./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:14:42,161 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:14:42,244 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:14:42,251 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:14:42,252 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:14:42,284 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:14:42,285 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:14:42,286 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:14:42,287 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:14:42,288 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:14:42,289 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:14:42,290 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:14:42,290 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:14:42,291 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:14:42,292 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:14:42,293 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:14:42,294 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:14:42,294 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:14:42,295 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:14:42,296 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:14:42,296 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:14:42,297 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:14:42,298 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:14:42,298 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:14:42,299 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:14:42,299 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:14:42,300 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:14:42,301 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:14:42,301 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:14:42,302 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:14:42,303 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:14:42,303 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:14:42,304 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:14:42,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:14:42,305 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:14:42,305 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:14:42,306 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:14:42,307 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:14:42,307 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_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2023-11-06 22:14:42,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:14:42,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:14:42,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:14:42,696 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:14:42,697 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:14:42,699 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2023-11-06 22:14:46,002 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:14:46,238 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:14:46,239 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2023-11-06 22:14:46,257 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/data/ab95406b6/49437d54c551443cb07a67b1e9713987/FLAG22052728c [2023-11-06 22:14:46,281 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/data/ab95406b6/49437d54c551443cb07a67b1e9713987 [2023-11-06 22:14:46,288 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:14:46,290 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:14:46,293 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:14:46,294 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:14:46,299 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:14:46,302 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:14:46" (1/1) ... [2023-11-06 22:14:46,303 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53a5b108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:46, skipping insertion in model container [2023-11-06 22:14:46,303 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:14:46" (1/1) ... [2023-11-06 22:14:46,338 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:14:46,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:14:46,580 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) [2023-11-06 22:14:46,581 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7bf08b3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:46, skipping insertion in model container [2023-11-06 22:14:46,581 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:14:46,581 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 22:14:46,583 INFO L158 Benchmark]: Toolchain (without parser) took 292.34ms. Allocated memory is still 201.3MB. Free memory was 153.0MB in the beginning and 142.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:14:46,584 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 142.6MB. Free memory is still 86.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:14:46,585 INFO L158 Benchmark]: CACSL2BoogieTranslator took 287.79ms. Allocated memory is still 201.3MB. Free memory was 152.4MB in the beginning and 142.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:14:46,587 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 142.6MB. Free memory is still 86.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 287.79ms. Allocated memory is still 201.3MB. Free memory was 152.4MB in the beginning and 142.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 114]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:14:49,203 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:14:49,350 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 22:14:49,363 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:14:49,384 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:14:49,417 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:14:49,418 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:14:49,419 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:14:49,420 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:14:49,421 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:14:49,422 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:14:49,422 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:14:49,423 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:14:49,424 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:14:49,425 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:14:49,426 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:14:49,426 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:14:49,427 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:14:49,428 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:14:49,428 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:14:49,429 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:14:49,430 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:14:49,430 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:14:49,431 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 22:14:49,432 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 22:14:49,432 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:14:49,433 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:14:49,433 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:14:49,434 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:14:49,435 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:14:49,435 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:14:49,436 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:14:49,436 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:14:49,437 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:14:49,438 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 22:14:49,438 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 22:14:49,439 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:14:49,439 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:14:49,440 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:14:49,441 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 22:14:49,441 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:14:49,442 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_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2023-11-06 22:14:49,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:14:49,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:14:49,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:14:49,952 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:14:49,953 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:14:49,955 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2023-11-06 22:14:53,390 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:14:53,699 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:14:53,699 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2023-11-06 22:14:53,713 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/data/6c0c20305/ccbc375304b94003b69ad961e4579251/FLAG356884a22 [2023-11-06 22:14:53,737 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/data/6c0c20305/ccbc375304b94003b69ad961e4579251 [2023-11-06 22:14:53,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:14:53,747 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:14:53,751 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:14:53,751 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:14:53,758 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:14:53,761 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:14:53" (1/1) ... [2023-11-06 22:14:53,763 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2297a1f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:53, skipping insertion in model container [2023-11-06 22:14:53,763 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:14:53" (1/1) ... [2023-11-06 22:14:53,802 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:14:54,110 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:14:54,134 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 22:14:54,146 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:14:54,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:14:54,207 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:14:54,264 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:14:54,304 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:14:54,304 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54 WrapperNode [2023-11-06 22:14:54,304 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:14:54,305 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:14:54,306 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:14:54,306 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:14:54,314 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,328 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,356 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 131 [2023-11-06 22:14:54,357 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:14:54,358 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:14:54,358 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:14:54,358 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:14:54,369 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,370 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,384 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,387 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,406 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,412 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,422 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,431 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,436 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:14:54,445 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:14:54,445 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:14:54,445 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:14:54,446 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:14:54,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:54,487 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:14:54,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:14:54,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:14:54,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 22:14:54,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:14:54,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 22:14:54,534 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:14:54,534 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:14:54,534 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:14:54,534 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:14:54,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:14:54,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:14:54,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:14:54,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:14:54,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 22:14:54,537 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:14:54,682 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:14:54,685 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:14:55,566 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:14:55,577 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:14:55,577 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 22:14:55,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:14:55 BoogieIcfgContainer [2023-11-06 22:14:55,581 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:14:55,584 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:14:55,584 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:14:55,588 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:14:55,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:14:53" (1/3) ... [2023-11-06 22:14:55,589 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50bf28f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:14:55, skipping insertion in model container [2023-11-06 22:14:55,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (2/3) ... [2023-11-06 22:14:55,590 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50bf28f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:14:55, skipping insertion in model container [2023-11-06 22:14:55,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:14:55" (3/3) ... [2023-11-06 22:14:55,591 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2023-11-06 22:14:55,615 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:14:55,616 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-11-06 22:14:55,617 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:14:55,814 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:14:55,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 261 transitions, 536 flow [2023-11-06 22:14:56,015 INFO L124 PetriNetUnfolderBase]: 21/259 cut-off events. [2023-11-06 22:14:56,016 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:14:56,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 259 events. 21/259 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 416 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 169. Up to 3 conditions per place. [2023-11-06 22:14:56,026 INFO L82 GeneralOperation]: Start removeDead. Operand has 247 places, 261 transitions, 536 flow [2023-11-06 22:14:56,035 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 240 places, 254 transitions, 520 flow [2023-11-06 22:14:56,039 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:14:56,050 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 240 places, 254 transitions, 520 flow [2023-11-06 22:14:56,053 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 240 places, 254 transitions, 520 flow [2023-11-06 22:14:56,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 240 places, 254 transitions, 520 flow [2023-11-06 22:14:56,114 INFO L124 PetriNetUnfolderBase]: 21/254 cut-off events. [2023-11-06 22:14:56,114 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:14:56,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 254 events. 21/254 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 412 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 169. Up to 3 conditions per place. [2023-11-06 22:14:56,122 INFO L119 LiptonReduction]: Number of co-enabled transitions 4836 [2023-11-06 22:15:32,421 INFO L134 LiptonReduction]: Checked pairs total: 7910 [2023-11-06 22:15:32,422 INFO L136 LiptonReduction]: Total number of compositions: 298 [2023-11-06 22:15:32,464 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:15:32,474 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;@6f449a9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:15:32,475 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-11-06 22:15:32,521 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:15:32,522 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:15:32,522 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:15:32,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:32,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:15:32,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:15:32,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:32,531 INFO L85 PathProgramCache]: Analyzing trace with hash 32414, now seen corresponding path program 1 times [2023-11-06 22:15:32,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:15:32,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528310642] [2023-11-06 22:15:32,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:32,556 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 [2023-11-06 22:15:32,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:15:32,565 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:15:32,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:15:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:32,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:15:32,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:32,798 INFO L351 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 [2023-11-06 22:15:32,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:32,813 INFO L351 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 [2023-11-06 22:15:32,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:32,831 INFO L351 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 [2023-11-06 22:15:32,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:32,841 INFO L351 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 [2023-11-06 22:15:32,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:32,877 INFO L351 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 [2023-11-06 22:15:32,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:32,893 INFO L351 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 [2023-11-06 22:15:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:32,922 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:15:32,923 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:15:32,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528310642] [2023-11-06 22:15:32,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528310642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:15:32,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:15:32,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:15:32,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684233183] [2023-11-06 22:15:32,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:15:32,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:15:32,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:15:32,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:15:32,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:15:33,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 559 [2023-11-06 22:15:33,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 54 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:33,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:33,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 559 [2023-11-06 22:15:33,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:34,201 INFO L124 PetriNetUnfolderBase]: 901/1392 cut-off events. [2023-11-06 22:15:34,202 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2023-11-06 22:15:34,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2826 conditions, 1392 events. 901/1392 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 6351 event pairs, 679 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 2648. Up to 1388 conditions per place. [2023-11-06 22:15:34,222 INFO L140 encePairwiseOnDemand]: 545/559 looper letters, 50 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2023-11-06 22:15:34,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 57 transitions, 240 flow [2023-11-06 22:15:34,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:15:34,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:15:34,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 757 transitions. [2023-11-06 22:15:34,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4514013118664281 [2023-11-06 22:15:34,253 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 757 transitions. [2023-11-06 22:15:34,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 757 transitions. [2023-11-06 22:15:34,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:34,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 757 transitions. [2023-11-06 22:15:34,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.33333333333334) internal successors, (757), 3 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:34,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:34,284 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:34,287 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 120 flow. Second operand 3 states and 757 transitions. [2023-11-06 22:15:34,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 57 transitions, 240 flow [2023-11-06 22:15:34,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 57 transitions, 232 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:15:34,313 INFO L231 Difference]: Finished difference. Result has 49 places, 55 transitions, 158 flow [2023-11-06 22:15:34,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=49, PETRI_TRANSITIONS=55} [2023-11-06 22:15:34,320 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -5 predicate places. [2023-11-06 22:15:34,320 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 55 transitions, 158 flow [2023-11-06 22:15:34,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:34,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:34,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:15:34,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:15:34,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:15:34,535 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:15:34,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:34,536 INFO L85 PathProgramCache]: Analyzing trace with hash 32413, now seen corresponding path program 1 times [2023-11-06 22:15:34,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:15:34,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740755073] [2023-11-06 22:15:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:34,537 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 [2023-11-06 22:15:34,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:15:34,538 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:15:34,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:15:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:34,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:15:34,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:34,611 INFO L351 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 [2023-11-06 22:15:34,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:34,624 INFO L351 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 [2023-11-06 22:15:34,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:34,633 INFO L351 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 [2023-11-06 22:15:34,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:34,644 INFO L351 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 [2023-11-06 22:15:34,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:34,659 INFO L351 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 [2023-11-06 22:15:34,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:34,679 INFO L351 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 [2023-11-06 22:15:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:34,685 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:15:34,686 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:15:34,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740755073] [2023-11-06 22:15:34,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740755073] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:15:34,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:15:34,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:15:34,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199789594] [2023-11-06 22:15:34,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:15:34,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:15:34,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:15:34,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:15:34,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:15:34,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 559 [2023-11-06 22:15:34,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 55 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:34,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:34,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 559 [2023-11-06 22:15:34,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:35,596 INFO L124 PetriNetUnfolderBase]: 901/1388 cut-off events. [2023-11-06 22:15:35,597 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:15:35,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2817 conditions, 1388 events. 901/1388 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 6337 event pairs, 679 based on Foata normal form. 4/434 useless extension candidates. Maximal degree in co-relation 2761. Up to 1380 conditions per place. [2023-11-06 22:15:35,610 INFO L140 encePairwiseOnDemand]: 553/559 looper letters, 46 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2023-11-06 22:15:35,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 53 transitions, 260 flow [2023-11-06 22:15:35,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:15:35,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:15:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 748 transitions. [2023-11-06 22:15:35,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460345855694693 [2023-11-06 22:15:35,616 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 748 transitions. [2023-11-06 22:15:35,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 748 transitions. [2023-11-06 22:15:35,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:35,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 748 transitions. [2023-11-06 22:15:35,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:35,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:35,628 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:35,629 INFO L175 Difference]: Start difference. First operand has 49 places, 55 transitions, 158 flow. Second operand 3 states and 748 transitions. [2023-11-06 22:15:35,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 53 transitions, 260 flow [2023-11-06 22:15:35,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 53 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:15:35,633 INFO L231 Difference]: Finished difference. Result has 47 places, 53 transitions, 154 flow [2023-11-06 22:15:35,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=53} [2023-11-06 22:15:35,634 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -7 predicate places. [2023-11-06 22:15:35,634 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 53 transitions, 154 flow [2023-11-06 22:15:35,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:35,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:35,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:15:35,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:35,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:15:35,849 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:15:35,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:35,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1007178, now seen corresponding path program 1 times [2023-11-06 22:15:35,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:15:35,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129357914] [2023-11-06 22:15:35,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:35,851 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 [2023-11-06 22:15:35,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:15:35,853 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:15:35,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:15:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:35,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:15:35,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:35,977 INFO L351 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 [2023-11-06 22:15:35,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:35,998 INFO L351 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 [2023-11-06 22:15:36,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:36,016 INFO L351 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 [2023-11-06 22:15:36,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:36,026 INFO L351 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 [2023-11-06 22:15:36,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:36,039 INFO L351 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 [2023-11-06 22:15:36,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:36,054 INFO L351 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 [2023-11-06 22:15:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:36,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:36,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:15:36,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129357914] [2023-11-06 22:15:36,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129357914] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:36,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:15:36,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 22:15:36,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115010536] [2023-11-06 22:15:36,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:36,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:15:36,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:15:36,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:15:36,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:15:38,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 559 [2023-11-06 22:15:38,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 53 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:38,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:38,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 559 [2023-11-06 22:15:38,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:40,800 INFO L124 PetriNetUnfolderBase]: 913/1406 cut-off events. [2023-11-06 22:15:40,800 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:15:40,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2880 conditions, 1406 events. 913/1406 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 6404 event pairs, 679 based on Foata normal form. 0/439 useless extension candidates. Maximal degree in co-relation 2761. Up to 1395 conditions per place. [2023-11-06 22:15:40,811 INFO L140 encePairwiseOnDemand]: 550/559 looper letters, 46 selfloop transitions, 25 changer transitions 0/71 dead transitions. [2023-11-06 22:15:40,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 386 flow [2023-11-06 22:15:40,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:15:40,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:15:40,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1403 transitions. [2023-11-06 22:15:40,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4183064997018485 [2023-11-06 22:15:40,818 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1403 transitions. [2023-11-06 22:15:40,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1403 transitions. [2023-11-06 22:15:40,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:40,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1403 transitions. [2023-11-06 22:15:40,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 233.83333333333334) internal successors, (1403), 6 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:40,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:40,835 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:40,835 INFO L175 Difference]: Start difference. First operand has 47 places, 53 transitions, 154 flow. Second operand 6 states and 1403 transitions. [2023-11-06 22:15:40,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 386 flow [2023-11-06 22:15:40,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 354 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:15:40,839 INFO L231 Difference]: Finished difference. Result has 53 places, 71 transitions, 308 flow [2023-11-06 22:15:40,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=53, PETRI_TRANSITIONS=71} [2023-11-06 22:15:40,840 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2023-11-06 22:15:40,840 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 71 transitions, 308 flow [2023-11-06 22:15:40,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:40,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:40,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:15:40,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:41,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:15:41,046 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:15:41,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:41,046 INFO L85 PathProgramCache]: Analyzing trace with hash 31278679, now seen corresponding path program 1 times [2023-11-06 22:15:41,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:15:41,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476692875] [2023-11-06 22:15:41,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:41,047 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 [2023-11-06 22:15:41,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:15:41,048 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:15:41,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:15:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:41,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:15:41,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:41,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:41,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:41,191 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-11-06 22:15:41,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:41,242 INFO L322 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-06 22:15:41,243 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-06 22:15:41,302 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:15:41,302 INFO L351 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 [2023-11-06 22:15:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:15:41,333 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:15:41,333 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:15:41,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476692875] [2023-11-06 22:15:41,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476692875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:15:41,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:15:41,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:15:41,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295215033] [2023-11-06 22:15:41,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:15:41,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:15:41,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:15:41,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:15:41,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:15:41,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 559 [2023-11-06 22:15:41,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 71 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:41,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:41,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 559 [2023-11-06 22:15:41,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:42,133 INFO L124 PetriNetUnfolderBase]: 685/1079 cut-off events. [2023-11-06 22:15:42,133 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:15:42,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2254 conditions, 1079 events. 685/1079 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 4794 event pairs, 504 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 2180. Up to 1079 conditions per place. [2023-11-06 22:15:42,142 INFO L140 encePairwiseOnDemand]: 556/559 looper letters, 64 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-11-06 22:15:42,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 65 transitions, 403 flow [2023-11-06 22:15:42,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:15:42,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:15:42,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 758 transitions. [2023-11-06 22:15:42,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45199761478831246 [2023-11-06 22:15:42,147 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 758 transitions. [2023-11-06 22:15:42,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 758 transitions. [2023-11-06 22:15:42,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:42,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 758 transitions. [2023-11-06 22:15:42,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:42,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:42,156 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:42,156 INFO L175 Difference]: Start difference. First operand has 53 places, 71 transitions, 308 flow. Second operand 3 states and 758 transitions. [2023-11-06 22:15:42,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 65 transitions, 403 flow [2023-11-06 22:15:42,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 65 transitions, 370 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-11-06 22:15:42,161 INFO L231 Difference]: Finished difference. Result has 52 places, 65 transitions, 242 flow [2023-11-06 22:15:42,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=52, PETRI_TRANSITIONS=65} [2023-11-06 22:15:42,163 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2023-11-06 22:15:42,163 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 65 transitions, 242 flow [2023-11-06 22:15:42,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:42,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:42,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:15:42,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:42,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:15:42,375 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:15:42,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:42,376 INFO L85 PathProgramCache]: Analyzing trace with hash 31278680, now seen corresponding path program 1 times [2023-11-06 22:15:42,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:15:42,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558804925] [2023-11-06 22:15:42,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:42,376 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 [2023-11-06 22:15:42,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:15:42,378 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:15:42,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:15:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:42,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:15:42,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:42,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:42,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:42,554 INFO L351 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 [2023-11-06 22:15:42,568 INFO L351 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 [2023-11-06 22:15:42,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:42,599 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:15:42,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:42,620 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-06 22:15:42,719 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 22:15:42,724 INFO L351 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 [2023-11-06 22:15:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:42,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:43,335 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:15:43,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558804925] [2023-11-06 22:15:43,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558804925] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:43,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:15:43,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-06 22:15:43,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001644161] [2023-11-06 22:15:43,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:43,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:15:43,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:15:43,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:15:43,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:15:45,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 559 [2023-11-06 22:15:45,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 65 transitions, 242 flow. Second operand has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:45,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:45,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 559 [2023-11-06 22:15:45,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:47,755 INFO L124 PetriNetUnfolderBase]: 903/1482 cut-off events. [2023-11-06 22:15:47,755 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-06 22:15:47,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3052 conditions, 1482 events. 903/1482 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 7333 event pairs, 658 based on Foata normal form. 0/614 useless extension candidates. Maximal degree in co-relation 3040. Up to 737 conditions per place. [2023-11-06 22:15:47,766 INFO L140 encePairwiseOnDemand]: 552/559 looper letters, 83 selfloop transitions, 13 changer transitions 0/96 dead transitions. [2023-11-06 22:15:47,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 96 transitions, 487 flow [2023-11-06 22:15:47,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:15:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:15:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1836 transitions. [2023-11-06 22:15:47,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41055456171735244 [2023-11-06 22:15:47,776 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1836 transitions. [2023-11-06 22:15:47,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1836 transitions. [2023-11-06 22:15:47,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:47,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1836 transitions. [2023-11-06 22:15:47,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 229.5) internal successors, (1836), 8 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:47,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 559.0) internal successors, (5031), 9 states have internal predecessors, (5031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:47,794 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 559.0) internal successors, (5031), 9 states have internal predecessors, (5031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:47,794 INFO L175 Difference]: Start difference. First operand has 52 places, 65 transitions, 242 flow. Second operand 8 states and 1836 transitions. [2023-11-06 22:15:47,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 96 transitions, 487 flow [2023-11-06 22:15:47,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 96 transitions, 486 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:15:47,798 INFO L231 Difference]: Finished difference. Result has 57 places, 60 transitions, 244 flow [2023-11-06 22:15:47,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=244, PETRI_PLACES=57, PETRI_TRANSITIONS=60} [2023-11-06 22:15:47,799 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-11-06 22:15:47,799 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 60 transitions, 244 flow [2023-11-06 22:15:47,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:47,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:47,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:15:47,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:48,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:15:48,012 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:15:48,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:48,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1008978, now seen corresponding path program 1 times [2023-11-06 22:15:48,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:15:48,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696063802] [2023-11-06 22:15:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:48,013 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 [2023-11-06 22:15:48,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:15:48,014 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:15:48,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:15:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:48,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:15:48,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:48,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:48,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:48,132 INFO L351 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 [2023-11-06 22:15:48,147 INFO L351 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 [2023-11-06 22:15:48,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:48,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:48,171 INFO L351 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 [2023-11-06 22:15:48,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:48,222 INFO L351 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 [2023-11-06 22:15:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:48,254 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:15:48,255 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:15:48,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696063802] [2023-11-06 22:15:48,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696063802] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:15:48,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:15:48,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:15:48,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440854924] [2023-11-06 22:15:48,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:15:48,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:15:48,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:15:48,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:15:48,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:15:48,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 559 [2023-11-06 22:15:48,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 60 transitions, 244 flow. Second operand has 4 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:48,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:48,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 559 [2023-11-06 22:15:48,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:49,318 INFO L124 PetriNetUnfolderBase]: 903/1481 cut-off events. [2023-11-06 22:15:49,318 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-06 22:15:49,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3060 conditions, 1481 events. 903/1481 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7141 event pairs, 658 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 3047. Up to 1481 conditions per place. [2023-11-06 22:15:49,329 INFO L140 encePairwiseOnDemand]: 557/559 looper letters, 58 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-11-06 22:15:49,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 59 transitions, 355 flow [2023-11-06 22:15:49,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:15:49,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:15:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 755 transitions. [2023-11-06 22:15:49,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4502087060226595 [2023-11-06 22:15:49,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 755 transitions. [2023-11-06 22:15:49,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 755 transitions. [2023-11-06 22:15:49,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:49,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 755 transitions. [2023-11-06 22:15:49,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:49,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:49,344 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:49,344 INFO L175 Difference]: Start difference. First operand has 57 places, 60 transitions, 244 flow. Second operand 3 states and 755 transitions. [2023-11-06 22:15:49,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 59 transitions, 355 flow [2023-11-06 22:15:49,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 59 transitions, 330 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-06 22:15:49,349 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 214 flow [2023-11-06 22:15:49,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-11-06 22:15:49,353 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2023-11-06 22:15:49,354 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 214 flow [2023-11-06 22:15:49,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:49,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:49,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:15:49,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:49,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:15:49,566 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:15:49,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:49,566 INFO L85 PathProgramCache]: Analyzing trace with hash 969648189, now seen corresponding path program 1 times [2023-11-06 22:15:49,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:15:49,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066021511] [2023-11-06 22:15:49,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:49,567 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 [2023-11-06 22:15:49,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:15:49,569 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:15:49,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:15:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:49,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:15:49,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:49,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:49,702 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:15:49,708 INFO L351 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 [2023-11-06 22:15:49,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:49,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:49,727 INFO L351 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 [2023-11-06 22:15:49,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:49,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:49,755 INFO L351 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 [2023-11-06 22:15:49,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:49,796 INFO L351 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 [2023-11-06 22:15:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:49,866 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:15:49,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:15:49,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066021511] [2023-11-06 22:15:49,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066021511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:15:49,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:15:49,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:15:49,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904931371] [2023-11-06 22:15:49,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:15:49,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:15:49,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:15:49,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:15:49,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:15:50,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 559 [2023-11-06 22:15:50,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 214 flow. Second operand has 4 states, 4 states have (on average 236.25) internal successors, (945), 4 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:50,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:50,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 559 [2023-11-06 22:15:50,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:50,897 INFO L124 PetriNetUnfolderBase]: 855/1391 cut-off events. [2023-11-06 22:15:50,898 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:15:50,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2869 conditions, 1391 events. 855/1391 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 6690 event pairs, 620 based on Foata normal form. 0/601 useless extension candidates. Maximal degree in co-relation 2856. Up to 1391 conditions per place. [2023-11-06 22:15:50,909 INFO L140 encePairwiseOnDemand]: 556/559 looper letters, 56 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-11-06 22:15:50,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 57 transitions, 324 flow [2023-11-06 22:15:50,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:15:50,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:15:50,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 748 transitions. [2023-11-06 22:15:50,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460345855694693 [2023-11-06 22:15:50,914 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 748 transitions. [2023-11-06 22:15:50,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 748 transitions. [2023-11-06 22:15:50,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:50,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 748 transitions. [2023-11-06 22:15:50,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:50,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:50,922 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:50,922 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 214 flow. Second operand 3 states and 748 transitions. [2023-11-06 22:15:50,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 57 transitions, 324 flow [2023-11-06 22:15:50,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 323 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:15:50,925 INFO L231 Difference]: Finished difference. Result has 54 places, 57 transitions, 211 flow [2023-11-06 22:15:50,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=54, PETRI_TRANSITIONS=57} [2023-11-06 22:15:50,926 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2023-11-06 22:15:50,926 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 57 transitions, 211 flow [2023-11-06 22:15:50,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 236.25) internal successors, (945), 4 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:50,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:50,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:15:50,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:51,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:15:51,148 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:15:51,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:51,149 INFO L85 PathProgramCache]: Analyzing trace with hash 969648188, now seen corresponding path program 1 times [2023-11-06 22:15:51,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:15:51,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354035459] [2023-11-06 22:15:51,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:51,150 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 [2023-11-06 22:15:51,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:15:51,152 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:15:51,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:15:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:51,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:15:51,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:51,276 INFO L322 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-06 22:15:51,277 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-06 22:15:51,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:51,291 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:15:51,292 INFO L351 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 [2023-11-06 22:15:51,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:51,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:51,331 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:15:51,332 INFO L351 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 [2023-11-06 22:15:51,360 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:15:51,364 INFO L351 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 [2023-11-06 22:15:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:51,381 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:15:51,381 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:15:51,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354035459] [2023-11-06 22:15:51,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354035459] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:15:51,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:15:51,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:15:51,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011844588] [2023-11-06 22:15:51,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:15:51,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:15:51,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:15:51,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:15:51,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:15:51,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 559 [2023-11-06 22:15:51,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 57 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:51,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:51,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 559 [2023-11-06 22:15:51,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:51,934 INFO L124 PetriNetUnfolderBase]: 807/1301 cut-off events. [2023-11-06 22:15:51,935 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:15:51,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2690 conditions, 1301 events. 807/1301 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 6121 event pairs, 582 based on Foata normal form. 0/587 useless extension candidates. Maximal degree in co-relation 2676. Up to 1301 conditions per place. [2023-11-06 22:15:51,945 INFO L140 encePairwiseOnDemand]: 556/559 looper letters, 54 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-11-06 22:15:51,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 55 transitions, 317 flow [2023-11-06 22:15:51,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:15:51,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:15:51,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 746 transitions. [2023-11-06 22:15:51,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44484197972570066 [2023-11-06 22:15:51,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 746 transitions. [2023-11-06 22:15:51,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 746 transitions. [2023-11-06 22:15:51,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:51,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 746 transitions. [2023-11-06 22:15:51,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:51,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:51,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:51,958 INFO L175 Difference]: Start difference. First operand has 54 places, 57 transitions, 211 flow. Second operand 3 states and 746 transitions. [2023-11-06 22:15:51,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 55 transitions, 317 flow [2023-11-06 22:15:51,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 55 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:15:51,961 INFO L231 Difference]: Finished difference. Result has 53 places, 55 transitions, 208 flow [2023-11-06 22:15:51,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=53, PETRI_TRANSITIONS=55} [2023-11-06 22:15:51,962 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2023-11-06 22:15:51,962 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 55 transitions, 208 flow [2023-11-06 22:15:51,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:51,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:51,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:15:51,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:15:52,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:15:52,175 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:15:52,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:52,175 INFO L85 PathProgramCache]: Analyzing trace with hash -5678241, now seen corresponding path program 1 times [2023-11-06 22:15:52,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:15:52,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120773065] [2023-11-06 22:15:52,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:52,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:15:52,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:15:52,177 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:15:52,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:15:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:52,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:15:52,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:52,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:15:52,336 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:15:52,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120773065] [2023-11-06 22:15:52,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120773065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:15:52,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:15:52,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:15:52,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984799613] [2023-11-06 22:15:52,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:15:52,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:15:52,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:15:52,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:15:52,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:15:52,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 559 [2023-11-06 22:15:52,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 55 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 228.2) internal successors, (1141), 5 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:52,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:52,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 559 [2023-11-06 22:15:52,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:53,452 INFO L124 PetriNetUnfolderBase]: 994/1624 cut-off events. [2023-11-06 22:15:53,453 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-06 22:15:53,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3370 conditions, 1624 events. 994/1624 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 8036 event pairs, 660 based on Foata normal form. 0/780 useless extension candidates. Maximal degree in co-relation 3355. Up to 1300 conditions per place. [2023-11-06 22:15:53,465 INFO L140 encePairwiseOnDemand]: 549/559 looper letters, 91 selfloop transitions, 5 changer transitions 0/96 dead transitions. [2023-11-06 22:15:53,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 96 transitions, 529 flow [2023-11-06 22:15:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:15:53,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:15:53,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1214 transitions. [2023-11-06 22:15:53,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434704830053666 [2023-11-06 22:15:53,472 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1214 transitions. [2023-11-06 22:15:53,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1214 transitions. [2023-11-06 22:15:53,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:53,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1214 transitions. [2023-11-06 22:15:53,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 242.8) internal successors, (1214), 5 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:53,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 559.0) internal successors, (3354), 6 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:53,482 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 559.0) internal successors, (3354), 6 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:53,483 INFO L175 Difference]: Start difference. First operand has 53 places, 55 transitions, 208 flow. Second operand 5 states and 1214 transitions. [2023-11-06 22:15:53,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 96 transitions, 529 flow [2023-11-06 22:15:53,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 96 transitions, 528 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:15:53,486 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 240 flow [2023-11-06 22:15:53,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2023-11-06 22:15:53,487 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 4 predicate places. [2023-11-06 22:15:53,487 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 240 flow [2023-11-06 22:15:53,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 228.2) internal successors, (1141), 5 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:53,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:53,488 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 22:15:53,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:15:53,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:15:53,699 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:15:53,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:53,700 INFO L85 PathProgramCache]: Analyzing trace with hash -57603682, now seen corresponding path program 2 times [2023-11-06 22:15:53,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:15:53,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020497028] [2023-11-06 22:15:53,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:15:53,701 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 [2023-11-06 22:15:53,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:15:53,702 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:15:53,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:15:53,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:15:53,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:15:53,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:15:53,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:53,830 INFO L351 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 [2023-11-06 22:15:53,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:53,845 INFO L351 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 [2023-11-06 22:15:53,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:53,858 INFO L351 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 [2023-11-06 22:15:53,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:53,865 INFO L351 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 [2023-11-06 22:15:53,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:53,882 INFO L351 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 [2023-11-06 22:15:53,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:53,900 INFO L351 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 [2023-11-06 22:15:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:54,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:54,828 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:15:54,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020497028] [2023-11-06 22:15:54,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020497028] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:54,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:15:54,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:15:54,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128078121] [2023-11-06 22:15:54,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:54,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:15:54,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:15:54,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:15:54,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:16:02,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 559 [2023-11-06 22:16:02,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 240 flow. Second operand has 12 states, 12 states have (on average 224.0) internal successors, (2688), 12 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:02,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:02,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 559 [2023-11-06 22:16:02,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:07,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:16:09,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:16:10,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:16:12,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:16:13,922 INFO L124 PetriNetUnfolderBase]: 1006/1648 cut-off events. [2023-11-06 22:16:13,923 INFO L125 PetriNetUnfolderBase]: For 307/307 co-relation queries the response was YES. [2023-11-06 22:16:13,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3817 conditions, 1648 events. 1006/1648 cut-off events. For 307/307 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 8172 event pairs, 702 based on Foata normal form. 12/874 useless extension candidates. Maximal degree in co-relation 3799. Up to 1616 conditions per place. [2023-11-06 22:16:13,961 INFO L140 encePairwiseOnDemand]: 552/559 looper letters, 40 selfloop transitions, 35 changer transitions 0/75 dead transitions. [2023-11-06 22:16:13,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 75 transitions, 498 flow [2023-11-06 22:16:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:16:13,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:16:13,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2758 transitions. [2023-11-06 22:16:13,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111508646392367 [2023-11-06 22:16:13,973 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2758 transitions. [2023-11-06 22:16:13,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2758 transitions. [2023-11-06 22:16:13,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:13,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2758 transitions. [2023-11-06 22:16:13,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 229.83333333333334) internal successors, (2758), 12 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:13,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 559.0) internal successors, (7267), 13 states have internal predecessors, (7267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:13,999 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 559.0) internal successors, (7267), 13 states have internal predecessors, (7267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:13,999 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 240 flow. Second operand 12 states and 2758 transitions. [2023-11-06 22:16:13,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 75 transitions, 498 flow [2023-11-06 22:16:14,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 493 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:16:14,003 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 464 flow [2023-11-06 22:16:14,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=464, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2023-11-06 22:16:14,005 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 19 predicate places. [2023-11-06 22:16:14,005 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 464 flow [2023-11-06 22:16:14,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 224.0) internal successors, (2688), 12 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:14,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:14,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:14,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:14,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:16:14,219 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:16:14,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:14,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1733786357, now seen corresponding path program 1 times [2023-11-06 22:16:14,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:16:14,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449209946] [2023-11-06 22:16:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:14,220 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 [2023-11-06 22:16:14,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:16:14,222 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:16:14,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:16:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:14,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:16:14,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:16:14,434 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:16:14,434 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:16:14,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449209946] [2023-11-06 22:16:14,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449209946] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:14,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:14,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:16:14,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026149438] [2023-11-06 22:16:14,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:14,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:16:14,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:16:14,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:16:14,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:16:14,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 559 [2023-11-06 22:16:14,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 464 flow. Second operand has 5 states, 5 states have (on average 228.4) internal successors, (1142), 5 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:14,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:14,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 559 [2023-11-06 22:16:14,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:15,734 INFO L124 PetriNetUnfolderBase]: 1188/1960 cut-off events. [2023-11-06 22:16:15,735 INFO L125 PetriNetUnfolderBase]: For 383/383 co-relation queries the response was YES. [2023-11-06 22:16:15,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4639 conditions, 1960 events. 1188/1960 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10130 event pairs, 780 based on Foata normal form. 0/1084 useless extension candidates. Maximal degree in co-relation 4615. Up to 1636 conditions per place. [2023-11-06 22:16:15,748 INFO L140 encePairwiseOnDemand]: 549/559 looper letters, 90 selfloop transitions, 17 changer transitions 0/107 dead transitions. [2023-11-06 22:16:15,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 107 transitions, 759 flow [2023-11-06 22:16:15,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:16:15,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:16:15,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1211 transitions. [2023-11-06 22:16:15,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4332737030411449 [2023-11-06 22:16:15,753 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1211 transitions. [2023-11-06 22:16:15,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1211 transitions. [2023-11-06 22:16:15,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:15,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1211 transitions. [2023-11-06 22:16:15,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 242.2) internal successors, (1211), 5 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:15,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 559.0) internal successors, (3354), 6 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:15,764 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 559.0) internal successors, (3354), 6 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:15,764 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 464 flow. Second operand 5 states and 1211 transitions. [2023-11-06 22:16:15,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 107 transitions, 759 flow [2023-11-06 22:16:15,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 107 transitions, 653 flow, removed 30 selfloop flow, removed 5 redundant places. [2023-11-06 22:16:15,770 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 439 flow [2023-11-06 22:16:15,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=439, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2023-11-06 22:16:15,771 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2023-11-06 22:16:15,772 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 439 flow [2023-11-06 22:16:15,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 228.4) internal successors, (1142), 5 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:15,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:15,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:15,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:15,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:16:15,984 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:16:15,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:15,985 INFO L85 PathProgramCache]: Analyzing trace with hash 2079105133, now seen corresponding path program 1 times [2023-11-06 22:16:15,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:16:15,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811777620] [2023-11-06 22:16:15,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:15,985 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 [2023-11-06 22:16:15,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:16:15,986 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:16:15,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:16:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:16,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:16:16,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:16,221 INFO L351 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 [2023-11-06 22:16:16,232 INFO L351 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 [2023-11-06 22:16:16,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:16:16,254 INFO L351 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 [2023-11-06 22:16:16,265 INFO L351 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 [2023-11-06 22:16:16,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:16:16,277 INFO L351 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 [2023-11-06 22:16:16,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:16:16,291 INFO L351 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 [2023-11-06 22:16:16,301 INFO L351 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 [2023-11-06 22:16:16,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:16:16,313 INFO L351 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 [2023-11-06 22:16:16,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:16:16,326 INFO L351 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 [2023-11-06 22:16:16,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:16:16,426 INFO L351 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 [2023-11-06 22:16:16,438 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:16:16,438 INFO L351 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 [2023-11-06 22:16:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:16:16,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:16:17,148 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:16:17,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811777620] [2023-11-06 22:16:17,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811777620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:17,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:17,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:16:17,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609156129] [2023-11-06 22:16:17,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:17,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:16:17,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:16:17,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:16:17,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:16:26,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 559 [2023-11-06 22:16:26,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 439 flow. Second operand has 10 states, 10 states have (on average 209.6) internal successors, (2096), 10 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:26,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:26,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 559 [2023-11-06 22:16:26,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:31,862 INFO L124 PetriNetUnfolderBase]: 3588/5760 cut-off events. [2023-11-06 22:16:31,862 INFO L125 PetriNetUnfolderBase]: For 1654/1654 co-relation queries the response was YES. [2023-11-06 22:16:31,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14495 conditions, 5760 events. 3588/5760 cut-off events. For 1654/1654 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 35115 event pairs, 930 based on Foata normal form. 0/2920 useless extension candidates. Maximal degree in co-relation 14470. Up to 1199 conditions per place. [2023-11-06 22:16:31,909 INFO L140 encePairwiseOnDemand]: 543/559 looper letters, 171 selfloop transitions, 68 changer transitions 0/239 dead transitions. [2023-11-06 22:16:31,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 239 transitions, 1517 flow [2023-11-06 22:16:31,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:16:31,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:16:31,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4365 transitions. [2023-11-06 22:16:31,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904293381037567 [2023-11-06 22:16:31,931 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4365 transitions. [2023-11-06 22:16:31,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4365 transitions. [2023-11-06 22:16:31,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:31,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4365 transitions. [2023-11-06 22:16:31,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 218.25) internal successors, (4365), 20 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:31,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 559.0) internal successors, (11739), 21 states have internal predecessors, (11739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:31,965 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 559.0) internal successors, (11739), 21 states have internal predecessors, (11739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:31,965 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 439 flow. Second operand 20 states and 4365 transitions. [2023-11-06 22:16:31,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 239 transitions, 1517 flow [2023-11-06 22:16:31,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 239 transitions, 1486 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:16:31,987 INFO L231 Difference]: Finished difference. Result has 92 places, 122 transitions, 851 flow [2023-11-06 22:16:31,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=851, PETRI_PLACES=92, PETRI_TRANSITIONS=122} [2023-11-06 22:16:31,988 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 38 predicate places. [2023-11-06 22:16:31,988 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 122 transitions, 851 flow [2023-11-06 22:16:31,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 209.6) internal successors, (2096), 10 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:31,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:31,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:32,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:32,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:16:32,201 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:16:32,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:32,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2079105184, now seen corresponding path program 1 times [2023-11-06 22:16:32,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:16:32,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539543833] [2023-11-06 22:16:32,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:32,202 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 [2023-11-06 22:16:32,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:16:32,204 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:16:32,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:16:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:32,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:16:32,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:16:32,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:32,625 INFO L351 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 [2023-11-06 22:16:32,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:16:32,721 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:16:32,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539543833] [2023-11-06 22:16:32,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539543833] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:32,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:32,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-06 22:16:32,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592083910] [2023-11-06 22:16:32,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:32,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:16:32,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:16:32,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:16:32,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:16:36,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 559 [2023-11-06 22:16:36,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 122 transitions, 851 flow. Second operand has 10 states, 10 states have (on average 219.4) internal successors, (2194), 10 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:36,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:36,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 559 [2023-11-06 22:16:36,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:39,734 INFO L124 PetriNetUnfolderBase]: 4120/6612 cut-off events. [2023-11-06 22:16:39,734 INFO L125 PetriNetUnfolderBase]: For 3964/3964 co-relation queries the response was YES. [2023-11-06 22:16:39,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18370 conditions, 6612 events. 4120/6612 cut-off events. For 3964/3964 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 40189 event pairs, 1308 based on Foata normal form. 0/3916 useless extension candidates. Maximal degree in co-relation 18342. Up to 2808 conditions per place. [2023-11-06 22:16:39,785 INFO L140 encePairwiseOnDemand]: 546/559 looper letters, 117 selfloop transitions, 54 changer transitions 0/171 dead transitions. [2023-11-06 22:16:39,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 171 transitions, 1327 flow [2023-11-06 22:16:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:16:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:16:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1844 transitions. [2023-11-06 22:16:39,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41234347048300535 [2023-11-06 22:16:39,794 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1844 transitions. [2023-11-06 22:16:39,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1844 transitions. [2023-11-06 22:16:39,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:39,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1844 transitions. [2023-11-06 22:16:39,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 230.5) internal successors, (1844), 8 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:39,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 559.0) internal successors, (5031), 9 states have internal predecessors, (5031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:39,808 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 559.0) internal successors, (5031), 9 states have internal predecessors, (5031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:39,808 INFO L175 Difference]: Start difference. First operand has 92 places, 122 transitions, 851 flow. Second operand 8 states and 1844 transitions. [2023-11-06 22:16:39,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 171 transitions, 1327 flow [2023-11-06 22:16:39,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 171 transitions, 1243 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-11-06 22:16:39,836 INFO L231 Difference]: Finished difference. Result has 96 places, 126 transitions, 947 flow [2023-11-06 22:16:39,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=947, PETRI_PLACES=96, PETRI_TRANSITIONS=126} [2023-11-06 22:16:39,837 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 42 predicate places. [2023-11-06 22:16:39,838 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 126 transitions, 947 flow [2023-11-06 22:16:39,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 219.4) internal successors, (2194), 10 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:39,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:39,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:39,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:40,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:16:40,051 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:16:40,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:40,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1160113771, now seen corresponding path program 1 times [2023-11-06 22:16:40,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:16:40,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341521852] [2023-11-06 22:16:40,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:40,053 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 [2023-11-06 22:16:40,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:16:40,054 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:16:40,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:16:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:40,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:16:40,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:40,214 INFO L351 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 [2023-11-06 22:16:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:40,237 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:16:40,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:16:40,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341521852] [2023-11-06 22:16:40,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341521852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:40,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:40,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:16:40,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832546524] [2023-11-06 22:16:40,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:40,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:16:40,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:16:40,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:16:40,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:16:40,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 559 [2023-11-06 22:16:40,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 126 transitions, 947 flow. Second operand has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:40,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:40,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 559 [2023-11-06 22:16:40,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:41,593 INFO L124 PetriNetUnfolderBase]: 3100/4952 cut-off events. [2023-11-06 22:16:41,593 INFO L125 PetriNetUnfolderBase]: For 5294/5294 co-relation queries the response was YES. [2023-11-06 22:16:41,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15391 conditions, 4952 events. 3100/4952 cut-off events. For 5294/5294 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28057 event pairs, 2052 based on Foata normal form. 0/3448 useless extension candidates. Maximal degree in co-relation 15362. Up to 4892 conditions per place. [2023-11-06 22:16:41,635 INFO L140 encePairwiseOnDemand]: 554/559 looper letters, 102 selfloop transitions, 17 changer transitions 0/119 dead transitions. [2023-11-06 22:16:41,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 119 transitions, 1140 flow [2023-11-06 22:16:41,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:16:41,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:16:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 929 transitions. [2023-11-06 22:16:41,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415474060822898 [2023-11-06 22:16:41,640 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 929 transitions. [2023-11-06 22:16:41,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 929 transitions. [2023-11-06 22:16:41,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:41,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 929 transitions. [2023-11-06 22:16:41,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.25) internal successors, (929), 4 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:41,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 559.0) internal successors, (2795), 5 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:41,651 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 559.0) internal successors, (2795), 5 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:41,651 INFO L175 Difference]: Start difference. First operand has 96 places, 126 transitions, 947 flow. Second operand 4 states and 929 transitions. [2023-11-06 22:16:41,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 119 transitions, 1140 flow [2023-11-06 22:16:41,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 119 transitions, 1087 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-06 22:16:41,675 INFO L231 Difference]: Finished difference. Result has 92 places, 119 transitions, 883 flow [2023-11-06 22:16:41,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=883, PETRI_PLACES=92, PETRI_TRANSITIONS=119} [2023-11-06 22:16:41,677 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 38 predicate places. [2023-11-06 22:16:41,677 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 119 transitions, 883 flow [2023-11-06 22:16:41,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:41,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:41,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:41,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:41,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:16:41,889 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:16:41,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:41,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1160113631, now seen corresponding path program 1 times [2023-11-06 22:16:41,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:16:41,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927805025] [2023-11-06 22:16:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:41,890 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 [2023-11-06 22:16:41,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:16:41,893 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:16:41,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:16:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:42,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:16:42,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:42,096 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:16:42,096 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:16:42,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927805025] [2023-11-06 22:16:42,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927805025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:42,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:42,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:16:42,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11636084] [2023-11-06 22:16:42,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:42,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:16:42,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:16:42,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:16:42,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:16:42,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 559 [2023-11-06 22:16:42,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 119 transitions, 883 flow. Second operand has 5 states, 5 states have (on average 228.6) internal successors, (1143), 5 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) [2023-11-06 22:16:42,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:42,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 559 [2023-11-06 22:16:42,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:43,469 INFO L124 PetriNetUnfolderBase]: 2977/4757 cut-off events. [2023-11-06 22:16:43,469 INFO L125 PetriNetUnfolderBase]: For 5269/5269 co-relation queries the response was YES. [2023-11-06 22:16:43,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14695 conditions, 4757 events. 2977/4757 cut-off events. For 5269/5269 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 26681 event pairs, 1944 based on Foata normal form. 0/3349 useless extension candidates. Maximal degree in co-relation 14667. Up to 4523 conditions per place. [2023-11-06 22:16:43,547 INFO L140 encePairwiseOnDemand]: 550/559 looper letters, 151 selfloop transitions, 5 changer transitions 0/156 dead transitions. [2023-11-06 22:16:43,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 156 transitions, 1413 flow [2023-11-06 22:16:43,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:16:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:16:43,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1198 transitions. [2023-11-06 22:16:43,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4286225402504472 [2023-11-06 22:16:43,553 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1198 transitions. [2023-11-06 22:16:43,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1198 transitions. [2023-11-06 22:16:43,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:43,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1198 transitions. [2023-11-06 22:16:43,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 239.6) internal successors, (1198), 5 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:43,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 559.0) internal successors, (3354), 6 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:43,566 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 559.0) internal successors, (3354), 6 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:43,566 INFO L175 Difference]: Start difference. First operand has 92 places, 119 transitions, 883 flow. Second operand 5 states and 1198 transitions. [2023-11-06 22:16:43,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 156 transitions, 1413 flow [2023-11-06 22:16:43,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 156 transitions, 1387 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:16:43,590 INFO L231 Difference]: Finished difference. Result has 96 places, 121 transitions, 896 flow [2023-11-06 22:16:43,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=896, PETRI_PLACES=96, PETRI_TRANSITIONS=121} [2023-11-06 22:16:43,591 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 42 predicate places. [2023-11-06 22:16:43,591 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 121 transitions, 896 flow [2023-11-06 22:16:43,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 228.6) internal successors, (1143), 5 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) [2023-11-06 22:16:43,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:43,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:43,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:43,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:16:43,803 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:16:43,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:43,804 INFO L85 PathProgramCache]: Analyzing trace with hash 2079105132, now seen corresponding path program 1 times [2023-11-06 22:16:43,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:16:43,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090585720] [2023-11-06 22:16:43,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:43,804 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 [2023-11-06 22:16:43,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:16:43,805 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:16:43,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:16:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:43,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:16:43,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:43,979 INFO L351 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 [2023-11-06 22:16:43,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:16:43,986 INFO L351 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 [2023-11-06 22:16:44,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:16:44,001 INFO L351 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 [2023-11-06 22:16:44,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:16:44,008 INFO L351 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 [2023-11-06 22:16:44,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:16:44,014 INFO L351 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 [2023-11-06 22:16:44,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:16:44,021 INFO L351 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 [2023-11-06 22:16:44,065 INFO L322 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-06 22:16:44,066 INFO L351 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 [2023-11-06 22:16:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:16:44,091 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:16:44,091 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:16:44,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090585720] [2023-11-06 22:16:44,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090585720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:44,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:44,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:16:44,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837168308] [2023-11-06 22:16:44,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:44,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:16:44,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:16:44,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:16:44,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:16:44,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 559 [2023-11-06 22:16:44,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 121 transitions, 896 flow. Second operand has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:44,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:44,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 559 [2023-11-06 22:16:44,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:45,286 INFO L124 PetriNetUnfolderBase]: 2134/3394 cut-off events. [2023-11-06 22:16:45,286 INFO L125 PetriNetUnfolderBase]: For 4583/4583 co-relation queries the response was YES. [2023-11-06 22:16:45,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11811 conditions, 3394 events. 2134/3394 cut-off events. For 4583/4583 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17510 event pairs, 1290 based on Foata normal form. 144/2938 useless extension candidates. Maximal degree in co-relation 11781. Up to 3334 conditions per place. [2023-11-06 22:16:45,304 INFO L140 encePairwiseOnDemand]: 553/559 looper letters, 89 selfloop transitions, 28 changer transitions 0/117 dead transitions. [2023-11-06 22:16:45,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 117 transitions, 1111 flow [2023-11-06 22:16:45,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:16:45,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:16:45,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1149 transitions. [2023-11-06 22:16:45,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110912343470483 [2023-11-06 22:16:45,309 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1149 transitions. [2023-11-06 22:16:45,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1149 transitions. [2023-11-06 22:16:45,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:45,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1149 transitions. [2023-11-06 22:16:45,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 229.8) internal successors, (1149), 5 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:45,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 559.0) internal successors, (3354), 6 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:45,315 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 559.0) internal successors, (3354), 6 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:45,316 INFO L175 Difference]: Start difference. First operand has 96 places, 121 transitions, 896 flow. Second operand 5 states and 1149 transitions. [2023-11-06 22:16:45,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 117 transitions, 1111 flow [2023-11-06 22:16:45,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 117 transitions, 1094 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-06 22:16:45,337 INFO L231 Difference]: Finished difference. Result has 95 places, 117 transitions, 916 flow [2023-11-06 22:16:45,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=916, PETRI_PLACES=95, PETRI_TRANSITIONS=117} [2023-11-06 22:16:45,338 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 41 predicate places. [2023-11-06 22:16:45,338 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 117 transitions, 916 flow [2023-11-06 22:16:45,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:45,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:45,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:45,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:45,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:16:45,550 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:16:45,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:45,551 INFO L85 PathProgramCache]: Analyzing trace with hash 280330445, now seen corresponding path program 1 times [2023-11-06 22:16:45,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:16:45,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585028120] [2023-11-06 22:16:45,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:45,552 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:16:45,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:16:45,553 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:16:45,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:16:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:45,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:16:45,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:45,719 INFO L351 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 [2023-11-06 22:16:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:16:45,868 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:16:45,869 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:16:45,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585028120] [2023-11-06 22:16:45,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585028120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:45,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:45,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:16:45,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105103833] [2023-11-06 22:16:45,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:45,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:16:45,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:16:45,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:16:45,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:16:46,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 559 [2023-11-06 22:16:46,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 117 transitions, 916 flow. Second operand has 5 states, 5 states have (on average 221.8) internal successors, (1109), 5 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:46,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:46,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 559 [2023-11-06 22:16:46,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:47,677 INFO L124 PetriNetUnfolderBase]: 2077/3313 cut-off events. [2023-11-06 22:16:47,677 INFO L125 PetriNetUnfolderBase]: For 4527/4527 co-relation queries the response was YES. [2023-11-06 22:16:47,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11485 conditions, 3313 events. 2077/3313 cut-off events. For 4527/4527 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 17058 event pairs, 1200 based on Foata normal form. 0/2761 useless extension candidates. Maximal degree in co-relation 11455. Up to 2953 conditions per place. [2023-11-06 22:16:47,696 INFO L140 encePairwiseOnDemand]: 550/559 looper letters, 122 selfloop transitions, 22 changer transitions 0/144 dead transitions. [2023-11-06 22:16:47,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 144 transitions, 1329 flow [2023-11-06 22:16:47,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:16:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:16:47,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1158 transitions. [2023-11-06 22:16:47,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4143112701252236 [2023-11-06 22:16:47,701 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1158 transitions. [2023-11-06 22:16:47,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1158 transitions. [2023-11-06 22:16:47,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:47,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1158 transitions. [2023-11-06 22:16:47,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 231.6) internal successors, (1158), 5 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:47,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 559.0) internal successors, (3354), 6 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:47,707 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 559.0) internal successors, (3354), 6 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:47,707 INFO L175 Difference]: Start difference. First operand has 95 places, 117 transitions, 916 flow. Second operand 5 states and 1158 transitions. [2023-11-06 22:16:47,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 144 transitions, 1329 flow [2023-11-06 22:16:47,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 144 transitions, 1289 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:16:47,729 INFO L231 Difference]: Finished difference. Result has 98 places, 121 transitions, 963 flow [2023-11-06 22:16:47,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=963, PETRI_PLACES=98, PETRI_TRANSITIONS=121} [2023-11-06 22:16:47,730 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 44 predicate places. [2023-11-06 22:16:47,730 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 121 transitions, 963 flow [2023-11-06 22:16:47,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 221.8) internal successors, (1109), 5 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:47,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:47,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:47,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:47,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:16:47,943 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:16:47,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:47,944 INFO L85 PathProgramCache]: Analyzing trace with hash 280330306, now seen corresponding path program 1 times [2023-11-06 22:16:47,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:16:47,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887424277] [2023-11-06 22:16:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:47,945 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 [2023-11-06 22:16:47,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:16:47,945 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:16:47,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:16:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:48,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:16:48,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:48,063 INFO L351 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 [2023-11-06 22:16:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:16:48,183 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:16:48,183 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:16:48,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887424277] [2023-11-06 22:16:48,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887424277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:48,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:48,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:16:48,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639123686] [2023-11-06 22:16:48,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:48,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:16:48,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:16:48,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:16:48,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:16:48,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 559 [2023-11-06 22:16:48,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 121 transitions, 963 flow. Second operand has 5 states, 5 states have (on average 229.8) internal successors, (1149), 5 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:48,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:48,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 559 [2023-11-06 22:16:48,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:50,020 INFO L124 PetriNetUnfolderBase]: 2768/4300 cut-off events. [2023-11-06 22:16:50,020 INFO L125 PetriNetUnfolderBase]: For 7761/7761 co-relation queries the response was YES. [2023-11-06 22:16:50,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16183 conditions, 4300 events. 2768/4300 cut-off events. For 7761/7761 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22816 event pairs, 1182 based on Foata normal form. 184/3780 useless extension candidates. Maximal degree in co-relation 16151. Up to 3242 conditions per place. [2023-11-06 22:16:50,049 INFO L140 encePairwiseOnDemand]: 553/559 looper letters, 133 selfloop transitions, 36 changer transitions 0/169 dead transitions. [2023-11-06 22:16:50,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 169 transitions, 1670 flow [2023-11-06 22:16:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:16:50,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:16:50,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1188 transitions. [2023-11-06 22:16:50,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42504472271914134 [2023-11-06 22:16:50,054 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1188 transitions. [2023-11-06 22:16:50,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1188 transitions. [2023-11-06 22:16:50,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:50,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1188 transitions. [2023-11-06 22:16:50,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 237.6) internal successors, (1188), 5 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:50,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 559.0) internal successors, (3354), 6 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:50,059 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 559.0) internal successors, (3354), 6 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:50,059 INFO L175 Difference]: Start difference. First operand has 98 places, 121 transitions, 963 flow. Second operand 5 states and 1188 transitions. [2023-11-06 22:16:50,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 169 transitions, 1670 flow [2023-11-06 22:16:50,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 169 transitions, 1637 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:16:50,089 INFO L231 Difference]: Finished difference. Result has 101 places, 123 transitions, 1029 flow [2023-11-06 22:16:50,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1029, PETRI_PLACES=101, PETRI_TRANSITIONS=123} [2023-11-06 22:16:50,090 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 47 predicate places. [2023-11-06 22:16:50,090 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 123 transitions, 1029 flow [2023-11-06 22:16:50,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 229.8) internal successors, (1149), 5 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:50,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:50,091 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1] [2023-11-06 22:16:50,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:50,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:16:50,302 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:16:50,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:50,303 INFO L85 PathProgramCache]: Analyzing trace with hash 164019164, now seen corresponding path program 1 times [2023-11-06 22:16:50,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:16:50,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899752348] [2023-11-06 22:16:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:50,303 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 [2023-11-06 22:16:50,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:16:50,305 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:16:50,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:16:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:50,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:16:50,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:50,439 INFO L351 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 [2023-11-06 22:16:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:50,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:52,785 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:16:52,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899752348] [2023-11-06 22:16:52,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899752348] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:52,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:52,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-11-06 22:16:52,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274260676] [2023-11-06 22:16:52,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:52,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:16:52,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:16:52,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:16:52,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:17:12,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 559 [2023-11-06 22:17:12,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 123 transitions, 1029 flow. Second operand has 18 states, 18 states have (on average 224.05555555555554) internal successors, (4033), 18 states have internal predecessors, (4033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:12,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:17:12,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 559 [2023-11-06 22:17:12,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:17:18,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:17:19,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:17:21,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:17:23,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:17:25,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:17:27,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:17:29,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:17:35,703 INFO L124 PetriNetUnfolderBase]: 2805/4374 cut-off events. [2023-11-06 22:17:35,703 INFO L125 PetriNetUnfolderBase]: For 10920/10920 co-relation queries the response was YES. [2023-11-06 22:17:35,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18076 conditions, 4374 events. 2805/4374 cut-off events. For 10920/10920 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22924 event pairs, 1680 based on Foata normal form. 37/4027 useless extension candidates. Maximal degree in co-relation 18044. Up to 4292 conditions per place. [2023-11-06 22:17:35,733 INFO L140 encePairwiseOnDemand]: 552/559 looper letters, 72 selfloop transitions, 71 changer transitions 0/143 dead transitions. [2023-11-06 22:17:35,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 143 transitions, 1503 flow [2023-11-06 22:17:35,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:17:35,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:17:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4109 transitions. [2023-11-06 22:17:35,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40836811767044323 [2023-11-06 22:17:35,739 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4109 transitions. [2023-11-06 22:17:35,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4109 transitions. [2023-11-06 22:17:35,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:17:35,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4109 transitions. [2023-11-06 22:17:35,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 228.27777777777777) internal successors, (4109), 18 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:35,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 559.0) internal successors, (10621), 19 states have internal predecessors, (10621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:35,753 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 559.0) internal successors, (10621), 19 states have internal predecessors, (10621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:35,753 INFO L175 Difference]: Start difference. First operand has 101 places, 123 transitions, 1029 flow. Second operand 18 states and 4109 transitions. [2023-11-06 22:17:35,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 143 transitions, 1503 flow [2023-11-06 22:17:35,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 143 transitions, 1420 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:17:35,784 INFO L231 Difference]: Finished difference. Result has 124 places, 143 transitions, 1377 flow [2023-11-06 22:17:35,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1377, PETRI_PLACES=124, PETRI_TRANSITIONS=143} [2023-11-06 22:17:35,785 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 70 predicate places. [2023-11-06 22:17:35,785 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 143 transitions, 1377 flow [2023-11-06 22:17:35,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 224.05555555555554) internal successors, (4033), 18 states have internal predecessors, (4033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:35,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:35,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:35,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:35,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:17:35,998 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:17:35,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:35,999 INFO L85 PathProgramCache]: Analyzing trace with hash 861948847, now seen corresponding path program 1 times [2023-11-06 22:17:35,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:17:35,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715125423] [2023-11-06 22:17:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:35,999 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 [2023-11-06 22:17:35,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:17:36,000 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:17:36,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:17:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:36,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:17:36,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:36,240 INFO L351 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 [2023-11-06 22:17:36,252 INFO L351 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 [2023-11-06 22:17:36,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:17:36,271 INFO L351 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 [2023-11-06 22:17:36,280 INFO L351 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 [2023-11-06 22:17:36,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:17:36,290 INFO L351 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 [2023-11-06 22:17:36,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:17:36,301 INFO L351 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 [2023-11-06 22:17:36,309 INFO L351 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 [2023-11-06 22:17:36,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:17:36,319 INFO L351 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 [2023-11-06 22:17:36,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:17:36,338 INFO L351 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 [2023-11-06 22:17:36,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:17:36,455 INFO L351 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 [2023-11-06 22:17:36,481 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:17:36,482 INFO L351 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 [2023-11-06 22:17:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:17:36,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:17:37,131 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:17:37,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715125423] [2023-11-06 22:17:37,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715125423] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:37,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:17:37,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:17:37,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417539039] [2023-11-06 22:17:37,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:37,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:17:37,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:17:37,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:17:37,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:17:39,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:17:48,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:17:51,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 559 [2023-11-06 22:17:51,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 143 transitions, 1377 flow. Second operand has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:51,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:17:51,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 559 [2023-11-06 22:17:51,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:17:56,544 INFO L124 PetriNetUnfolderBase]: 2621/4086 cut-off events. [2023-11-06 22:17:56,544 INFO L125 PetriNetUnfolderBase]: For 9655/9655 co-relation queries the response was YES. [2023-11-06 22:17:56,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16806 conditions, 4086 events. 2621/4086 cut-off events. For 9655/9655 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21125 event pairs, 1374 based on Foata normal form. 104/3814 useless extension candidates. Maximal degree in co-relation 16764. Up to 1676 conditions per place. [2023-11-06 22:17:56,603 INFO L140 encePairwiseOnDemand]: 548/559 looper letters, 229 selfloop transitions, 54 changer transitions 0/283 dead transitions. [2023-11-06 22:17:56,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 283 transitions, 3057 flow [2023-11-06 22:17:56,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:17:56,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:17:56,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3893 transitions. [2023-11-06 22:17:56,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38690121248260784 [2023-11-06 22:17:56,613 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3893 transitions. [2023-11-06 22:17:56,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3893 transitions. [2023-11-06 22:17:56,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:17:56,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3893 transitions. [2023-11-06 22:17:56,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 216.27777777777777) internal successors, (3893), 18 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:56,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 559.0) internal successors, (10621), 19 states have internal predecessors, (10621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:56,631 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 559.0) internal successors, (10621), 19 states have internal predecessors, (10621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:56,632 INFO L175 Difference]: Start difference. First operand has 124 places, 143 transitions, 1377 flow. Second operand 18 states and 3893 transitions. [2023-11-06 22:17:56,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 283 transitions, 3057 flow [2023-11-06 22:17:56,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 283 transitions, 2764 flow, removed 107 selfloop flow, removed 6 redundant places. [2023-11-06 22:17:56,690 INFO L231 Difference]: Finished difference. Result has 137 places, 153 transitions, 1454 flow [2023-11-06 22:17:56,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1454, PETRI_PLACES=137, PETRI_TRANSITIONS=153} [2023-11-06 22:17:56,691 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 83 predicate places. [2023-11-06 22:17:56,692 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 153 transitions, 1454 flow [2023-11-06 22:17:56,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:56,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:56,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:56,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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)] Ended with exit code 0 [2023-11-06 22:17:56,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:17:56,905 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:17:56,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:56,906 INFO L85 PathProgramCache]: Analyzing trace with hash 860320664, now seen corresponding path program 1 times [2023-11-06 22:17:56,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:17:56,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123686811] [2023-11-06 22:17:56,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:56,907 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 [2023-11-06 22:17:56,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:17:56,908 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:17:56,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:17:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:57,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:17:57,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:57,076 INFO L351 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 [2023-11-06 22:17:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:17:57,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:17:58,095 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:17:58,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123686811] [2023-11-06 22:17:58,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123686811] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:58,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:17:58,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-06 22:17:58,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45264207] [2023-11-06 22:17:58,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:58,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:17:58,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:17:58,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:17:58,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:18:06,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 559 [2023-11-06 22:18:06,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 153 transitions, 1454 flow. Second operand has 12 states, 12 states have (on average 222.5) internal successors, (2670), 12 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:06,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:06,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 559 [2023-11-06 22:18:06,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:10,785 INFO L124 PetriNetUnfolderBase]: 5245/7906 cut-off events. [2023-11-06 22:18:10,785 INFO L125 PetriNetUnfolderBase]: For 24135/24135 co-relation queries the response was YES. [2023-11-06 22:18:10,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35005 conditions, 7906 events. 5245/7906 cut-off events. For 24135/24135 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 42101 event pairs, 756 based on Foata normal form. 96/7302 useless extension candidates. Maximal degree in co-relation 34960. Up to 2852 conditions per place. [2023-11-06 22:18:10,896 INFO L140 encePairwiseOnDemand]: 547/559 looper letters, 200 selfloop transitions, 93 changer transitions 0/293 dead transitions. [2023-11-06 22:18:10,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 293 transitions, 3186 flow [2023-11-06 22:18:10,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:18:10,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:18:10,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2097 transitions. [2023-11-06 22:18:10,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41681574239713776 [2023-11-06 22:18:10,901 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2097 transitions. [2023-11-06 22:18:10,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2097 transitions. [2023-11-06 22:18:10,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:10,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2097 transitions. [2023-11-06 22:18:10,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 233.0) internal successors, (2097), 9 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:10,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 559.0) internal successors, (5590), 10 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:10,909 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 559.0) internal successors, (5590), 10 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:10,909 INFO L175 Difference]: Start difference. First operand has 137 places, 153 transitions, 1454 flow. Second operand 9 states and 2097 transitions. [2023-11-06 22:18:10,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 293 transitions, 3186 flow [2023-11-06 22:18:11,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 293 transitions, 3015 flow, removed 56 selfloop flow, removed 12 redundant places. [2023-11-06 22:18:11,007 INFO L231 Difference]: Finished difference. Result has 138 places, 184 transitions, 1966 flow [2023-11-06 22:18:11,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=1371, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1966, PETRI_PLACES=138, PETRI_TRANSITIONS=184} [2023-11-06 22:18:11,008 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 84 predicate places. [2023-11-06 22:18:11,008 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 184 transitions, 1966 flow [2023-11-06 22:18:11,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 222.5) internal successors, (2670), 12 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:11,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:11,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:11,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:11,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:18:11,209 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:18:11,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:11,209 INFO L85 PathProgramCache]: Analyzing trace with hash 860320613, now seen corresponding path program 1 times [2023-11-06 22:18:11,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:18:11,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207467227] [2023-11-06 22:18:11,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:11,210 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 [2023-11-06 22:18:11,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:18:11,211 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:18:11,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:18:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:11,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:18:11,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:11,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:11,692 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:18:11,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207467227] [2023-11-06 22:18:11,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207467227] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:11,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:18:11,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:18:11,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117212739] [2023-11-06 22:18:11,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:11,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:18:11,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:18:11,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:18:11,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:18:13,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 559 [2023-11-06 22:18:13,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 184 transitions, 1966 flow. Second operand has 12 states, 12 states have (on average 224.66666666666666) internal successors, (2696), 12 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:13,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:13,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 559 [2023-11-06 22:18:13,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:16,438 INFO L124 PetriNetUnfolderBase]: 4157/6314 cut-off events. [2023-11-06 22:18:16,438 INFO L125 PetriNetUnfolderBase]: For 30641/30641 co-relation queries the response was YES. [2023-11-06 22:18:16,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31691 conditions, 6314 events. 4157/6314 cut-off events. For 30641/30641 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 32242 event pairs, 2152 based on Foata normal form. 56/6370 useless extension candidates. Maximal degree in co-relation 31641. Up to 5244 conditions per place. [2023-11-06 22:18:16,515 INFO L140 encePairwiseOnDemand]: 548/559 looper letters, 277 selfloop transitions, 20 changer transitions 0/297 dead transitions. [2023-11-06 22:18:16,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 297 transitions, 3463 flow [2023-11-06 22:18:16,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:18:16,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:18:16,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2334 transitions. [2023-11-06 22:18:16,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41753130590339893 [2023-11-06 22:18:16,521 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2334 transitions. [2023-11-06 22:18:16,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2334 transitions. [2023-11-06 22:18:16,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:16,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2334 transitions. [2023-11-06 22:18:16,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 233.4) internal successors, (2334), 10 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:16,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 559.0) internal successors, (6149), 11 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:16,534 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 559.0) internal successors, (6149), 11 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:16,534 INFO L175 Difference]: Start difference. First operand has 138 places, 184 transitions, 1966 flow. Second operand 10 states and 2334 transitions. [2023-11-06 22:18:16,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 297 transitions, 3463 flow [2023-11-06 22:18:16,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 297 transitions, 3364 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-11-06 22:18:16,656 INFO L231 Difference]: Finished difference. Result has 146 places, 177 transitions, 1912 flow [2023-11-06 22:18:16,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1912, PETRI_PLACES=146, PETRI_TRANSITIONS=177} [2023-11-06 22:18:16,656 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 92 predicate places. [2023-11-06 22:18:16,657 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 177 transitions, 1912 flow [2023-11-06 22:18:16,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 224.66666666666666) internal successors, (2696), 12 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:16,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:16,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:16,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:16,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:18:16,862 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:18:16,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:16,862 INFO L85 PathProgramCache]: Analyzing trace with hash -595832691, now seen corresponding path program 1 times [2023-11-06 22:18:16,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:18:16,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819298407] [2023-11-06 22:18:16,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:16,862 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 [2023-11-06 22:18:16,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:18:16,864 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:18:16,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:18:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:17,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:18:17,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:17,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:17,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:18:17,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819298407] [2023-11-06 22:18:17,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819298407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:17,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:18:17,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:18:17,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832514991] [2023-11-06 22:18:17,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:17,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:18:17,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:18:17,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:18:17,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:18:19,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 559 [2023-11-06 22:18:19,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 177 transitions, 1912 flow. Second operand has 12 states, 12 states have (on average 225.0) internal successors, (2700), 12 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:19,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:19,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 559 [2023-11-06 22:18:19,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:22,350 INFO L124 PetriNetUnfolderBase]: 3993/6078 cut-off events. [2023-11-06 22:18:22,350 INFO L125 PetriNetUnfolderBase]: For 32031/32031 co-relation queries the response was YES. [2023-11-06 22:18:22,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30605 conditions, 6078 events. 3993/6078 cut-off events. For 32031/32031 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 30844 event pairs, 2166 based on Foata normal form. 108/6186 useless extension candidates. Maximal degree in co-relation 30552. Up to 5244 conditions per place. [2023-11-06 22:18:22,421 INFO L140 encePairwiseOnDemand]: 549/559 looper letters, 277 selfloop transitions, 19 changer transitions 0/296 dead transitions. [2023-11-06 22:18:22,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 296 transitions, 3473 flow [2023-11-06 22:18:22,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:18:22,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:18:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2337 transitions. [2023-11-06 22:18:22,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4180679785330948 [2023-11-06 22:18:22,425 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2337 transitions. [2023-11-06 22:18:22,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2337 transitions. [2023-11-06 22:18:22,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:22,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2337 transitions. [2023-11-06 22:18:22,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 233.7) internal successors, (2337), 10 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:22,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 559.0) internal successors, (6149), 11 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:22,437 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 559.0) internal successors, (6149), 11 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:22,437 INFO L175 Difference]: Start difference. First operand has 146 places, 177 transitions, 1912 flow. Second operand 10 states and 2337 transitions. [2023-11-06 22:18:22,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 296 transitions, 3473 flow [2023-11-06 22:18:22,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 296 transitions, 3408 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-11-06 22:18:22,586 INFO L231 Difference]: Finished difference. Result has 151 places, 178 transitions, 1943 flow [2023-11-06 22:18:22,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1943, PETRI_PLACES=151, PETRI_TRANSITIONS=178} [2023-11-06 22:18:22,587 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 97 predicate places. [2023-11-06 22:18:22,587 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 178 transitions, 1943 flow [2023-11-06 22:18:22,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 225.0) internal successors, (2700), 12 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:22,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:22,588 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:22,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:22,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:18:22,788 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:18:22,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:22,789 INFO L85 PathProgramCache]: Analyzing trace with hash -2147358959, now seen corresponding path program 2 times [2023-11-06 22:18:22,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:18:22,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332479404] [2023-11-06 22:18:22,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:18:22,789 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 [2023-11-06 22:18:22,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:18:22,791 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:18:22,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:18:22,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:18:22,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:22,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:18:22,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:23,016 INFO L351 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 [2023-11-06 22:18:23,024 INFO L351 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 1 [2023-11-06 22:18:23,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:23,043 INFO L351 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 [2023-11-06 22:18:23,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:23,054 INFO L351 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 [2023-11-06 22:18:23,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:23,078 INFO L351 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 [2023-11-06 22:18:23,089 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-11-06 22:18:23,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:23,122 INFO L351 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 [2023-11-06 22:18:23,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:23,213 INFO L351 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 [2023-11-06 22:18:23,232 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:18:23,233 INFO L351 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 [2023-11-06 22:18:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:23,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:24,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:18:24,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332479404] [2023-11-06 22:18:24,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332479404] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:24,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:18:24,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-06 22:18:24,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984318921] [2023-11-06 22:18:24,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:24,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:18:24,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:18:24,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:18:24,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:18:35,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 559 [2023-11-06 22:18:35,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 178 transitions, 1943 flow. Second operand has 14 states, 14 states have (on average 213.57142857142858) internal successors, (2990), 14 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:35,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:35,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 559 [2023-11-06 22:18:35,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:40,476 INFO L124 PetriNetUnfolderBase]: 3817/5810 cut-off events. [2023-11-06 22:18:40,476 INFO L125 PetriNetUnfolderBase]: For 34556/34556 co-relation queries the response was YES. [2023-11-06 22:18:40,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30050 conditions, 5810 events. 3817/5810 cut-off events. For 34556/34556 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 29135 event pairs, 828 based on Foata normal form. 112/5922 useless extension candidates. Maximal degree in co-relation 29995. Up to 2144 conditions per place. [2023-11-06 22:18:40,571 INFO L140 encePairwiseOnDemand]: 547/559 looper letters, 182 selfloop transitions, 101 changer transitions 0/283 dead transitions. [2023-11-06 22:18:40,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 283 transitions, 3333 flow [2023-11-06 22:18:40,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:18:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:18:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2870 transitions. [2023-11-06 22:18:40,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39493601210953627 [2023-11-06 22:18:40,578 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2870 transitions. [2023-11-06 22:18:40,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2870 transitions. [2023-11-06 22:18:40,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:40,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2870 transitions. [2023-11-06 22:18:40,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 220.76923076923077) internal successors, (2870), 13 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:40,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 559.0) internal successors, (7826), 14 states have internal predecessors, (7826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:40,595 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 559.0) internal successors, (7826), 14 states have internal predecessors, (7826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:40,595 INFO L175 Difference]: Start difference. First operand has 151 places, 178 transitions, 1943 flow. Second operand 13 states and 2870 transitions. [2023-11-06 22:18:40,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 283 transitions, 3333 flow [2023-11-06 22:18:40,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 283 transitions, 3290 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-11-06 22:18:40,743 INFO L231 Difference]: Finished difference. Result has 160 places, 198 transitions, 2438 flow [2023-11-06 22:18:40,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=1896, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2438, PETRI_PLACES=160, PETRI_TRANSITIONS=198} [2023-11-06 22:18:40,743 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 106 predicate places. [2023-11-06 22:18:40,744 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 198 transitions, 2438 flow [2023-11-06 22:18:40,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 213.57142857142858) internal successors, (2990), 14 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:40,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:40,744 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:40,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:40,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:18:40,945 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 22:18:40,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:40,945 INFO L85 PathProgramCache]: Analyzing trace with hash -462911175, now seen corresponding path program 2 times [2023-11-06 22:18:40,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:18:40,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638285334] [2023-11-06 22:18:40,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:18:40,946 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 [2023-11-06 22:18:40,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:18:40,947 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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) [2023-11-06 22:18:40,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a2623a-1039-451d-8020-034df1820d6a/bin/uautomizer-verify-WvqO1wxjHP/mathsat -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 [2023-11-06 22:18:41,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:18:41,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:41,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:18:41,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:41,169 INFO L351 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 [2023-11-06 22:18:41,177 INFO L351 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 1 [2023-11-06 22:18:41,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:41,201 INFO L351 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 [2023-11-06 22:18:41,206 INFO L351 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 1 [2023-11-06 22:18:41,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:41,211 INFO L351 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 [2023-11-06 22:18:41,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:41,223 INFO L351 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 [2023-11-06 22:18:41,228 INFO L351 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 1 [2023-11-06 22:18:41,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:41,234 INFO L351 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 [2023-11-06 22:18:41,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:41,247 INFO L351 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 [2023-11-06 22:18:41,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:41,315 INFO L351 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 [2023-11-06 22:18:41,325 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:18:41,325 INFO L351 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 [2023-11-06 22:18:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:41,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:42,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:18:42,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638285334] [2023-11-06 22:18:42,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638285334] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:42,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:18:42,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-06 22:18:42,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905667085] [2023-11-06 22:18:42,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:42,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:18:42,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:18:42,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:18:42,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182