09:23,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:23,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:23,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 03:09:23,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:23,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:23,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:23,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 03:09:23,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:23,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:23,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:09:23,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:23,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:23,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:23,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 03:09:23,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:23,718 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 [2023-11-29 03:09:23,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:23,746 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 [2023-11-29 03:09:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:09:23,826 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:09:23,827 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:09:23,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761036532] [2023-11-29 03:09:23,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761036532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:09:23,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:09:23,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:09:23,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495785079] [2023-11-29 03:09:23,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:09:23,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:09:23,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:09:23,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:09:23,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:09:24,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 84 [2023-11-29 03:09:24,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 107 transitions, 382 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:24,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:09:24,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 84 [2023-11-29 03:09:24,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:09:24,469 INFO L124 PetriNetUnfolderBase]: 1601/2834 cut-off events. [2023-11-29 03:09:24,470 INFO L125 PetriNetUnfolderBase]: For 87/89 co-relation queries the response was YES. [2023-11-29 03:09:24,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5148 conditions, 2834 events. 1601/2834 cut-off events. For 87/89 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 18402 event pairs, 1200 based on Foata normal form. 54/2129 useless extension candidates. Maximal degree in co-relation 5134. Up to 2177 conditions per place. [2023-11-29 03:09:24,483 INFO L140 encePairwiseOnDemand]: 81/84 looper letters, 75 selfloop transitions, 1 changer transitions 0/105 dead transitions. [2023-11-29 03:09:24,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 105 transitions, 530 flow [2023-11-29 03:09:24,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:09:24,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:09:24,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-11-29 03:09:24,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2023-11-29 03:09:24,485 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-11-29 03:09:24,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-11-29 03:09:24,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:09:24,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-11-29 03:09:24,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:24,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:24,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:24,487 INFO L175 Difference]: Start difference. First operand has 85 places, 107 transitions, 382 flow. Second operand 3 states and 162 transitions. [2023-11-29 03:09:24,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 105 transitions, 530 flow [2023-11-29 03:09:24,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 105 transitions, 529 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:09:24,490 INFO L231 Difference]: Finished difference. Result has 84 places, 105 transitions, 379 flow [2023-11-29 03:09:24,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=379, PETRI_PLACES=84, PETRI_TRANSITIONS=105} [2023-11-29 03:09:24,491 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 1 predicate places. [2023-11-29 03:09:24,491 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 105 transitions, 379 flow [2023-11-29 03:09:24,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:24,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:09:24,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:09:24,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-29 03:09:24,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:09:24,693 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:09:24,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:09:24,693 INFO L85 PathProgramCache]: Analyzing trace with hash 691128550, now seen corresponding path program 1 times [2023-11-29 03:09:24,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:09:24,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [984808961] [2023-11-29 03:09:24,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:09:24,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:09:24,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:09:24,694 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:09:24,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-29 03:09:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:09:24,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:09:24,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:09:24,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:24,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:24,844 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 03:09:24,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 03:09:24,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:24,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:24,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:24,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:24,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-11-29 03:09:24,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:24,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:24,917 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 03:09:24,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-29 03:09:24,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:24,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:24,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:24,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:09:24,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:24,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:24,976 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 03:09:24,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 03:09:24,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:24,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:24,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:24,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-29 03:09:25,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:25,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:25,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:25,040 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 03:09:25,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 03:09:25,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:25,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:25,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:25,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 03:09:25,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:25,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 03:09:25,136 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 03:09:25,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 03:09:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:09:25,205 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:09:25,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:09:25,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [984808961] [2023-11-29 03:09:25,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [984808961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:09:25,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:09:25,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:09:25,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852175675] [2023-11-29 03:09:25,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:09:25,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:09:25,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:09:25,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:09:25,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:09:25,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 84 [2023-11-29 03:09:25,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 105 transitions, 379 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:25,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:09:25,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 84 [2023-11-29 03:09:25,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:09:25,815 INFO L124 PetriNetUnfolderBase]: 1601/2821 cut-off events. [2023-11-29 03:09:25,815 INFO L125 PetriNetUnfolderBase]: For 87/89 co-relation queries the response was YES. [2023-11-29 03:09:25,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5136 conditions, 2821 events. 1601/2821 cut-off events. For 87/89 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 18265 event pairs, 1200 based on Foata normal form. 54/2129 useless extension candidates. Maximal degree in co-relation 5121. Up to 2177 conditions per place. [2023-11-29 03:09:25,830 INFO L140 encePairwiseOnDemand]: 81/84 looper letters, 75 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2023-11-29 03:09:25,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 103 transitions, 527 flow [2023-11-29 03:09:25,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:09:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:09:25,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-11-29 03:09:25,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2023-11-29 03:09:25,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-11-29 03:09:25,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-11-29 03:09:25,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:09:25,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-11-29 03:09:25,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:25,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:25,835 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:25,835 INFO L175 Difference]: Start difference. First operand has 84 places, 105 transitions, 379 flow. Second operand 3 states and 162 transitions. [2023-11-29 03:09:25,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 103 transitions, 527 flow [2023-11-29 03:09:25,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 103 transitions, 526 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:09:25,838 INFO L231 Difference]: Finished difference. Result has 83 places, 103 transitions, 376 flow [2023-11-29 03:09:25,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=376, PETRI_PLACES=83, PETRI_TRANSITIONS=103} [2023-11-29 03:09:25,839 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 0 predicate places. [2023-11-29 03:09:25,839 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 103 transitions, 376 flow [2023-11-29 03:09:25,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:25,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:09:25,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:09:25,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-11-29 03:09:26,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:09:26,040 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:09:26,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:09:26,041 INFO L85 PathProgramCache]: Analyzing trace with hash -49778192, now seen corresponding path program 1 times [2023-11-29 03:09:26,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:09:26,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775372500] [2023-11-29 03:09:26,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:09:26,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:09:26,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:09:26,043 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:09:26,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-29 03:09:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:09:26,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:09:26,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:09:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:09:26,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:09:26,224 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:09:26,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775372500] [2023-11-29 03:09:26,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775372500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:09:26,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:09:26,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:09:26,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293264741] [2023-11-29 03:09:26,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:09:26,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:09:26,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:09:26,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:09:26,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:09:26,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 84 [2023-11-29 03:09:26,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 103 transitions, 376 flow. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:26,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:09:26,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 84 [2023-11-29 03:09:26,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:09:27,260 INFO L124 PetriNetUnfolderBase]: 3044/5453 cut-off events. [2023-11-29 03:09:27,260 INFO L125 PetriNetUnfolderBase]: For 154/158 co-relation queries the response was YES. [2023-11-29 03:09:27,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9807 conditions, 5453 events. 3044/5453 cut-off events. For 154/158 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 38343 event pairs, 2119 based on Foata normal form. 2/3848 useless extension candidates. Maximal degree in co-relation 9791. Up to 2647 conditions per place. [2023-11-29 03:09:27,285 INFO L140 encePairwiseOnDemand]: 72/84 looper letters, 110 selfloop transitions, 18 changer transitions 0/154 dead transitions. [2023-11-29 03:09:27,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 154 transitions, 747 flow [2023-11-29 03:09:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:09:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 03:09:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 350 transitions. [2023-11-29 03:09:27,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2023-11-29 03:09:27,287 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 350 transitions. [2023-11-29 03:09:27,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 350 transitions. [2023-11-29 03:09:27,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:09:27,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 350 transitions. [2023-11-29 03:09:27,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 58.333333333333336) internal successors, (350), 6 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:27,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:27,291 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:27,291 INFO L175 Difference]: Start difference. First operand has 83 places, 103 transitions, 376 flow. Second operand 6 states and 350 transitions. [2023-11-29 03:09:27,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 154 transitions, 747 flow [2023-11-29 03:09:27,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 154 transitions, 746 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:09:27,296 INFO L231 Difference]: Finished difference. Result has 91 places, 107 transitions, 460 flow [2023-11-29 03:09:27,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=460, PETRI_PLACES=91, PETRI_TRANSITIONS=107} [2023-11-29 03:09:27,297 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 8 predicate places. [2023-11-29 03:09:27,297 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 107 transitions, 460 flow [2023-11-29 03:09:27,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:27,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:09:27,298 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-29 03:09:27,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-29 03:09:27,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:09:27,499 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:09:27,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:09:27,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1037144283, now seen corresponding path program 2 times [2023-11-29 03:09:27,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:09:27,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535697184] [2023-11-29 03:09:27,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:09:27,501 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:09:27,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:09:27,502 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:09:27,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-29 03:09:27,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:09:27,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:09:27,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 03:09:27,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:09:27,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 03:09:27,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:09:27,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:27,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:09:27,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:27,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:09:27,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:09:27,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:27,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:09:27,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:27,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:27,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:09:27,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:27,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:09:27,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:09:27,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:27,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:09:27,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:27,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:27,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:09:27,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 03:09:27,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:09:27,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:09:27,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:09:27,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:09:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:09:28,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:09:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:09:28,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:09:28,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535697184] [2023-11-29 03:09:28,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535697184] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:09:28,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:09:28,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 03:09:28,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739356100] [2023-11-29 03:09:28,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:09:28,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 03:09:28,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:09:28,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 03:09:28,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:09:31,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2023-11-29 03:09:31,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 107 transitions, 460 flow. Second operand has 14 states, 14 states have (on average 40.57142857142857) internal successors, (568), 14 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:09:31,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:09:31,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2023-11-29 03:09:31,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:09:37,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:09:40,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:09:43,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:09:47,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:09:49,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:09:51,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:09:54,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:09:56,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:09:57,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:10:00,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:10:01,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:10:04,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:10:06,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:10:10,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:10:13,178 INFO L124 PetriNetUnfolderBase]: 2720/4984 cut-off events. [2023-11-29 03:10:13,179 INFO L125 PetriNetUnfolderBase]: For 1349/1461 co-relation queries the response was YES. [2023-11-29 03:10:13,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9961 conditions, 4984 events. 2720/4984 cut-off events. For 1349/1461 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 35532 event pairs, 2140 based on Foata normal form. 18/3640 useless extension candidates. Maximal degree in co-relation 9940. Up to 3712 conditions per place. [2023-11-29 03:10:13,204 INFO L140 encePairwiseOnDemand]: 71/84 looper letters, 45 selfloop transitions, 92 changer transitions 0/161 dead transitions. [2023-11-29 03:10:13,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 161 transitions, 1034 flow [2023-11-29 03:10:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 03:10:13,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 03:10:13,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1009 transitions. [2023-11-29 03:10:13,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545995670995671 [2023-11-29 03:10:13,209 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1009 transitions. [2023-11-29 03:10:13,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1009 transitions. [2023-11-29 03:10:13,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:10:13,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1009 transitions. [2023-11-29 03:10:13,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 45.86363636363637) internal successors, (1009), 22 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:13,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:13,217 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:13,217 INFO L175 Difference]: Start difference. First operand has 91 places, 107 transitions, 460 flow. Second operand 22 states and 1009 transitions. [2023-11-29 03:10:13,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 161 transitions, 1034 flow [2023-11-29 03:10:13,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 161 transitions, 1030 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-29 03:10:13,223 INFO L231 Difference]: Finished difference. Result has 118 places, 161 transitions, 1026 flow [2023-11-29 03:10:13,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1026, PETRI_PLACES=118, PETRI_TRANSITIONS=161} [2023-11-29 03:10:13,224 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 35 predicate places. [2023-11-29 03:10:13,224 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 161 transitions, 1026 flow [2023-11-29 03:10:13,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 40.57142857142857) internal successors, (568), 14 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:13,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:10:13,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:10:13,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-11-29 03:10:13,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:10:13,426 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:10:13,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:10:13,426 INFO L85 PathProgramCache]: Analyzing trace with hash -661920681, now seen corresponding path program 1 times [2023-11-29 03:10:13,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:10:13,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2131312251] [2023-11-29 03:10:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:10:13,427 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:10:13,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:10:13,427 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:10:13,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-29 03:10:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:10:13,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 03:10:13,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:10:13,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:13,569 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 03:10:13,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2023-11-29 03:10:13,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:13,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:13,594 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 03:10:13,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 03:10:13,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:13,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:13,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:13,630 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 03:10:13,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-29 03:10:13,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:13,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:13,651 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 03:10:13,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-29 03:10:13,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:13,659 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 03:10:13,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 03:10:13,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:13,668 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 03:10:13,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 03:10:13,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:13,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:13,690 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 03:10:13,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 03:10:13,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:13,699 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 03:10:13,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 03:10:13,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:13,709 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 03:10:13,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 03:10:13,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:13,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:13,736 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 03:10:13,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 03:10:13,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:13,747 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 03:10:13,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 03:10:13,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:13,758 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 03:10:13,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 03:10:13,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:13,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 03:10:13,839 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 03:10:13,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 03:10:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:10:13,914 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:10:13,914 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:10:13,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2131312251] [2023-11-29 03:10:13,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2131312251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:10:13,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:10:13,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:10:13,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939388244] [2023-11-29 03:10:13,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:10:13,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:10:13,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:10:13,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:10:13,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:10:14,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 84 [2023-11-29 03:10:14,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 161 transitions, 1026 flow. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:14,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:10:14,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 84 [2023-11-29 03:10:14,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:10:14,768 INFO L124 PetriNetUnfolderBase]: 2720/4941 cut-off events. [2023-11-29 03:10:14,768 INFO L125 PetriNetUnfolderBase]: For 1361/1473 co-relation queries the response was YES. [2023-11-29 03:10:14,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10055 conditions, 4941 events. 2720/4941 cut-off events. For 1361/1473 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34905 event pairs, 2140 based on Foata normal form. 81/3709 useless extension candidates. Maximal degree in co-relation 10026. Up to 3789 conditions per place. [2023-11-29 03:10:14,802 INFO L140 encePairwiseOnDemand]: 81/84 looper letters, 133 selfloop transitions, 1 changer transitions 0/159 dead transitions. [2023-11-29 03:10:14,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 159 transitions, 1290 flow [2023-11-29 03:10:14,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:10:14,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:10:14,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-11-29 03:10:14,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2023-11-29 03:10:14,804 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-11-29 03:10:14,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-11-29 03:10:14,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:10:14,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-11-29 03:10:14,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:14,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:14,806 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:14,806 INFO L175 Difference]: Start difference. First operand has 118 places, 161 transitions, 1026 flow. Second operand 3 states and 162 transitions. [2023-11-29 03:10:14,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 159 transitions, 1290 flow [2023-11-29 03:10:14,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 159 transitions, 1056 flow, removed 67 selfloop flow, removed 9 redundant places. [2023-11-29 03:10:14,817 INFO L231 Difference]: Finished difference. Result has 109 places, 159 transitions, 790 flow [2023-11-29 03:10:14,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=790, PETRI_PLACES=109, PETRI_TRANSITIONS=159} [2023-11-29 03:10:14,818 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 26 predicate places. [2023-11-29 03:10:14,818 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 159 transitions, 790 flow [2023-11-29 03:10:14,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:14,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:10:14,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:10:14,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-11-29 03:10:15,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:10:15,019 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:10:15,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:10:15,020 INFO L85 PathProgramCache]: Analyzing trace with hash -661920680, now seen corresponding path program 1 times [2023-11-29 03:10:15,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:10:15,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357808577] [2023-11-29 03:10:15,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:10:15,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:10:15,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:10:15,021 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:10:15,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-29 03:10:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:10:15,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 03:10:15,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:10:15,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:15,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 03:10:15,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:15,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:15,181 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 03:10:15,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:15,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:15,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 03:10:15,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:15,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:15,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:10:15,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:15,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:15,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:10:15,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:15,262 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 03:10:15,268 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 03:10:15,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:15,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:15,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:10:15,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:15,286 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 03:10:15,292 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 03:10:15,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:15,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:15,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:10:15,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:15,309 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 03:10:15,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:15,335 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 [2023-11-29 03:10:15,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:15,376 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 [2023-11-29 03:10:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:10:15,495 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:10:15,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:10:15,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357808577] [2023-11-29 03:10:15,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357808577] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:10:15,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:10:15,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:10:15,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327625948] [2023-11-29 03:10:15,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:10:15,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:10:15,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:10:15,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:10:15,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:10:15,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 84 [2023-11-29 03:10:15,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 159 transitions, 790 flow. Second operand has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:15,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:10:15,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 84 [2023-11-29 03:10:15,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:10:16,374 INFO L124 PetriNetUnfolderBase]: 2720/4898 cut-off events. [2023-11-29 03:10:16,374 INFO L125 PetriNetUnfolderBase]: For 1358/1470 co-relation queries the response was YES. [2023-11-29 03:10:16,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9896 conditions, 4898 events. 2720/4898 cut-off events. For 1358/1470 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34324 event pairs, 2140 based on Foata normal form. 81/3709 useless extension candidates. Maximal degree in co-relation 9867. Up to 3789 conditions per place. [2023-11-29 03:10:16,416 INFO L140 encePairwiseOnDemand]: 81/84 looper letters, 133 selfloop transitions, 1 changer transitions 0/157 dead transitions. [2023-11-29 03:10:16,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 157 transitions, 1054 flow [2023-11-29 03:10:16,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:10:16,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:10:16,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-11-29 03:10:16,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2023-11-29 03:10:16,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-11-29 03:10:16,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-11-29 03:10:16,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:10:16,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-11-29 03:10:16,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:16,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:16,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:16,421 INFO L175 Difference]: Start difference. First operand has 109 places, 159 transitions, 790 flow. Second operand 3 states and 162 transitions. [2023-11-29 03:10:16,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 157 transitions, 1054 flow [2023-11-29 03:10:16,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 157 transitions, 1053 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:10:16,431 INFO L231 Difference]: Finished difference. Result has 108 places, 157 transitions, 787 flow [2023-11-29 03:10:16,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=787, PETRI_PLACES=108, PETRI_TRANSITIONS=157} [2023-11-29 03:10:16,432 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 25 predicate places. [2023-11-29 03:10:16,432 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 157 transitions, 787 flow [2023-11-29 03:10:16,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:16,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:10:16,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:10:16,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-29 03:10:16,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:10:16,633 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:10:16,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:10:16,633 INFO L85 PathProgramCache]: Analyzing trace with hash 955331790, now seen corresponding path program 1 times [2023-11-29 03:10:16,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:10:16,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075877848] [2023-11-29 03:10:16,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:10:16,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:10:16,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:10:16,635 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:10:16,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-29 03:10:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:10:16,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:10:16,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:10:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:10:16,813 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:10:16,813 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:10:16,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075877848] [2023-11-29 03:10:16,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075877848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:10:16,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:10:16,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:10:16,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587639840] [2023-11-29 03:10:16,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:10:16,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:10:16,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:10:16,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:10:16,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:10:16,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 84 [2023-11-29 03:10:16,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 157 transitions, 787 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:16,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:10:16,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 84 [2023-11-29 03:10:16,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:10:17,575 INFO L124 PetriNetUnfolderBase]: 2068/3579 cut-off events. [2023-11-29 03:10:17,576 INFO L125 PetriNetUnfolderBase]: For 833/990 co-relation queries the response was YES. [2023-11-29 03:10:17,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7266 conditions, 3579 events. 2068/3579 cut-off events. For 833/990 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 21428 event pairs, 1473 based on Foata normal form. 0/2773 useless extension candidates. Maximal degree in co-relation 7236. Up to 2415 conditions per place. [2023-11-29 03:10:17,594 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 135 selfloop transitions, 30 changer transitions 0/187 dead transitions. [2023-11-29 03:10:17,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 187 transitions, 1193 flow [2023-11-29 03:10:17,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:10:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 03:10:17,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 331 transitions. [2023-11-29 03:10:17,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6567460317460317 [2023-11-29 03:10:17,596 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 331 transitions. [2023-11-29 03:10:17,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 331 transitions. [2023-11-29 03:10:17,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:10:17,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 331 transitions. [2023-11-29 03:10:17,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 55.166666666666664) internal successors, (331), 6 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:17,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:17,598 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:17,599 INFO L175 Difference]: Start difference. First operand has 108 places, 157 transitions, 787 flow. Second operand 6 states and 331 transitions. [2023-11-29 03:10:17,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 187 transitions, 1193 flow [2023-11-29 03:10:17,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 187 transitions, 1192 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:10:17,605 INFO L231 Difference]: Finished difference. Result has 114 places, 159 transitions, 862 flow [2023-11-29 03:10:17,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=862, PETRI_PLACES=114, PETRI_TRANSITIONS=159} [2023-11-29 03:10:17,606 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 31 predicate places. [2023-11-29 03:10:17,606 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 159 transitions, 862 flow [2023-11-29 03:10:17,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:17,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:10:17,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:10:17,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-11-29 03:10:17,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:10:17,807 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:10:17,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:10:17,808 INFO L85 PathProgramCache]: Analyzing trace with hash -151016714, now seen corresponding path program 1 times [2023-11-29 03:10:17,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:10:17,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198468209] [2023-11-29 03:10:17,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:10:17,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:10:17,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:10:17,809 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:10:17,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-29 03:10:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:10:17,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 03:10:17,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:10:17,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:10:18,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 03:10:18,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:10:18,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:10:18,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:10:18,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:10:18,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:10:18,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:10:18,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:10:18,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:10:18,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:10:18,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:10:18,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:10:18,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:10:18,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:10:18,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:10:18,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:10:18,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:10:18,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:10:18,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:10:18,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:10:18,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:10:18,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:10:18,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:10:18,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 03:10:18,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:10:18,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:10:18,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:10:18,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:10:18,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:10:18,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:18,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 03:10:18,526 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 03:10:18,527 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 [2023-11-29 03:10:18,603 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-29 03:10:18,603 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 16 treesize of output 18 [2023-11-29 03:10:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:10:18,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:10:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:10:19,558 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:10:19,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198468209] [2023-11-29 03:10:19,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198468209] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:10:19,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:10:19,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 03:10:19,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517545702] [2023-11-29 03:10:19,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:10:19,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 03:10:19,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:10:19,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 03:10:19,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:10:25,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:10:34,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 84 [2023-11-29 03:10:34,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 159 transitions, 862 flow. Second operand has 14 states, 14 states have (on average 35.857142857142854) internal successors, (502), 14 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:34,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:10:34,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 84 [2023-11-29 03:10:34,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:10:43,317 INFO L124 PetriNetUnfolderBase]: 9193/15304 cut-off events. [2023-11-29 03:10:43,317 INFO L125 PetriNetUnfolderBase]: For 2626/3390 co-relation queries the response was YES. [2023-11-29 03:10:43,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31203 conditions, 15304 events. 9193/15304 cut-off events. For 2626/3390 co-relation queries the response was YES. Maximal size of possible extension queue 1117. Compared 122903 event pairs, 3979 based on Foata normal form. 169/11010 useless extension candidates. Maximal degree in co-relation 31170. Up to 2805 conditions per place. [2023-11-29 03:10:43,436 INFO L140 encePairwiseOnDemand]: 69/84 looper letters, 221 selfloop transitions, 146 changer transitions 0/385 dead transitions. [2023-11-29 03:10:43,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 385 transitions, 2433 flow [2023-11-29 03:10:43,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 03:10:43,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 03:10:43,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 922 transitions. [2023-11-29 03:10:43,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5776942355889725 [2023-11-29 03:10:43,440 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 922 transitions. [2023-11-29 03:10:43,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 922 transitions. [2023-11-29 03:10:43,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:10:43,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 922 transitions. [2023-11-29 03:10:43,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 48.526315789473685) internal successors, (922), 19 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:43,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:43,445 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:43,445 INFO L175 Difference]: Start difference. First operand has 114 places, 159 transitions, 862 flow. Second operand 19 states and 922 transitions. [2023-11-29 03:10:43,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 385 transitions, 2433 flow [2023-11-29 03:10:43,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 385 transitions, 2349 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 03:10:43,462 INFO L231 Difference]: Finished difference. Result has 135 places, 224 transitions, 1524 flow [2023-11-29 03:10:43,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1524, PETRI_PLACES=135, PETRI_TRANSITIONS=224} [2023-11-29 03:10:43,462 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 52 predicate places. [2023-11-29 03:10:43,462 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 224 transitions, 1524 flow [2023-11-29 03:10:43,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 35.857142857142854) internal successors, (502), 14 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:43,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:10:43,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:10:43,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-11-29 03:10:43,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:10:43,663 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:10:43,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:10:43,664 INFO L85 PathProgramCache]: Analyzing trace with hash -151016715, now seen corresponding path program 1 times [2023-11-29 03:10:43,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:10:43,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022455863] [2023-11-29 03:10:43,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:10:43,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:10:43,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:10:43,666 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:10:43,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-29 03:10:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:10:43,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:10:43,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:10:43,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 03:10:43,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 03:10:43,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 03:10:43,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:10:43,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:10:43,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 03:10:43,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 03:10:43,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:10:43,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:10:43,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 03:10:43,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:10:43,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 03:10:43,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:10:43,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 03:10:43,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:10:43,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 03:10:43,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:10:43,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 03:10:43,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:10:43,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 03:10:43,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 03:10:43,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 03:10:43,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:43,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 03:10:44,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:44,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 03:10:44,046 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-29 03:10:44,046 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 [2023-11-29 03:10:44,068 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 03:10:44,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 03:10:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 03:10:44,091 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:10:44,091 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:10:44,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022455863] [2023-11-29 03:10:44,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022455863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:10:44,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:10:44,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:10:44,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432071928] [2023-11-29 03:10:44,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:10:44,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:10:44,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:10:44,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:10:44,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:10:44,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 84 [2023-11-29 03:10:44,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 224 transitions, 1524 flow. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:44,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:10:44,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 84 [2023-11-29 03:10:44,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:10:45,969 INFO L124 PetriNetUnfolderBase]: 6106/10786 cut-off events. [2023-11-29 03:10:45,969 INFO L125 PetriNetUnfolderBase]: For 6666/6991 co-relation queries the response was YES. [2023-11-29 03:10:46,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26408 conditions, 10786 events. 6106/10786 cut-off events. For 6666/6991 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 87108 event pairs, 4914 based on Foata normal form. 726/9167 useless extension candidates. Maximal degree in co-relation 26369. Up to 8368 conditions per place. [2023-11-29 03:10:46,034 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 172 selfloop transitions, 28 changer transitions 0/222 dead transitions. [2023-11-29 03:10:46,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 222 transitions, 1920 flow [2023-11-29 03:10:46,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:10:46,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 03:10:46,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2023-11-29 03:10:46,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-11-29 03:10:46,036 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 231 transitions. [2023-11-29 03:10:46,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 231 transitions. [2023-11-29 03:10:46,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:10:46,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 231 transitions. [2023-11-29 03:10:46,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:46,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:46,038 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:46,038 INFO L175 Difference]: Start difference. First operand has 135 places, 224 transitions, 1524 flow. Second operand 5 states and 231 transitions. [2023-11-29 03:10:46,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 222 transitions, 1920 flow [2023-11-29 03:10:46,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 222 transitions, 1912 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-29 03:10:46,072 INFO L231 Difference]: Finished difference. Result has 137 places, 222 transitions, 1568 flow [2023-11-29 03:10:46,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1512, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1568, PETRI_PLACES=137, PETRI_TRANSITIONS=222} [2023-11-29 03:10:46,073 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 54 predicate places. [2023-11-29 03:10:46,073 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 222 transitions, 1568 flow [2023-11-29 03:10:46,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:10:46,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:10:46,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:10:46,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-11-29 03:10:46,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:10:46,274 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:10:46,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:10:46,274 INFO L85 PathProgramCache]: Analyzing trace with hash -386550136, now seen corresponding path program 1 times [2023-11-29 03:10:46,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:10:46,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437225377] [2023-11-29 03:10:46,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:10:46,275 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:10:46,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:10:46,275 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:10:46,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-29 03:10:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:10:46,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 03:10:46,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:10:46,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 03:10:46,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:10:46,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:10:46,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 03:10:46,607 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 03:10:46,608 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 [2023-11-29 03:10:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:10:46,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:10:47,131 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 03:10:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:10:47,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:10:47,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437225377] [2023-11-29 03:10:47,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437225377] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:10:47,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:10:47,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 03:10:47,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91013803] [2023-11-29 03:10:47,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:10:47,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 03:10:47,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:10:47,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 03:10:47,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:10:52,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:10:57,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:11:01,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:11:05,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:11:10,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:11:14,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:11:14,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 84 [2023-11-29 03:11:14,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 222 transitions, 1568 flow. Second operand has 14 states, 14 states have (on average 34.0) internal successors, (476), 14 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:11:14,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:11:14,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 84 [2023-11-29 03:11:14,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:11:19,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:11:31,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:11:35,603 INFO L124 PetriNetUnfolderBase]: 13601/23469 cut-off events. [2023-11-29 03:11:35,603 INFO L125 PetriNetUnfolderBase]: For 12809/15373 co-relation queries the response was YES. [2023-11-29 03:11:35,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54448 conditions, 23469 events. 13601/23469 cut-off events. For 12809/15373 co-relation queries the response was YES. Maximal size of possible extension queue 938. Compared 194315 event pairs, 6545 based on Foata normal form. 737/19365 useless extension candidates. Maximal degree in co-relation 54407. Up to 5429 conditions per place. [2023-11-29 03:11:35,775 INFO L140 encePairwiseOnDemand]: 70/84 looper letters, 204 selfloop transitions, 166 changer transitions 1/391 dead transitions. [2023-11-29 03:11:35,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 391 transitions, 2853 flow [2023-11-29 03:11:35,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 03:11:35,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 03:11:35,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1143 transitions. [2023-11-29 03:11:35,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48596938775510207 [2023-11-29 03:11:35,780 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1143 transitions. [2023-11-29 03:11:35,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1143 transitions. [2023-11-29 03:11:35,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:11:35,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1143 transitions. [2023-11-29 03:11:35,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 40.82142857142857) internal successors, (1143), 28 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:11:35,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 84.0) internal successors, (2436), 29 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:11:35,786 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 84.0) internal successors, (2436), 29 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:11:35,786 INFO L175 Difference]: Start difference. First operand has 137 places, 222 transitions, 1568 flow. Second operand 28 states and 1143 transitions. [2023-11-29 03:11:35,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 391 transitions, 2853 flow [2023-11-29 03:11:35,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 391 transitions, 2811 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 03:11:35,824 INFO L231 Difference]: Finished difference. Result has 166 places, 240 transitions, 2064 flow [2023-11-29 03:11:35,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2064, PETRI_PLACES=166, PETRI_TRANSITIONS=240} [2023-11-29 03:11:35,824 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 83 predicate places. [2023-11-29 03:11:35,824 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 240 transitions, 2064 flow [2023-11-29 03:11:35,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.0) internal successors, (476), 14 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:11:35,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:11:35,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:11:35,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-11-29 03:11:36,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:11:36,026 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:11:36,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:11:36,026 INFO L85 PathProgramCache]: Analyzing trace with hash -386550137, now seen corresponding path program 1 times [2023-11-29 03:11:36,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:11:36,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077593261] [2023-11-29 03:11:36,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:11:36,026 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:11:36,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:11:36,027 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:11:36,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-29 03:11:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:11:36,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 03:11:36,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:11:36,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:11:36,229 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-29 03:11:36,229 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 [2023-11-29 03:11:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 03:11:36,245 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:11:36,245 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:11:36,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077593261] [2023-11-29 03:11:36,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077593261] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:11:36,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:11:36,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:11:36,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301432405] [2023-11-29 03:11:36,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:11:36,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:11:36,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:11:36,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:11:36,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:11:36,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 84 [2023-11-29 03:11:36,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 240 transitions, 2064 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:11:36,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:11:36,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 84 [2023-11-29 03:11:36,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:11:39,128 INFO L124 PetriNetUnfolderBase]: 10881/19058 cut-off events. [2023-11-29 03:11:39,128 INFO L125 PetriNetUnfolderBase]: For 21256/21791 co-relation queries the response was YES. [2023-11-29 03:11:39,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55371 conditions, 19058 events. 10881/19058 cut-off events. For 21256/21791 co-relation queries the response was YES. Maximal size of possible extension queue 874. Compared 159765 event pairs, 8803 based on Foata normal form. 1298/17008 useless extension candidates. Maximal degree in co-relation 55325. Up to 15098 conditions per place. [2023-11-29 03:11:39,280 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 175 selfloop transitions, 42 changer transitions 0/238 dead transitions. [2023-11-29 03:11:39,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 238 transitions, 2494 flow [2023-11-29 03:11:39,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:11:39,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 03:11:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 230 transitions. [2023-11-29 03:11:39,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2023-11-29 03:11:39,281 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 230 transitions. [2023-11-29 03:11:39,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 230 transitions. [2023-11-29 03:11:39,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:11:39,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 230 transitions. [2023-11-29 03:11:39,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 46.0) internal successors, (230), 5 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) [2023-11-29 03:11:39,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:11:39,283 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:11:39,283 INFO L175 Difference]: Start difference. First operand has 166 places, 240 transitions, 2064 flow. Second operand 5 states and 230 transitions. [2023-11-29 03:11:39,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 238 transitions, 2494 flow [2023-11-29 03:11:39,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 238 transitions, 2432 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-11-29 03:11:39,436 INFO L231 Difference]: Finished difference. Result has 162 places, 238 transitions, 2082 flow [2023-11-29 03:11:39,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2082, PETRI_PLACES=162, PETRI_TRANSITIONS=238} [2023-11-29 03:11:39,437 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 79 predicate places. [2023-11-29 03:11:39,437 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 238 transitions, 2082 flow [2023-11-29 03:11:39,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:11:39,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:11:39,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:11:39,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-11-29 03:11:39,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:11:39,638 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:11:39,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:11:39,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1536686804, now seen corresponding path program 1 times [2023-11-29 03:11:39,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:11:39,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302094956] [2023-11-29 03:11:39,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:11:39,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:11:39,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:11:39,640 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:11:39,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-29 03:11:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:11:39,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 03:11:39,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:11:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:11:39,760 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:11:39,760 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:11:39,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302094956] [2023-11-29 03:11:39,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302094956] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:11:39,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:11:39,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:11:39,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185443381] [2023-11-29 03:11:39,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:11:39,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:11:39,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:11:39,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:11:39,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:11:39,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 84 [2023-11-29 03:11:39,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 238 transitions, 2082 flow. Second operand has 5 states, 5 states have (on average 40.6) internal successors, (203), 5 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:11:39,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:11:39,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 84 [2023-11-29 03:11:39,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:11:44,997 INFO L124 PetriNetUnfolderBase]: 21716/32342 cut-off events. [2023-11-29 03:11:44,997 INFO L125 PetriNetUnfolderBase]: For 79880/89559 co-relation queries the response was YES. [2023-11-29 03:11:45,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93119 conditions, 32342 events. 21716/32342 cut-off events. For 79880/89559 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 221369 event pairs, 3805 based on Foata normal form. 0/26308 useless extension candidates. Maximal degree in co-relation 93073. Up to 16811 conditions per place. [2023-11-29 03:11:45,341 INFO L140 encePairwiseOnDemand]: 77/84 looper letters, 366 selfloop transitions, 9 changer transitions 0/392 dead transitions. [2023-11-29 03:11:45,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 392 transitions, 3754 flow [2023-11-29 03:11:45,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:11:45,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 03:11:45,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 338 transitions. [2023-11-29 03:11:45,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6706349206349206 [2023-11-29 03:11:45,343 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 338 transitions. [2023-11-29 03:11:45,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 338 transitions. [2023-11-29 03:11:45,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:11:45,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 338 transitions. [2023-11-29 03:11:45,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 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) [2023-11-29 03:11:45,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:11:45,346 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:11:45,346 INFO L175 Difference]: Start difference. First operand has 162 places, 238 transitions, 2082 flow. Second operand 6 states and 338 transitions. [2023-11-29 03:11:45,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 392 transitions, 3754 flow [2023-11-29 03:11:45,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 392 transitions, 3688 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 03:11:45,437 INFO L231 Difference]: Finished difference. Result has 169 places, 247 transitions, 2086 flow [2023-11-29 03:11:45,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2086, PETRI_PLACES=169, PETRI_TRANSITIONS=247} [2023-11-29 03:11:45,438 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 86 predicate places. [2023-11-29 03:11:45,438 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 247 transitions, 2086 flow [2023-11-29 03:11:45,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.6) internal successors, (203), 5 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:11:45,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:11:45,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:11:45,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-11-29 03:11:45,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:11:45,639 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:11:45,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:11:45,639 INFO L85 PathProgramCache]: Analyzing trace with hash 25534892, now seen corresponding path program 1 times [2023-11-29 03:11:45,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:11:45,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021740565] [2023-11-29 03:11:45,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:11:45,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:11:45,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:11:45,641 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:11:45,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-29 03:11:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:11:45,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 03:11:45,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:11:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:11:45,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:11:46,215 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 25 treesize of output 21 [2023-11-29 03:11:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:11:46,290 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:11:46,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021740565] [2023-11-29 03:11:46,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021740565] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:11:46,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:11:46,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-29 03:11:46,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523363485] [2023-11-29 03:11:46,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:11:46,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 03:11:46,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:11:46,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 03:11:46,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 03:11:47,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 84 [2023-11-29 03:11:47,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 247 transitions, 2086 flow. Second operand has 10 states, 10 states have (on average 44.4) internal successors, (444), 10 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:11:47,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:11:47,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 84 [2023-11-29 03:11:47,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:11:53,176 INFO L124 PetriNetUnfolderBase]: 15460/25487 cut-off events. [2023-11-29 03:11:53,176 INFO L125 PetriNetUnfolderBase]: For 50708/55611 co-relation queries the response was YES. [2023-11-29 03:11:53,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76749 conditions, 25487 events. 15460/25487 cut-off events. For 50708/55611 co-relation queries the response was YES. Maximal size of possible extension queue 1005. Compared 202229 event pairs, 7438 based on Foata normal form. 21/22140 useless extension candidates. Maximal degree in co-relation 76698. Up to 13772 conditions per place. [2023-11-29 03:11:53,459 INFO L140 encePairwiseOnDemand]: 72/84 looper letters, 234 selfloop transitions, 72 changer transitions 0/331 dead transitions. [2023-11-29 03:11:53,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 331 transitions, 3150 flow [2023-11-29 03:11:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 03:11:53,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 03:11:53,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 443 transitions. [2023-11-29 03:11:53,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592261904761905 [2023-11-29 03:11:53,461 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 443 transitions. [2023-11-29 03:11:53,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 443 transitions. [2023-11-29 03:11:53,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:11:53,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 443 transitions. [2023-11-29 03:11:53,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 55.375) internal successors, (443), 8 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:11:53,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 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) [2023-11-29 03:11:53,463 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 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) [2023-11-29 03:11:53,463 INFO L175 Difference]: Start difference. First operand has 169 places, 247 transitions, 2086 flow. Second operand 8 states and 443 transitions. [2023-11-29 03:11:53,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 331 transitions, 3150 flow [2023-11-29 03:11:53,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 331 transitions, 3150 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 03:11:53,601 INFO L231 Difference]: Finished difference. Result has 177 places, 249 transitions, 2243 flow [2023-11-29 03:11:53,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=2086, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2243, PETRI_PLACES=177, PETRI_TRANSITIONS=249} [2023-11-29 03:11:53,602 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 94 predicate places. [2023-11-29 03:11:53,602 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 249 transitions, 2243 flow [2023-11-29 03:11:53,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 44.4) internal successors, (444), 10 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:11:53,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:11:53,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:11:53,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-11-29 03:11:53,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:11:53,803 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:11:53,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:11:53,803 INFO L85 PathProgramCache]: Analyzing trace with hash 25534888, now seen corresponding path program 1 times [2023-11-29 03:11:53,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:11:53,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919578757] [2023-11-29 03:11:53,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:11:53,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:11:53,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:11:53,804 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:11:53,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-29 03:11:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:11:53,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 03:11:53,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:11:54,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 03:11:54,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 03:11:54,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:11:54,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:11:54,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:11:54,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:11:54,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:11:54,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:11:54,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:11:54,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:11:54,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:11:54,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:11:54,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:11:54,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:11:54,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:11:54,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:11:54,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:11:54,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:11:54,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:11:54,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:11:54,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:11:54,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 03:11:54,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:11:54,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:11:54,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:11:54,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:11:54,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:11:54,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:11:54,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:11:54,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:11:54,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:11:54,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:11:54,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 03:11:54,601 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 03:11:54,601 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 [2023-11-29 03:11:54,684 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-29 03:11:54,685 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 16 treesize of output 18 [2023-11-29 03:11:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:11:54,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:11:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:11:55,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:11:55,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919578757] [2023-11-29 03:11:55,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919578757] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:11:55,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:11:55,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 03:11:55,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638432370] [2023-11-29 03:11:55,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:11:55,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 03:11:55,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:11:55,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 03:11:55,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:12:09,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:12:10,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2023-11-29 03:12:10,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 249 transitions, 2243 flow. Second operand has 14 states, 14 states have (on average 38.142857142857146) internal successors, (534), 14 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:10,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:12:10,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2023-11-29 03:12:10,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:12:19,609 INFO L124 PetriNetUnfolderBase]: 14968/24159 cut-off events. [2023-11-29 03:12:19,609 INFO L125 PetriNetUnfolderBase]: For 62342/68842 co-relation queries the response was YES. [2023-11-29 03:12:19,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77580 conditions, 24159 events. 14968/24159 cut-off events. For 62342/68842 co-relation queries the response was YES. Maximal size of possible extension queue 918. Compared 182079 event pairs, 4610 based on Foata normal form. 82/21587 useless extension candidates. Maximal degree in co-relation 77526. Up to 4798 conditions per place. [2023-11-29 03:12:19,882 INFO L140 encePairwiseOnDemand]: 66/84 looper letters, 217 selfloop transitions, 169 changer transitions 0/408 dead transitions. [2023-11-29 03:12:19,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 408 transitions, 3800 flow [2023-11-29 03:12:19,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 03:12:19,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 03:12:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 916 transitions. [2023-11-29 03:12:19,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5739348370927319 [2023-11-29 03:12:19,885 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 916 transitions. [2023-11-29 03:12:19,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 916 transitions. [2023-11-29 03:12:19,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:12:19,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 916 transitions. [2023-11-29 03:12:19,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 48.21052631578947) internal successors, (916), 19 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:19,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:19,891 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:19,891 INFO L175 Difference]: Start difference. First operand has 177 places, 249 transitions, 2243 flow. Second operand 19 states and 916 transitions. [2023-11-29 03:12:19,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 408 transitions, 3800 flow [2023-11-29 03:12:20,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 408 transitions, 3667 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-29 03:12:20,045 INFO L231 Difference]: Finished difference. Result has 193 places, 273 transitions, 2671 flow [2023-11-29 03:12:20,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=2121, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2671, PETRI_PLACES=193, PETRI_TRANSITIONS=273} [2023-11-29 03:12:20,046 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 110 predicate places. [2023-11-29 03:12:20,046 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 273 transitions, 2671 flow [2023-11-29 03:12:20,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 38.142857142857146) internal successors, (534), 14 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:20,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:12:20,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:12:20,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-11-29 03:12:20,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:12:20,247 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:12:20,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:12:20,248 INFO L85 PathProgramCache]: Analyzing trace with hash 25534890, now seen corresponding path program 1 times [2023-11-29 03:12:20,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:12:20,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577434457] [2023-11-29 03:12:20,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:12:20,248 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:12:20,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:12:20,249 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:12:20,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-29 03:12:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:12:20,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 03:12:20,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:12:20,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 03:12:20,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:12:20,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:12:20,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 03:12:20,617 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 03:12:20,617 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 [2023-11-29 03:12:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:12:20,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:12:21,195 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 03:12:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:12:21,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:12:21,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577434457] [2023-11-29 03:12:21,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577434457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:12:21,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:12:21,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 03:12:21,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449791520] [2023-11-29 03:12:21,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:12:21,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 03:12:21,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:12:21,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 03:12:21,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:12:28,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:12:28,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 84 [2023-11-29 03:12:28,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 273 transitions, 2671 flow. Second operand has 14 states, 14 states have (on average 40.142857142857146) internal successors, (562), 14 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:28,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:12:28,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 84 [2023-11-29 03:12:28,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:12:31,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:12:41,093 INFO L124 PetriNetUnfolderBase]: 14262/23211 cut-off events. [2023-11-29 03:12:41,093 INFO L125 PetriNetUnfolderBase]: For 74554/80959 co-relation queries the response was YES. [2023-11-29 03:12:41,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82041 conditions, 23211 events. 14262/23211 cut-off events. For 74554/80959 co-relation queries the response was YES. Maximal size of possible extension queue 918. Compared 178120 event pairs, 4987 based on Foata normal form. 40/21513 useless extension candidates. Maximal degree in co-relation 81985. Up to 4154 conditions per place. [2023-11-29 03:12:41,367 INFO L140 encePairwiseOnDemand]: 67/84 looper letters, 230 selfloop transitions, 191 changer transitions 1/447 dead transitions. [2023-11-29 03:12:41,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 447 transitions, 4390 flow [2023-11-29 03:12:41,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 03:12:41,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 03:12:41,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1330 transitions. [2023-11-29 03:12:41,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5459770114942529 [2023-11-29 03:12:41,371 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1330 transitions. [2023-11-29 03:12:41,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1330 transitions. [2023-11-29 03:12:41,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:12:41,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1330 transitions. [2023-11-29 03:12:41,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 45.86206896551724) internal successors, (1330), 29 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:41,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:41,379 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:41,380 INFO L175 Difference]: Start difference. First operand has 193 places, 273 transitions, 2671 flow. Second operand 29 states and 1330 transitions. [2023-11-29 03:12:41,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 447 transitions, 4390 flow [2023-11-29 03:12:41,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 447 transitions, 4214 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-11-29 03:12:41,532 INFO L231 Difference]: Finished difference. Result has 214 places, 290 transitions, 3106 flow [2023-11-29 03:12:41,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=2487, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3106, PETRI_PLACES=214, PETRI_TRANSITIONS=290} [2023-11-29 03:12:41,532 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 131 predicate places. [2023-11-29 03:12:41,532 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 290 transitions, 3106 flow [2023-11-29 03:12:41,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 40.142857142857146) internal successors, (562), 14 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:41,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:12:41,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:12:41,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-11-29 03:12:41,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:12:41,733 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:12:41,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:12:41,734 INFO L85 PathProgramCache]: Analyzing trace with hash 25534891, now seen corresponding path program 1 times [2023-11-29 03:12:41,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:12:41,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647105238] [2023-11-29 03:12:41,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:12:41,734 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:12:41,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:12:41,735 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:12:41,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-29 03:12:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:12:41,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 03:12:41,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:12:41,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:12:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 03:12:41,881 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:12:41,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:12:41,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647105238] [2023-11-29 03:12:41,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647105238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:12:41,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:12:41,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:12:41,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720281204] [2023-11-29 03:12:41,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:12:41,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:12:41,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:12:41,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:12:41,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:12:42,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2023-11-29 03:12:42,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 290 transitions, 3106 flow. Second operand has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:42,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:12:42,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2023-11-29 03:12:42,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:12:45,061 INFO L124 PetriNetUnfolderBase]: 11128/17716 cut-off events. [2023-11-29 03:12:45,061 INFO L125 PetriNetUnfolderBase]: For 79883/84888 co-relation queries the response was YES. [2023-11-29 03:12:45,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70139 conditions, 17716 events. 11128/17716 cut-off events. For 79883/84888 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 124625 event pairs, 8220 based on Foata normal form. 762/17882 useless extension candidates. Maximal degree in co-relation 70078. Up to 15281 conditions per place. [2023-11-29 03:12:45,285 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 237 selfloop transitions, 19 changer transitions 0/281 dead transitions. [2023-11-29 03:12:45,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 281 transitions, 3557 flow [2023-11-29 03:12:45,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:12:45,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 03:12:45,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 194 transitions. [2023-11-29 03:12:45,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2023-11-29 03:12:45,286 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 194 transitions. [2023-11-29 03:12:45,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 194 transitions. [2023-11-29 03:12:45,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:12:45,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 194 transitions. [2023-11-29 03:12:45,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:45,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:45,287 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:45,287 INFO L175 Difference]: Start difference. First operand has 214 places, 290 transitions, 3106 flow. Second operand 4 states and 194 transitions. [2023-11-29 03:12:45,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 281 transitions, 3557 flow [2023-11-29 03:12:45,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 281 transitions, 3238 flow, removed 0 selfloop flow, removed 25 redundant places. [2023-11-29 03:12:45,409 INFO L231 Difference]: Finished difference. Result has 190 places, 281 transitions, 2764 flow [2023-11-29 03:12:45,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=2726, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2764, PETRI_PLACES=190, PETRI_TRANSITIONS=281} [2023-11-29 03:12:45,409 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 107 predicate places. [2023-11-29 03:12:45,409 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 281 transitions, 2764 flow [2023-11-29 03:12:45,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:45,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:12:45,410 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:12:45,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-11-29 03:12:45,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:12:45,610 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:12:45,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:12:45,610 INFO L85 PathProgramCache]: Analyzing trace with hash -2107470996, now seen corresponding path program 1 times [2023-11-29 03:12:45,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:12:45,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221287994] [2023-11-29 03:12:45,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:12:45,611 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:12:45,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:12:45,612 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:12:45,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-29 03:12:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:12:45,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 03:12:45,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:12:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:12:45,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:12:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:12:46,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:12:46,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221287994] [2023-11-29 03:12:46,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221287994] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:12:46,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:12:46,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-29 03:12:46,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178071783] [2023-11-29 03:12:46,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:12:46,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 03:12:46,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:12:46,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 03:12:46,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:12:46,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 84 [2023-11-29 03:12:46,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 281 transitions, 2764 flow. Second operand has 14 states, 14 states have (on average 43.285714285714285) internal successors, (606), 14 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:46,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:12:46,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 84 [2023-11-29 03:12:46,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:12:52,753 INFO L124 PetriNetUnfolderBase]: 17960/28884 cut-off events. [2023-11-29 03:12:52,753 INFO L125 PetriNetUnfolderBase]: For 96527/99113 co-relation queries the response was YES. [2023-11-29 03:12:52,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108496 conditions, 28884 events. 17960/28884 cut-off events. For 96527/99113 co-relation queries the response was YES. Maximal size of possible extension queue 988. Compared 219713 event pairs, 11161 based on Foata normal form. 748/28744 useless extension candidates. Maximal degree in co-relation 108436. Up to 15857 conditions per place. [2023-11-29 03:12:53,062 INFO L140 encePairwiseOnDemand]: 70/84 looper letters, 252 selfloop transitions, 160 changer transitions 0/436 dead transitions. [2023-11-29 03:12:53,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 436 transitions, 4639 flow [2023-11-29 03:12:53,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 03:12:53,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 03:12:53,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 726 transitions. [2023-11-29 03:12:53,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6173469387755102 [2023-11-29 03:12:53,064 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 726 transitions. [2023-11-29 03:12:53,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 726 transitions. [2023-11-29 03:12:53,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:12:53,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 726 transitions. [2023-11-29 03:12:53,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 51.857142857142854) internal successors, (726), 14 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:53,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 84.0) internal successors, (1260), 15 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:53,066 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 84.0) internal successors, (1260), 15 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:53,066 INFO L175 Difference]: Start difference. First operand has 190 places, 281 transitions, 2764 flow. Second operand 14 states and 726 transitions. [2023-11-29 03:12:53,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 436 transitions, 4639 flow [2023-11-29 03:12:53,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 436 transitions, 4619 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:12:53,280 INFO L231 Difference]: Finished difference. Result has 205 places, 286 transitions, 3200 flow [2023-11-29 03:12:53,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3200, PETRI_PLACES=205, PETRI_TRANSITIONS=286} [2023-11-29 03:12:53,281 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 122 predicate places. [2023-11-29 03:12:53,281 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 286 transitions, 3200 flow [2023-11-29 03:12:53,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 43.285714285714285) internal successors, (606), 14 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:53,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:12:53,282 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:12:53,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2023-11-29 03:12:53,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:12:53,482 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:12:53,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:12:53,482 INFO L85 PathProgramCache]: Analyzing trace with hash 501463905, now seen corresponding path program 1 times [2023-11-29 03:12:53,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:12:53,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111137359] [2023-11-29 03:12:53,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:12:53,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:12:53,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:12:53,484 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:12:53,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-11-29 03:12:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:12:53,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 03:12:53,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:12:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:12:53,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:12:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:12:54,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:12:54,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111137359] [2023-11-29 03:12:54,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111137359] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:12:54,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:12:54,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-29 03:12:54,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913336805] [2023-11-29 03:12:54,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:12:54,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 03:12:54,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:12:54,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 03:12:54,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:12:54,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 84 [2023-11-29 03:12:54,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 286 transitions, 3200 flow. Second operand has 14 states, 14 states have (on average 43.642857142857146) internal successors, (611), 14 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:54,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:12:54,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 84 [2023-11-29 03:12:54,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:12:59,121 INFO L124 PetriNetUnfolderBase]: 13149/20719 cut-off events. [2023-11-29 03:12:59,121 INFO L125 PetriNetUnfolderBase]: For 97207/103661 co-relation queries the response was YES. [2023-11-29 03:12:59,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83369 conditions, 20719 events. 13149/20719 cut-off events. For 97207/103661 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 145128 event pairs, 8491 based on Foata normal form. 347/20411 useless extension candidates. Maximal degree in co-relation 83304. Up to 14265 conditions per place. [2023-11-29 03:12:59,450 INFO L140 encePairwiseOnDemand]: 70/84 looper letters, 189 selfloop transitions, 160 changer transitions 0/373 dead transitions. [2023-11-29 03:12:59,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 373 transitions, 4363 flow [2023-11-29 03:12:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 03:12:59,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 03:12:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 714 transitions. [2023-11-29 03:12:59,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2023-11-29 03:12:59,452 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 714 transitions. [2023-11-29 03:12:59,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 714 transitions. [2023-11-29 03:12:59,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:12:59,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 714 transitions. [2023-11-29 03:12:59,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 51.0) internal successors, (714), 14 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:59,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 84.0) internal successors, (1260), 15 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:59,455 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 84.0) internal successors, (1260), 15 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:59,455 INFO L175 Difference]: Start difference. First operand has 205 places, 286 transitions, 3200 flow. Second operand 14 states and 714 transitions. [2023-11-29 03:12:59,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 373 transitions, 4363 flow [2023-11-29 03:12:59,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 373 transitions, 4101 flow, removed 18 selfloop flow, removed 10 redundant places. [2023-11-29 03:12:59,787 INFO L231 Difference]: Finished difference. Result has 210 places, 286 transitions, 3339 flow [2023-11-29 03:12:59,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=2935, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3339, PETRI_PLACES=210, PETRI_TRANSITIONS=286} [2023-11-29 03:12:59,788 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 127 predicate places. [2023-11-29 03:12:59,788 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 286 transitions, 3339 flow [2023-11-29 03:12:59,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 43.642857142857146) internal successors, (611), 14 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:12:59,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:12:59,788 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:12:59,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2023-11-29 03:12:59,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:12:59,989 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:12:59,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:12:59,990 INFO L85 PathProgramCache]: Analyzing trace with hash 429677712, now seen corresponding path program 2 times [2023-11-29 03:12:59,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:12:59,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162710122] [2023-11-29 03:12:59,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:12:59,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:12:59,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:12:59,991 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:12:59,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-11-29 03:13:00,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 03:13:00,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:13:00,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 03:13:00,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:13:00,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 03:13:00,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 03:13:00,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 03:13:00,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 03:13:00,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:00,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 03:13:00,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 03:13:00,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:13:00,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:00,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:00,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 03:13:00,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 03:13:00,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:00,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 03:13:00,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 03:13:00,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:13:00,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:00,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:13:00,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:00,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:13:00,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 03:13:00,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:13:00,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:00,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:00,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 03:13:00,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 03:13:00,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:00,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 03:13:00,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 03:13:00,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:13:00,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:00,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:00,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 03:13:00,651 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 03:13:00,651 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 [2023-11-29 03:13:00,701 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-29 03:13:00,702 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 16 treesize of output 18 [2023-11-29 03:13:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 03:13:01,006 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:13:01,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:13:01,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162710122] [2023-11-29 03:13:01,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162710122] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:13:01,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:13:01,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:13:01,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293630363] [2023-11-29 03:13:01,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:13:01,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 03:13:01,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:13:01,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 03:13:01,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 03:13:01,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2023-11-29 03:13:01,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 286 transitions, 3339 flow. Second operand has 6 states, 6 states have (on average 39.333333333333336) internal successors, (236), 6 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:13:01,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:13:01,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2023-11-29 03:13:01,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:13:06,776 INFO L124 PetriNetUnfolderBase]: 16902/26396 cut-off events. [2023-11-29 03:13:06,776 INFO L125 PetriNetUnfolderBase]: For 112273/114397 co-relation queries the response was YES. [2023-11-29 03:13:07,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108507 conditions, 26396 events. 16902/26396 cut-off events. For 112273/114397 co-relation queries the response was YES. Maximal size of possible extension queue 1009. Compared 186297 event pairs, 7674 based on Foata normal form. 814/26229 useless extension candidates. Maximal degree in co-relation 108441. Up to 14343 conditions per place. [2023-11-29 03:13:07,351 INFO L140 encePairwiseOnDemand]: 73/84 looper letters, 309 selfloop transitions, 73 changer transitions 0/405 dead transitions. [2023-11-29 03:13:07,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 405 transitions, 5247 flow [2023-11-29 03:13:07,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 03:13:07,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 03:13:07,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 338 transitions. [2023-11-29 03:13:07,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2023-11-29 03:13:07,353 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 338 transitions. [2023-11-29 03:13:07,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 338 transitions. [2023-11-29 03:13:07,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:13:07,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 338 transitions. [2023-11-29 03:13:07,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 48.285714285714285) internal successors, (338), 7 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) [2023-11-29 03:13:07,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:13:07,356 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:13:07,356 INFO L175 Difference]: Start difference. First operand has 210 places, 286 transitions, 3339 flow. Second operand 7 states and 338 transitions. [2023-11-29 03:13:07,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 405 transitions, 5247 flow [2023-11-29 03:13:07,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 405 transitions, 4922 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-11-29 03:13:07,780 INFO L231 Difference]: Finished difference. Result has 208 places, 307 transitions, 3497 flow [2023-11-29 03:13:07,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3497, PETRI_PLACES=208, PETRI_TRANSITIONS=307} [2023-11-29 03:13:07,781 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 125 predicate places. [2023-11-29 03:13:07,781 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 307 transitions, 3497 flow [2023-11-29 03:13:07,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.333333333333336) internal successors, (236), 6 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:13:07,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:13:07,781 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2023-11-29 03:13:07,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2023-11-29 03:13:07,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:13:07,981 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:13:07,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:13:07,982 INFO L85 PathProgramCache]: Analyzing trace with hash -375270769, now seen corresponding path program 3 times [2023-11-29 03:13:07,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:13:07,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243572040] [2023-11-29 03:13:07,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:13:07,982 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:13:07,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:13:07,983 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:13:07,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-11-29 03:13:08,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 03:13:08,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:13:08,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 03:13:08,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:13:08,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 03:13:08,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:08,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:13:08,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 03:13:08,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:08,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:13:08,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:08,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:13:08,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:08,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:13:08,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:08,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:13:08,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:13:08,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:08,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:08,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:13:08,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:08,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:13:08,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:08,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:13:08,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:08,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:13:08,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:13:08,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:13:08,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:13:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:13:09,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:13:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:13:12,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:13:12,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243572040] [2023-11-29 03:13:12,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243572040] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:13:12,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:13:12,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-11-29 03:13:12,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435930626] [2023-11-29 03:13:12,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:13:12,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 03:13:12,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:13:12,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 03:13:12,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2023-11-29 03:13:23,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2023-11-29 03:13:23,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 307 transitions, 3497 flow. Second operand has 26 states, 26 states have (on average 40.76923076923077) internal successors, (1060), 26 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:13:23,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:13:23,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2023-11-29 03:13:23,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:13:54,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:13:58,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:02,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:05,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:09,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:13,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:17,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:21,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:25,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:27,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:33,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:39,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:43,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:47,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:51,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:55,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:14:59,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:15:03,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:15:07,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:15:11,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:15:15,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:15:17,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:15:21,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:15:25,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:15:29,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:15:32,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 03:15:35,157 INFO L124 PetriNetUnfolderBase]: 13819/22801 cut-off events. [2023-11-29 03:15:35,157 INFO L125 PetriNetUnfolderBase]: For 124179/127286 co-relation queries the response was YES. [2023-11-29 03:15:35,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101413 conditions, 22801 events. 13819/22801 cut-off events. For 124179/127286 co-relation queries the response was YES. Maximal size of possible extension queue 936. Compared 172828 event pairs, 10201 based on Foata normal form. 34/21797 useless extension candidates. Maximal degree in co-relation 101345. Up to 18994 conditions per place. [2023-11-29 03:15:35,736 INFO L140 encePairwiseOnDemand]: 71/84 looper letters, 150 selfloop transitions, 251 changer transitions 0/424 dead transitions. [2023-11-29 03:15:35,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 424 transitions, 5876 flow [2023-11-29 03:15:35,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-29 03:15:35,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-11-29 03:15:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2335 transitions. [2023-11-29 03:15:35,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5147707231040565 [2023-11-29 03:15:35,742 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2335 transitions. [2023-11-29 03:15:35,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2335 transitions. [2023-11-29 03:15:35,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:15:35,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2335 transitions. [2023-11-29 03:15:35,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 43.24074074074074) internal successors, (2335), 54 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:15:35,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 84.0) internal successors, (4620), 55 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:15:35,749 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 84.0) internal successors, (4620), 55 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:15:35,750 INFO L175 Difference]: Start difference. First operand has 208 places, 307 transitions, 3497 flow. Second operand 54 states and 2335 transitions. [2023-11-29 03:15:35,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 424 transitions, 5876 flow [2023-11-29 03:15:36,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 424 transitions, 5762 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-29 03:15:36,133 INFO L231 Difference]: Finished difference. Result has 274 places, 406 transitions, 5376 flow [2023-11-29 03:15:36,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=3413, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=5376, PETRI_PLACES=274, PETRI_TRANSITIONS=406} [2023-11-29 03:15:36,134 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 191 predicate places. [2023-11-29 03:15:36,134 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 406 transitions, 5376 flow [2023-11-29 03:15:36,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 40.76923076923077) internal successors, (1060), 26 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:15:36,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:15:36,135 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:15:36,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2023-11-29 03:15:36,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:15:36,336 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:15:36,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:15:36,336 INFO L85 PathProgramCache]: Analyzing trace with hash -635088434, now seen corresponding path program 2 times [2023-11-29 03:15:36,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:15:36,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99375693] [2023-11-29 03:15:36,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:15:36,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:15:36,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:15:36,337 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:15:36,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-11-29 03:15:36,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 03:15:36,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:15:36,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 03:15:36,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:15:36,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:15:36,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 03:15:36,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:36,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:15:36,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:15:36,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:36,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:15:36,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:36,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:15:36,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:15:36,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:36,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:15:36,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:15:36,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:36,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:15:36,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:36,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:15:36,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:15:36,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:36,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:15:36,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:15:36,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:36,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:15:36,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:36,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:36,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:15:36,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:36,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:15:36,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:15:36,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 03:15:36,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:36,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 03:15:37,008 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 03:15:37,008 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 [2023-11-29 03:15:37,053 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-29 03:15:37,053 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 16 treesize of output 18 [2023-11-29 03:15:37,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 03:15:37,184 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:15:37,184 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:15:37,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99375693] [2023-11-29 03:15:37,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99375693] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:15:37,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:15:37,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:15:37,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559844750] [2023-11-29 03:15:37,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:15:37,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 03:15:37,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:15:37,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 03:15:37,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 03:15:37,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 84 [2023-11-29 03:15:37,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 406 transitions, 5376 flow. Second operand has 6 states, 6 states have (on average 40.666666666666664) internal successors, (244), 6 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:15:37,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:15:37,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 84 [2023-11-29 03:15:37,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:15:43,720 INFO L124 PetriNetUnfolderBase]: 16228/25657 cut-off events. [2023-11-29 03:15:43,720 INFO L125 PetriNetUnfolderBase]: For 116693/119434 co-relation queries the response was YES. [2023-11-29 03:15:44,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110893 conditions, 25657 events. 16228/25657 cut-off events. For 116693/119434 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 184341 event pairs, 8698 based on Foata normal form. 345/24995 useless extension candidates. Maximal degree in co-relation 110808. Up to 16715 conditions per place. [2023-11-29 03:15:44,284 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 383 selfloop transitions, 72 changer transitions 0/480 dead transitions. [2023-11-29 03:15:44,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 480 transitions, 6936 flow [2023-11-29 03:15:44,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 03:15:44,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 03:15:44,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 333 transitions. [2023-11-29 03:15:44,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663265306122449 [2023-11-29 03:15:44,286 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 333 transitions. [2023-11-29 03:15:44,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 333 transitions. [2023-11-29 03:15:44,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:15:44,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 333 transitions. [2023-11-29 03:15:44,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 47.57142857142857) internal successors, (333), 7 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:15:44,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:15:44,288 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:15:44,288 INFO L175 Difference]: Start difference. First operand has 274 places, 406 transitions, 5376 flow. Second operand 7 states and 333 transitions. [2023-11-29 03:15:44,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 480 transitions, 6936 flow [2023-11-29 03:15:44,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 480 transitions, 6460 flow, removed 83 selfloop flow, removed 20 redundant places. [2023-11-29 03:15:44,881 INFO L231 Difference]: Finished difference. Result has 262 places, 411 transitions, 5111 flow [2023-11-29 03:15:44,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=4900, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5111, PETRI_PLACES=262, PETRI_TRANSITIONS=411} [2023-11-29 03:15:44,881 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 179 predicate places. [2023-11-29 03:15:44,882 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 411 transitions, 5111 flow [2023-11-29 03:15:44,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.666666666666664) internal successors, (244), 6 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:15:44,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:15:44,882 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:15:44,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2023-11-29 03:15:45,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:15:45,082 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:15:45,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:15:45,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2146071431, now seen corresponding path program 2 times [2023-11-29 03:15:45,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:15:45,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818330692] [2023-11-29 03:15:45,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:15:45,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:15:45,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:15:45,084 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:15:45,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-11-29 03:15:45,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:15:45,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:15:45,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 03:15:45,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:15:45,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 03:15:45,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-29 03:15:45,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:45,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:15:45,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:15:45,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:45,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:15:45,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:15:45,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:45,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:15:45,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:45,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:15:45,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:15:45,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:45,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:15:45,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:15:45,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:45,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:45,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:15:45,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:15:45,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 03:15:45,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:45,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:15:45,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:15:45,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:45,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:15:45,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:15:45,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:45,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:15:45,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:15:45,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:15:45,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:15:45,765 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 21 treesize of output 14 [2023-11-29 03:15:45,775 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 03:15:45,775 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 [2023-11-29 03:15:45,853 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-29 03:15:45,853 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 21 treesize of output 21 [2023-11-29 03:15:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 03:15:46,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:15:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 03:15:47,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:15:47,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818330692] [2023-11-29 03:15:47,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818330692] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:15:47,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:15:47,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-11-29 03:15:47,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822535449] [2023-11-29 03:15:47,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:15:47,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 03:15:47,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:15:47,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 03:15:47,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-11-29 03:15:53,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:16:00,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:16:05,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 84 [2023-11-29 03:16:05,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 411 transitions, 5111 flow. Second operand has 16 states, 16 states have (on average 36.125) internal successors, (578), 16 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:16:05,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:16:05,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 84 [2023-11-29 03:16:05,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:16:17,109 INFO L124 PetriNetUnfolderBase]: 20321/33627 cut-off events. [2023-11-29 03:16:17,109 INFO L125 PetriNetUnfolderBase]: For 193433/195698 co-relation queries the response was YES. [2023-11-29 03:16:17,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156274 conditions, 33627 events. 20321/33627 cut-off events. For 193433/195698 co-relation queries the response was YES. Maximal size of possible extension queue 1274. Compared 269902 event pairs, 6301 based on Foata normal form. 935/33264 useless extension candidates. Maximal degree in co-relation 156186. Up to 11796 conditions per place. [2023-11-29 03:16:17,707 INFO L140 encePairwiseOnDemand]: 72/84 looper letters, 476 selfloop transitions, 135 changer transitions 0/633 dead transitions. [2023-11-29 03:16:17,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 633 transitions, 8479 flow [2023-11-29 03:16:17,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 03:16:17,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 03:16:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 609 transitions. [2023-11-29 03:16:17,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2023-11-29 03:16:17,710 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 609 transitions. [2023-11-29 03:16:17,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 609 transitions. [2023-11-29 03:16:17,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:16:17,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 609 transitions. [2023-11-29 03:16:17,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 46.84615384615385) internal successors, (609), 13 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:16:17,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 84.0) internal successors, (1176), 14 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:16:17,712 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 84.0) internal successors, (1176), 14 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:16:17,712 INFO L175 Difference]: Start difference. First operand has 262 places, 411 transitions, 5111 flow. Second operand 13 states and 609 transitions. [2023-11-29 03:16:17,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 633 transitions, 8479 flow [2023-11-29 03:16:18,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 633 transitions, 8311 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-29 03:16:18,548 INFO L231 Difference]: Finished difference. Result has 273 places, 422 transitions, 5465 flow [2023-11-29 03:16:18,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=4997, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5465, PETRI_PLACES=273, PETRI_TRANSITIONS=422} [2023-11-29 03:16:18,549 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 190 predicate places. [2023-11-29 03:16:18,549 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 422 transitions, 5465 flow [2023-11-29 03:16:18,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 36.125) internal successors, (578), 16 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:16:18,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:16:18,549 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:16:18,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2023-11-29 03:16:18,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:16:18,750 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:16:18,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:16:18,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2103705623, now seen corresponding path program 1 times [2023-11-29 03:16:18,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:16:18,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402676625] [2023-11-29 03:16:18,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:16:18,750 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:16:18,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:16:18,751 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:16:18,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-11-29 03:16:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:16:19,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 03:16:19,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:16:19,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 03:16:19,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:16:19,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:16:19,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:16:19,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:16:19,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:16:19,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:16:19,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:16:19,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:16:19,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:16:19,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:16:19,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:16:19,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:16:19,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:16:19,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:16:19,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:16:19,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:16:19,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:16:19,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 03:16:19,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:16:19,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:16:19,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:16:19,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:16:19,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:16:19,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:16:19,462 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-29 03:16:19,462 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 21 treesize of output 21 [2023-11-29 03:16:19,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:16:19,662 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-29 03:16:19,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2023-11-29 03:16:19,679 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 03:16:19,679 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 [2023-11-29 03:16:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 03:16:20,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:16:20,808 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 10 treesize of output 8 [2023-11-29 03:16:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 03:16:21,193 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:16:21,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402676625] [2023-11-29 03:16:21,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402676625] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:16:21,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:16:21,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-11-29 03:16:21,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754047035] [2023-11-29 03:16:21,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:16:21,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 03:16:21,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:16:21,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 03:16:21,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-29 03:16:27,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:16:33,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:16:37,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:16:42,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:16:45,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:16:51,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:16:51,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 84 [2023-11-29 03:16:51,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 422 transitions, 5465 flow. Second operand has 16 states, 16 states have (on average 34.25) internal successors, (548), 16 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:16:51,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:16:51,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 84 [2023-11-29 03:16:51,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:16:58,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:17:00,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:17:12,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:17:34,671 INFO L124 PetriNetUnfolderBase]: 34013/54553 cut-off events. [2023-11-29 03:17:34,671 INFO L125 PetriNetUnfolderBase]: For 397406/404832 co-relation queries the response was YES. [2023-11-29 03:17:35,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271232 conditions, 54553 events. 34013/54553 cut-off events. For 397406/404832 co-relation queries the response was YES. Maximal size of possible extension queue 1762. Compared 448717 event pairs, 13604 based on Foata normal form. 1352/53609 useless extension candidates. Maximal degree in co-relation 271141. Up to 12999 conditions per place. [2023-11-29 03:17:35,823 INFO L140 encePairwiseOnDemand]: 70/84 looper letters, 522 selfloop transitions, 298 changer transitions 3/846 dead transitions. [2023-11-29 03:17:35,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 846 transitions, 11222 flow [2023-11-29 03:17:35,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-29 03:17:35,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-29 03:17:35,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 1708 transitions. [2023-11-29 03:17:35,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2023-11-29 03:17:35,827 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 1708 transitions. [2023-11-29 03:17:35,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 1708 transitions. [2023-11-29 03:17:35,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:17:35,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 1708 transitions. [2023-11-29 03:17:35,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 39.72093023255814) internal successors, (1708), 43 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:17:35,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 84.0) internal successors, (3696), 44 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:17:35,834 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 84.0) internal successors, (3696), 44 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:17:35,834 INFO L175 Difference]: Start difference. First operand has 273 places, 422 transitions, 5465 flow. Second operand 43 states and 1708 transitions. [2023-11-29 03:17:35,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 846 transitions, 11222 flow [2023-11-29 03:17:39,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 846 transitions, 11184 flow, removed 19 selfloop flow, removed 0 redundant places. [2023-11-29 03:17:39,911 INFO L231 Difference]: Finished difference. Result has 324 places, 459 transitions, 6690 flow [2023-11-29 03:17:39,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=5400, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=6690, PETRI_PLACES=324, PETRI_TRANSITIONS=459} [2023-11-29 03:17:39,912 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 241 predicate places. [2023-11-29 03:17:39,912 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 459 transitions, 6690 flow [2023-11-29 03:17:39,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 34.25) internal successors, (548), 16 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:17:39,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:17:39,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:17:39,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2023-11-29 03:17:40,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:17:40,113 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:17:40,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:17:40,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1033833505, now seen corresponding path program 1 times [2023-11-29 03:17:40,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:17:40,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935679749] [2023-11-29 03:17:40,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:17:40,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:17:40,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:17:40,115 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:17:40,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-11-29 03:17:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:17:40,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 03:17:40,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:17:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 03:17:40,347 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:17:40,347 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:17:40,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935679749] [2023-11-29 03:17:40,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935679749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:17:40,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:17:40,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 03:17:40,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076214203] [2023-11-29 03:17:40,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:17:40,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 03:17:40,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:17:40,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 03:17:40,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 03:17:40,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 84 [2023-11-29 03:17:40,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 459 transitions, 6690 flow. Second operand has 7 states, 7 states have (on average 44.714285714285715) internal successors, (313), 7 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:17:40,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:17:40,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 84 [2023-11-29 03:17:40,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:18:05,425 INFO L124 PetriNetUnfolderBase]: 60182/99409 cut-off events. [2023-11-29 03:18:05,426 INFO L125 PetriNetUnfolderBase]: For 754604/769757 co-relation queries the response was YES. [2023-11-29 03:18:07,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473535 conditions, 99409 events. 60182/99409 cut-off events. For 754604/769757 co-relation queries the response was YES. Maximal size of possible extension queue 3037. Compared 912596 event pairs, 18228 based on Foata normal form. 355/93946 useless extension candidates. Maximal degree in co-relation 473433. Up to 33027 conditions per place. [2023-11-29 03:18:07,609 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 712 selfloop transitions, 84 changer transitions 0/823 dead transitions. [2023-11-29 03:18:07,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 823 transitions, 13351 flow [2023-11-29 03:18:07,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 03:18:07,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 03:18:07,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 430 transitions. [2023-11-29 03:18:07,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6398809523809523 [2023-11-29 03:18:07,611 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 430 transitions. [2023-11-29 03:18:07,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 430 transitions. [2023-11-29 03:18:07,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:18:07,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 430 transitions. [2023-11-29 03:18:07,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 53.75) internal successors, (430), 8 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:18:07,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 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) [2023-11-29 03:18:07,612 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 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) [2023-11-29 03:18:07,612 INFO L175 Difference]: Start difference. First operand has 324 places, 459 transitions, 6690 flow. Second operand 8 states and 430 transitions. [2023-11-29 03:18:07,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 823 transitions, 13351 flow [2023-11-29 03:18:14,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 823 transitions, 12978 flow, removed 53 selfloop flow, removed 10 redundant places. [2023-11-29 03:18:14,633 INFO L231 Difference]: Finished difference. Result has 325 places, 508 transitions, 7482 flow [2023-11-29 03:18:14,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=6457, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7482, PETRI_PLACES=325, PETRI_TRANSITIONS=508} [2023-11-29 03:18:14,634 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 242 predicate places. [2023-11-29 03:18:14,634 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 508 transitions, 7482 flow [2023-11-29 03:18:14,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 44.714285714285715) internal successors, (313), 7 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:18:14,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:18:14,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:18:14,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2023-11-29 03:18:14,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:18:14,835 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:18:14,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:18:14,836 INFO L85 PathProgramCache]: Analyzing trace with hash 161172935, now seen corresponding path program 2 times [2023-11-29 03:18:14,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:18:14,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164172504] [2023-11-29 03:18:14,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:18:14,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:18:14,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:18:14,837 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:18:14,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-11-29 03:18:14,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 03:18:14,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:18:14,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 03:18:14,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:18:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 03:18:15,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:18:15,063 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:18:15,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164172504] [2023-11-29 03:18:15,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164172504] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:18:15,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:18:15,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 03:18:15,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018197427] [2023-11-29 03:18:15,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:18:15,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 03:18:15,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:18:15,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 03:18:15,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 03:18:15,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 84 [2023-11-29 03:18:15,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 508 transitions, 7482 flow. Second operand has 7 states, 7 states have (on average 44.714285714285715) internal successors, (313), 7 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:18:15,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:18:15,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 84 [2023-11-29 03:18:15,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:18:41,293 INFO L124 PetriNetUnfolderBase]: 62671/102367 cut-off events. [2023-11-29 03:18:41,293 INFO L125 PetriNetUnfolderBase]: For 892355/912436 co-relation queries the response was YES. [2023-11-29 03:18:43,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521084 conditions, 102367 events. 62671/102367 cut-off events. For 892355/912436 co-relation queries the response was YES. Maximal size of possible extension queue 2986. Compared 909023 event pairs, 8506 based on Foata normal form. 1624/100761 useless extension candidates. Maximal degree in co-relation 520981. Up to 42706 conditions per place. [2023-11-29 03:18:43,727 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 711 selfloop transitions, 100 changer transitions 0/838 dead transitions. [2023-11-29 03:18:43,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 838 transitions, 13609 flow [2023-11-29 03:18:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 03:18:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 03:18:43,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 483 transitions. [2023-11-29 03:18:43,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2023-11-29 03:18:43,729 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 483 transitions. [2023-11-29 03:18:43,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 483 transitions. [2023-11-29 03:18:43,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:18:43,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 483 transitions. [2023-11-29 03:18:43,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 53.666666666666664) internal successors, (483), 9 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:18:43,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:18:43,731 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:18:43,731 INFO L175 Difference]: Start difference. First operand has 325 places, 508 transitions, 7482 flow. Second operand 9 states and 483 transitions. [2023-11-29 03:18:43,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 838 transitions, 13609 flow [2023-11-29 03:18:52,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 838 transitions, 13583 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:18:52,473 INFO L231 Difference]: Finished difference. Result has 333 places, 518 transitions, 7819 flow [2023-11-29 03:18:52,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=7456, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7819, PETRI_PLACES=333, PETRI_TRANSITIONS=518} [2023-11-29 03:18:52,473 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 250 predicate places. [2023-11-29 03:18:52,473 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 518 transitions, 7819 flow [2023-11-29 03:18:52,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 44.714285714285715) internal successors, (313), 7 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:18:52,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:18:52,474 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:18:52,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2023-11-29 03:18:52,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:18:52,674 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:18:52,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:18:52,675 INFO L85 PathProgramCache]: Analyzing trace with hash -931194522, now seen corresponding path program 2 times [2023-11-29 03:18:52,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:18:52,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538677514] [2023-11-29 03:18:52,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:18:52,675 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:18:52,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:18:52,676 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:18:52,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-11-29 03:18:52,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:18:52,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:18:52,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 03:18:52,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:18:52,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-29 03:18:52,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2023-11-29 03:18:52,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:52,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:18:52,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:52,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:18:53,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:18:53,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:18:53,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:18:53,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:18:53,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:18:53,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:18:53,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:18:53,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:18:53,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:18:53,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:18:53,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:18:53,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:18:53,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:18:53,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:18:53,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:18:53,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:18:53,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:18:53,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:18:53,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:18:53,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:18:53,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:18:53,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:18:53,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:18:53,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 03:18:53,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 03:18:53,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 03:18:53,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 03:18:53,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:18:53,359 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 21 treesize of output 14 [2023-11-29 03:18:53,375 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 03:18:53,375 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 [2023-11-29 03:18:53,444 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-29 03:18:53,444 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 16 treesize of output 18 [2023-11-29 03:18:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 03:18:53,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:18:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 03:18:58,866 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:18:58,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538677514] [2023-11-29 03:18:58,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538677514] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:18:58,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:18:58,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-11-29 03:18:58,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577274579] [2023-11-29 03:18:58,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:18:58,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 03:18:58,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:18:58,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 03:18:58,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=190, Unknown=1, NotChecked=0, Total=240 [2023-11-29 03:19:09,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:19:14,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2023-11-29 03:19:14,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 518 transitions, 7819 flow. Second operand has 16 states, 16 states have (on average 38.375) internal successors, (614), 16 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:14,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:19:14,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2023-11-29 03:19:14,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:19:56,363 INFO L124 PetriNetUnfolderBase]: 92552/145185 cut-off events. [2023-11-29 03:19:56,363 INFO L125 PetriNetUnfolderBase]: For 1327823/1352452 co-relation queries the response was YES. [2023-11-29 03:19:59,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767077 conditions, 145185 events. 92552/145185 cut-off events. For 1327823/1352452 co-relation queries the response was YES. Maximal size of possible extension queue 4338. Compared 1283342 event pairs, 21606 based on Foata normal form. 4205/145311 useless extension candidates. Maximal degree in co-relation 766972. Up to 37681 conditions per place. [2023-11-29 03:19:59,827 INFO L140 encePairwiseOnDemand]: 70/84 looper letters, 531 selfloop transitions, 230 changer transitions 0/785 dead transitions. [2023-11-29 03:19:59,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 785 transitions, 12762 flow [2023-11-29 03:19:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 03:19:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 03:19:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 617 transitions. [2023-11-29 03:19:59,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565018315018315 [2023-11-29 03:19:59,830 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 617 transitions. [2023-11-29 03:19:59,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 617 transitions. [2023-11-29 03:19:59,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:19:59,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 617 transitions. [2023-11-29 03:19:59,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 47.46153846153846) internal successors, (617), 13 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:59,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 84.0) internal successors, (1176), 14 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:59,832 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 84.0) internal successors, (1176), 14 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:59,832 INFO L175 Difference]: Start difference. First operand has 333 places, 518 transitions, 7819 flow. Second operand 13 states and 617 transitions. [2023-11-29 03:19:59,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 785 transitions, 12762 flow [2023-11-29 03:20:15,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 785 transitions, 12491 flow, removed 13 selfloop flow, removed 6 redundant places. [2023-11-29 03:20:15,654 INFO L231 Difference]: Finished difference. Result has 343 places, 582 transitions, 9344 flow [2023-11-29 03:20:15,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=7610, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9344, PETRI_PLACES=343, PETRI_TRANSITIONS=582} [2023-11-29 03:20:15,654 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 260 predicate places. [2023-11-29 03:20:15,655 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 582 transitions, 9344 flow [2023-11-29 03:20:15,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 38.375) internal successors, (614), 16 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:20:15,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:20:15,655 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:20:15,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2023-11-29 03:20:15,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:20:15,856 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-29 03:20:15,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:20:15,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1197184098, now seen corresponding path program 1 times [2023-11-29 03:20:15,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:20:15,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332311517] [2023-11-29 03:20:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:20:15,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 03:20:15,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:20:15,857 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 03:20:15,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0391335c-7a83-4699-9158-d436ce52065c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-11-29 03:20:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:20:16,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 03:20:16,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:20:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 03:20:16,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:20:16,542 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 27 treesize of output 23 [2023-11-29 03:20:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 03:20:16,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:20:16,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332311517] [2023-11-29 03:20:16,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332311517] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:20:16,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:20:16,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-29 03:20:16,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819864889] [2023-11-29 03:20:16,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:20:16,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 03:20:16,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:20:16,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 03:20:16,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:20:20,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 84 [2023-11-29 03:20:20,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 582 transitions, 9344 flow. Second operand has 14 states, 14 states have (on average 44.42857142857143) internal successors, (622), 14 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:20:20,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:20:20,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 84 [2023-11-29 03:20:20,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand