./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:42:34,078 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:42:34,139 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 06:42:34,145 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:42:34,145 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:42:34,167 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:42:34,168 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:42:34,169 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:42:34,169 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:42:34,170 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:42:34,170 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:42:34,171 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:42:34,172 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:42:34,172 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:42:34,173 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:42:34,173 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:42:34,174 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:42:34,174 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:42:34,175 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:42:34,175 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:42:34,176 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 06:42:34,177 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 06:42:34,177 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 06:42:34,177 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:42:34,178 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 06:42:34,178 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 06:42:34,179 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:42:34,179 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:42:34,179 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:42:34,180 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:42:34,180 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:42:34,181 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:42:34,181 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:42:34,181 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:42:34,182 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:42:34,182 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:42:34,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:42:34,182 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:42:34,183 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:42:34,183 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:42:34,183 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:42:34,183 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_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 [2023-11-29 06:42:34,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:42:34,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:42:34,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:42:34,415 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:42:34,416 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:42:34,417 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2023-11-29 06:42:37,177 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:42:37,358 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:42:37,358 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2023-11-29 06:42:37,364 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/data/b7ef9c00d/643f80642510476b9e3cf424d1c750cc/FLAGb5152d10a [2023-11-29 06:42:37,376 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/data/b7ef9c00d/643f80642510476b9e3cf424d1c750cc [2023-11-29 06:42:37,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:42:37,380 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:42:37,381 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:42:37,381 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:42:37,386 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:42:37,387 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:42:37" (1/1) ... [2023-11-29 06:42:37,388 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fd822ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:42:37, skipping insertion in model container [2023-11-29 06:42:37,388 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:42:37" (1/1) ... [2023-11-29 06:42:37,414 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:42:37,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:42:37,613 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-29 06:42:37,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@115da59b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:42:37, skipping insertion in model container [2023-11-29 06:42:37,614 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:42:37,614 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-29 06:42:37,616 INFO L158 Benchmark]: Toolchain (without parser) took 235.49ms. Allocated memory is still 146.8MB. Free memory was 101.0MB in the beginning and 91.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 06:42:37,616 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 146.8MB. Free memory is still 119.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 06:42:37,617 INFO L158 Benchmark]: CACSL2BoogieTranslator took 233.32ms. Allocated memory is still 146.8MB. Free memory was 100.9MB in the beginning and 91.0MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 06:42:37,618 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 146.8MB. Free memory is still 119.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 233.32ms. Allocated memory is still 146.8MB. Free memory was 100.9MB in the beginning and 91.0MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 112]: 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_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:42:39,288 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:42:39,353 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 06:42:39,358 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:42:39,367 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:42:39,395 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:42:39,396 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:42:39,397 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:42:39,397 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:42:39,398 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:42:39,399 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:42:39,399 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:42:39,400 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:42:39,400 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:42:39,401 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:42:39,401 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:42:39,402 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:42:39,402 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:42:39,403 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:42:39,403 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:42:39,404 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 06:42:39,408 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 06:42:39,409 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 06:42:39,409 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:42:39,409 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 06:42:39,410 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 06:42:39,410 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 06:42:39,410 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 06:42:39,411 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:42:39,411 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:42:39,412 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:42:39,412 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:42:39,412 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:42:39,413 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:42:39,413 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:42:39,413 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:42:39,413 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:42:39,414 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 06:42:39,414 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 06:42:39,414 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:42:39,414 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:42:39,415 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:42:39,415 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:42:39,415 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 06:42:39,415 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_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 [2023-11-29 06:42:39,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:42:39,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:42:39,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:42:39,727 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:42:39,727 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:42:39,729 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2023-11-29 06:42:42,529 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:42:42,728 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:42:42,729 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2023-11-29 06:42:42,738 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/data/55d36e94c/9ab60c565b5a4e1c8db639ffe2103ae6/FLAG430b8cc80 [2023-11-29 06:42:42,752 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/data/55d36e94c/9ab60c565b5a4e1c8db639ffe2103ae6 [2023-11-29 06:42:42,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:42:42,756 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:42:42,758 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:42:42,758 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:42:42,763 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:42:42,764 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:42:42" (1/1) ... [2023-11-29 06:42:42,765 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@484c1b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:42:42, skipping insertion in model container [2023-11-29 06:42:42,765 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:42:42" (1/1) ... [2023-11-29 06:42:42,791 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:42:42,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:42:43,002 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 06:42:43,007 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:42:43,025 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:42:43,030 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:42:43,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:42:43,067 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:42:43,067 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:42:43,075 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:42:43,075 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:42:43 WrapperNode [2023-11-29 06:42:43,076 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:42:43,077 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:42:43,077 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:42:43,077 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:42:43,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:42:43" (1/1) ... [2023-11-29 06:42:43,096 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:42:43" (1/1) ... [2023-11-29 06:42:43,120 INFO L138 Inliner]: procedures = 28, calls = 44, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 126 [2023-11-29 06:42:43,121 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:42:43,122 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:42:43,122 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:42:43,122 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:42:43,134 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:42:43" (1/1) ... [2023-11-29 06:42:43,134 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:42:43" (1/1) ... [2023-11-29 06:42:43,139 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:42:43" (1/1) ... [2023-11-29 06:42:43,157 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 2, 2, 2, 6]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 1, 1, 3]. [2023-11-29 06:42:43,158 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:42:43" (1/1) ... [2023-11-29 06:42:43,158 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:42:43" (1/1) ... [2023-11-29 06:42:43,180 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:42:43" (1/1) ... [2023-11-29 06:42:43,184 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:42:43" (1/1) ... [2023-11-29 06:42:43,187 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:42:43" (1/1) ... [2023-11-29 06:42:43,189 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:42:43" (1/1) ... [2023-11-29 06:42:43,194 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:42:43,195 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:42:43,195 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:42:43,195 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:42:43,196 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:42:43" (1/1) ... [2023-11-29 06:42:43,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:42:43,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:42:43,250 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:42:43,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:42:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:42:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 06:42:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 06:42:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 06:42:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 06:42:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-29 06:42:43,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:42:43,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 06:42:43,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 06:42:43,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 06:42:43,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 06:42:43,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-29 06:42:43,291 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 06:42:43,291 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 06:42:43,291 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 06:42:43,291 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 06:42:43,291 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 06:42:43,291 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 06:42:43,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 06:42:43,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 06:42:43,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 06:42:43,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:42:43,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:42:43,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:42:43,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 06:42:43,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 06:42:43,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 06:42:43,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 06:42:43,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-29 06:42:43,295 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 06:42:43,425 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:42:43,427 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:42:43,903 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:42:44,207 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:42:44,208 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-29 06:42:44,208 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:42:44 BoogieIcfgContainer [2023-11-29 06:42:44,208 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:42:44,211 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:42:44,211 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:42:44,214 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:42:44,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:42:42" (1/3) ... [2023-11-29 06:42:44,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a5ee02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:42:44, skipping insertion in model container [2023-11-29 06:42:44,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:42:43" (2/3) ... [2023-11-29 06:42:44,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a5ee02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:42:44, skipping insertion in model container [2023-11-29 06:42:44,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:42:44" (3/3) ... [2023-11-29 06:42:44,217 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2023-11-29 06:42:44,236 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:42:44,236 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-29 06:42:44,236 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 06:42:44,315 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 06:42:44,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 75 transitions, 171 flow [2023-11-29 06:42:44,379 INFO L124 PetriNetUnfolderBase]: 6/72 cut-off events. [2023-11-29 06:42:44,380 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 06:42:44,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 72 events. 6/72 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 153 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-11-29 06:42:44,384 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 75 transitions, 171 flow [2023-11-29 06:42:44,388 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 71 transitions, 160 flow [2023-11-29 06:42:44,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:42:44,403 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;@7a15758e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:42:44,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2023-11-29 06:42:44,407 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:42:44,408 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-29 06:42:44,408 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 06:42:44,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:42:44,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 06:42:44,409 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:42:44,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:42:44,413 INFO L85 PathProgramCache]: Analyzing trace with hash 509839, now seen corresponding path program 1 times [2023-11-29 06:42:44,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:42:44,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122571534] [2023-11-29 06:42:44,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:42:44,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:42:44,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:42:44,440 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:42:44,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-29 06:42:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:42:44,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:42:44,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:42:44,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:42:44,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:42:44,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:42:44,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:42:44,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:42:44,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:42:44,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:42:44,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:42:44,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:42:44,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:42:44,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:42:44,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:42:44,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:42:44,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:42:44,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:42:44,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:42:44,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:42:44,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:42:44,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:42:44,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:42:44,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:42:44,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:42:44,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 06:42:44,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:44,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:42:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:42:44,922 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:42:44,923 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:42:44,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122571534] [2023-11-29 06:42:44,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122571534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:42:44,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:42:44,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:42:44,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65573207] [2023-11-29 06:42:44,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:42:44,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:42:44,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:42:44,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:42:44,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:42:45,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2023-11-29 06:42:45,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:45,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:42:45,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2023-11-29 06:42:45,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:42:45,489 INFO L124 PetriNetUnfolderBase]: 984/1807 cut-off events. [2023-11-29 06:42:45,489 INFO L125 PetriNetUnfolderBase]: For 195/197 co-relation queries the response was YES. [2023-11-29 06:42:45,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3253 conditions, 1807 events. 984/1807 cut-off events. For 195/197 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10975 event pairs, 706 based on Foata normal form. 1/1307 useless extension candidates. Maximal degree in co-relation 2772. Up to 1325 conditions per place. [2023-11-29 06:42:45,509 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 32 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-11-29 06:42:45,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 220 flow [2023-11-29 06:42:45,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:42:45,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:42:45,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-11-29 06:42:45,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6577777777777778 [2023-11-29 06:42:45,521 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-11-29 06:42:45,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-11-29 06:42:45,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:42:45,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-11-29 06:42:45,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:45,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:45,531 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:45,533 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 160 flow. Second operand 3 states and 148 transitions. [2023-11-29 06:42:45,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 220 flow [2023-11-29 06:42:45,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 208 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 06:42:45,542 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 144 flow [2023-11-29 06:42:45,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2023-11-29 06:42:45,547 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -8 predicate places. [2023-11-29 06:42:45,547 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 144 flow [2023-11-29 06:42:45,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:45,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:42:45,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 06:42:45,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:42:45,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:42:45,748 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:42:45,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:42:45,749 INFO L85 PathProgramCache]: Analyzing trace with hash 509840, now seen corresponding path program 1 times [2023-11-29 06:42:45,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:42:45,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670527669] [2023-11-29 06:42:45,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:42:45,750 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:42:45,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:42:45,752 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:42:45,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-29 06:42:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:42:45,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:42:45,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:42:45,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 06:42:45,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:45,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:45,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:45,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:45,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:45,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:42:45,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:45,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:42:45,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:45,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:45,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:45,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:42:45,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:45,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:45,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:45,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:42:45,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:45,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:45,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:45,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:42:45,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:45,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:46,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:46,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:42:46,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:46,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:46,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:46,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:42:46,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:46,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:46,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:46,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:46,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:46,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:42:46,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:46,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:42:46,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:46,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:46,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:46,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:46,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:46,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:42:46,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:46,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 06:42:46,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:46,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:42:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:42:46,263 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:42:46,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:42:46,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670527669] [2023-11-29 06:42:46,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670527669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:42:46,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:42:46,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:42:46,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745040646] [2023-11-29 06:42:46,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:42:46,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:42:46,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:42:46,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:42:46,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:42:46,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2023-11-29 06:42:46,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:46,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:42:46,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2023-11-29 06:42:46,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:42:46,976 INFO L124 PetriNetUnfolderBase]: 986/1813 cut-off events. [2023-11-29 06:42:46,976 INFO L125 PetriNetUnfolderBase]: For 55/57 co-relation queries the response was YES. [2023-11-29 06:42:46,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3185 conditions, 1813 events. 986/1813 cut-off events. For 55/57 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10963 event pairs, 706 based on Foata normal form. 0/1310 useless extension candidates. Maximal degree in co-relation 3149. Up to 1334 conditions per place. [2023-11-29 06:42:46,993 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 35 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2023-11-29 06:42:46,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 73 transitions, 242 flow [2023-11-29 06:42:46,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:42:46,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:42:46,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 192 transitions. [2023-11-29 06:42:46,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2023-11-29 06:42:46,997 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 192 transitions. [2023-11-29 06:42:46,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 192 transitions. [2023-11-29 06:42:46,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:42:46,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 192 transitions. [2023-11-29 06:42:46,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:47,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:47,001 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:47,001 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 144 flow. Second operand 4 states and 192 transitions. [2023-11-29 06:42:47,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 73 transitions, 242 flow [2023-11-29 06:42:47,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 73 transitions, 236 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 06:42:47,004 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 196 flow [2023-11-29 06:42:47,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2023-11-29 06:42:47,005 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -4 predicate places. [2023-11-29 06:42:47,005 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 196 flow [2023-11-29 06:42:47,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:47,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:42:47,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-29 06:42:47,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-29 06:42:47,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:42:47,209 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:42:47,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:42:47,209 INFO L85 PathProgramCache]: Analyzing trace with hash 15805991, now seen corresponding path program 1 times [2023-11-29 06:42:47,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:42:47,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048796662] [2023-11-29 06:42:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:42:47,210 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 [2023-11-29 06:42:47,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:42:47,211 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:42:47,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-29 06:42:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:42:47,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:42:47,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:42:47,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:47,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:47,368 INFO L349 Elim1Store]: treesize reduction 44, result has 25.4 percent of original size [2023-11-29 06:42:47,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 29 [2023-11-29 06:42:47,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:47,460 INFO L349 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2023-11-29 06:42:47,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 37 [2023-11-29 06:42:47,614 INFO L349 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-11-29 06:42:47,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 75 [2023-11-29 06:42:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:42:48,102 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:42:48,102 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:42:48,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048796662] [2023-11-29 06:42:48,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048796662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:42:48,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:42:48,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:42:48,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817752614] [2023-11-29 06:42:48,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:42:48,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:42:48,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:42:48,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:42:48,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:42:48,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2023-11-29 06:42:48,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:48,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:42:48,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2023-11-29 06:42:48,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:42:48,666 INFO L124 PetriNetUnfolderBase]: 986/1788 cut-off events. [2023-11-29 06:42:48,666 INFO L125 PetriNetUnfolderBase]: For 56/58 co-relation queries the response was YES. [2023-11-29 06:42:48,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3179 conditions, 1788 events. 986/1788 cut-off events. For 56/58 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10631 event pairs, 706 based on Foata normal form. 145/1458 useless extension candidates. Maximal degree in co-relation 3135. Up to 1336 conditions per place. [2023-11-29 06:42:48,684 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 39 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-11-29 06:42:48,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 71 transitions, 272 flow [2023-11-29 06:42:48,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:42:48,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:42:48,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2023-11-29 06:42:48,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2023-11-29 06:42:48,687 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 147 transitions. [2023-11-29 06:42:48,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 147 transitions. [2023-11-29 06:42:48,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:42:48,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 147 transitions. [2023-11-29 06:42:48,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:48,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:48,689 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:48,689 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 196 flow. Second operand 3 states and 147 transitions. [2023-11-29 06:42:48,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 71 transitions, 272 flow [2023-11-29 06:42:48,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 06:42:48,692 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 194 flow [2023-11-29 06:42:48,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-11-29 06:42:48,693 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -4 predicate places. [2023-11-29 06:42:48,694 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 194 flow [2023-11-29 06:42:48,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:48,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:42:48,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-29 06:42:48,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-29 06:42:48,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:42:48,895 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:42:48,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:42:48,895 INFO L85 PathProgramCache]: Analyzing trace with hash 15805992, now seen corresponding path program 1 times [2023-11-29 06:42:48,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:42:48,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817784849] [2023-11-29 06:42:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:42:48,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:42:48,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:42:48,897 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:42:48,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-29 06:42:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:42:49,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:42:49,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:42:49,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:49,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:49,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 06:42:49,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:49,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:49,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 06:42:49,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:49,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:49,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:49,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:42:49,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:49,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:49,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:49,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:49,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 06:42:49,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:49,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 06:42:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:42:49,243 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:42:49,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:42:49,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817784849] [2023-11-29 06:42:49,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817784849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:42:49,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:42:49,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:42:49,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137703319] [2023-11-29 06:42:49,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:42:49,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:42:49,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:42:49,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:42:49,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:42:49,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2023-11-29 06:42:49,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:49,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:42:49,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2023-11-29 06:42:49,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:42:49,743 INFO L124 PetriNetUnfolderBase]: 986/1763 cut-off events. [2023-11-29 06:42:49,743 INFO L125 PetriNetUnfolderBase]: For 56/58 co-relation queries the response was YES. [2023-11-29 06:42:49,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3156 conditions, 1763 events. 986/1763 cut-off events. For 56/58 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10274 event pairs, 706 based on Foata normal form. 145/1458 useless extension candidates. Maximal degree in co-relation 3145. Up to 1336 conditions per place. [2023-11-29 06:42:49,758 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 39 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-11-29 06:42:49,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 270 flow [2023-11-29 06:42:49,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:42:49,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:42:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2023-11-29 06:42:49,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2023-11-29 06:42:49,760 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 147 transitions. [2023-11-29 06:42:49,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 147 transitions. [2023-11-29 06:42:49,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:42:49,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 147 transitions. [2023-11-29 06:42:49,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:49,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:49,763 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:49,763 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 194 flow. Second operand 3 states and 147 transitions. [2023-11-29 06:42:49,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 270 flow [2023-11-29 06:42:49,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 269 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:42:49,766 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 191 flow [2023-11-29 06:42:49,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2023-11-29 06:42:49,767 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -5 predicate places. [2023-11-29 06:42:49,767 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 191 flow [2023-11-29 06:42:49,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:49,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:42:49,767 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-29 06:42:49,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-29 06:42:49,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:42:49,970 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:42:49,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:42:49,970 INFO L85 PathProgramCache]: Analyzing trace with hash 489972126, now seen corresponding path program 1 times [2023-11-29 06:42:49,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:42:49,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453256497] [2023-11-29 06:42:49,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:42:49,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:42:49,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:42:49,972 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:42:49,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-29 06:42:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:42:50,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:42:50,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:42:50,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 06:42:50,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:50,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:50,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:42:50,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:50,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:42:50,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:42:50,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:50,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:50,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:42:50,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:42:50,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 06:42:50,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:42:50,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:50,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:50,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:42:50,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:50,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:42:50,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:42:50,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:50,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:42:50,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:50,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:42:50,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:50,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:42:50,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:42:50,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:42:50,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:42:50,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453256497] [2023-11-29 06:42:50,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453256497] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:42:50,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:42:50,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 06:42:50,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73638045] [2023-11-29 06:42:50,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:42:50,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:42:50,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:42:50,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:42:50,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:42:51,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2023-11-29 06:42:51,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 191 flow. Second operand has 10 states, 10 states have (on average 38.0) internal successors, (380), 10 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:51,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:42:51,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2023-11-29 06:42:51,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:42:53,896 INFO L124 PetriNetUnfolderBase]: 992/1781 cut-off events. [2023-11-29 06:42:53,896 INFO L125 PetriNetUnfolderBase]: For 59/61 co-relation queries the response was YES. [2023-11-29 06:42:53,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3216 conditions, 1781 events. 992/1781 cut-off events. For 59/61 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10350 event pairs, 706 based on Foata normal form. 0/1326 useless extension candidates. Maximal degree in co-relation 3204. Up to 1337 conditions per place. [2023-11-29 06:42:53,908 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 35 selfloop transitions, 25 changer transitions 0/87 dead transitions. [2023-11-29 06:42:53,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 87 transitions, 389 flow [2023-11-29 06:42:53,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:42:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 06:42:53,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 436 transitions. [2023-11-29 06:42:53,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813333333333334 [2023-11-29 06:42:53,911 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 436 transitions. [2023-11-29 06:42:53,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 436 transitions. [2023-11-29 06:42:53,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:42:53,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 436 transitions. [2023-11-29 06:42:53,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 43.6) internal successors, (436), 10 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:53,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:53,917 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:53,917 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 191 flow. Second operand 10 states and 436 transitions. [2023-11-29 06:42:53,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 87 transitions, 389 flow [2023-11-29 06:42:53,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 87 transitions, 388 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:42:53,920 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 352 flow [2023-11-29 06:42:53,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=352, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2023-11-29 06:42:53,921 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 6 predicate places. [2023-11-29 06:42:53,922 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 352 flow [2023-11-29 06:42:53,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 38.0) internal successors, (380), 10 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:53,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:42:53,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:42:53,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-29 06:42:54,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:42:54,123 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:42:54,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:42:54,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1569596463, now seen corresponding path program 1 times [2023-11-29 06:42:54,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:42:54,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300957474] [2023-11-29 06:42:54,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:42:54,124 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:42:54,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:42:54,125 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:42:54,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-29 06:42:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:42:54,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:42:54,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:42:54,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:54,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:54,246 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 06:42:54,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-29 06:42:54,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:54,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:54,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 06:42:54,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:54,304 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 06:42:54,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2023-11-29 06:42:54,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:54,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:54,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 06:42:54,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:54,361 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 06:42:54,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-29 06:42:54,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:54,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:54,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-11-29 06:42:54,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:54,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:54,436 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 06:42:54,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 06:42:54,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:54,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:54,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:54,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2023-11-29 06:42:54,505 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:42:54,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 06:42:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:42:54,561 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:42:54,561 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:42:54,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300957474] [2023-11-29 06:42:54,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300957474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:42:54,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:42:54,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:42:54,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087192314] [2023-11-29 06:42:54,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:42:54,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:42:54,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:42:54,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:42:54,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:42:54,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2023-11-29 06:42:54,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 352 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:54,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:42:54,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2023-11-29 06:42:54,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:42:54,910 INFO L124 PetriNetUnfolderBase]: 992/1771 cut-off events. [2023-11-29 06:42:54,910 INFO L125 PetriNetUnfolderBase]: For 80/82 co-relation queries the response was YES. [2023-11-29 06:42:54,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3249 conditions, 1771 events. 992/1771 cut-off events. For 80/82 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 10256 event pairs, 706 based on Foata normal form. 43/1374 useless extension candidates. Maximal degree in co-relation 3233. Up to 1354 conditions per place. [2023-11-29 06:42:54,922 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 57 selfloop transitions, 1 changer transitions 0/85 dead transitions. [2023-11-29 06:42:54,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 85 transitions, 464 flow [2023-11-29 06:42:54,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:42:54,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:42:54,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2023-11-29 06:42:54,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2023-11-29 06:42:54,924 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 147 transitions. [2023-11-29 06:42:54,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 147 transitions. [2023-11-29 06:42:54,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:42:54,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 147 transitions. [2023-11-29 06:42:54,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:54,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:54,926 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:54,926 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 352 flow. Second operand 3 states and 147 transitions. [2023-11-29 06:42:54,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 85 transitions, 464 flow [2023-11-29 06:42:54,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 85 transitions, 400 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-11-29 06:42:54,930 INFO L231 Difference]: Finished difference. Result has 77 places, 85 transitions, 286 flow [2023-11-29 06:42:54,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=77, PETRI_TRANSITIONS=85} [2023-11-29 06:42:54,931 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2023-11-29 06:42:54,931 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 85 transitions, 286 flow [2023-11-29 06:42:54,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:54,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:42:54,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:42:54,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-29 06:42:55,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:42:55,134 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:42:55,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:42:55,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1569596462, now seen corresponding path program 1 times [2023-11-29 06:42:55,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:42:55,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459487093] [2023-11-29 06:42:55,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:42:55,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:42:55,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:42:55,135 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:42:55,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-29 06:42:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:42:55,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:42:55,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:42:55,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:55,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 06:42:55,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:55,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 06:42:55,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:55,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:55,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:55,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:42:55,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:55,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:55,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:55,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 06:42:55,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:55,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:55,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:42:55,365 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:42:55,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:55,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:55,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:55,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:42:55,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:55,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:55,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:42:55,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:55,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:55,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:55,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:42:55,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:55,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 06:42:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:42:55,525 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:42:55,525 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:42:55,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459487093] [2023-11-29 06:42:55,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459487093] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:42:55,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:42:55,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:42:55,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395906395] [2023-11-29 06:42:55,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:42:55,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:42:55,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:42:55,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:42:55,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:42:55,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2023-11-29 06:42:55,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 85 transitions, 286 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:55,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:42:55,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2023-11-29 06:42:55,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:42:55,929 INFO L124 PetriNetUnfolderBase]: 992/1761 cut-off events. [2023-11-29 06:42:55,929 INFO L125 PetriNetUnfolderBase]: For 68/70 co-relation queries the response was YES. [2023-11-29 06:42:55,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3208 conditions, 1761 events. 992/1761 cut-off events. For 68/70 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10133 event pairs, 706 based on Foata normal form. 43/1373 useless extension candidates. Maximal degree in co-relation 3193. Up to 1354 conditions per place. [2023-11-29 06:42:55,944 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 57 selfloop transitions, 1 changer transitions 0/83 dead transitions. [2023-11-29 06:42:55,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 83 transitions, 398 flow [2023-11-29 06:42:55,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:42:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:42:55,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2023-11-29 06:42:55,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2023-11-29 06:42:55,947 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 147 transitions. [2023-11-29 06:42:55,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 147 transitions. [2023-11-29 06:42:55,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:42:55,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 147 transitions. [2023-11-29 06:42:55,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:55,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:55,949 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:55,949 INFO L175 Difference]: Start difference. First operand has 77 places, 85 transitions, 286 flow. Second operand 3 states and 147 transitions. [2023-11-29 06:42:55,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 83 transitions, 398 flow [2023-11-29 06:42:55,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 83 transitions, 397 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:42:55,952 INFO L231 Difference]: Finished difference. Result has 76 places, 83 transitions, 283 flow [2023-11-29 06:42:55,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=283, PETRI_PLACES=76, PETRI_TRANSITIONS=83} [2023-11-29 06:42:55,953 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 1 predicate places. [2023-11-29 06:42:55,953 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 83 transitions, 283 flow [2023-11-29 06:42:55,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:55,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:42:55,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:42:55,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-11-29 06:42:56,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:42:56,157 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:42:56,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:42:56,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1412815894, now seen corresponding path program 1 times [2023-11-29 06:42:56,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:42:56,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699595075] [2023-11-29 06:42:56,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:42:56,157 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:42:56,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:42:56,158 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:42:56,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-29 06:42:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:42:56,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:42:56,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:42:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:42:56,267 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:42:56,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:42:56,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699595075] [2023-11-29 06:42:56,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699595075] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:42:56,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:42:56,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:42:56,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789596073] [2023-11-29 06:42:56,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:42:56,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:42:56,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:42:56,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:42:56,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:42:56,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 75 [2023-11-29 06:42:56,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 83 transitions, 283 flow. Second operand has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:56,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:42:56,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 75 [2023-11-29 06:42:56,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:42:56,940 INFO L124 PetriNetUnfolderBase]: 2173/3820 cut-off events. [2023-11-29 06:42:56,940 INFO L125 PetriNetUnfolderBase]: For 123/127 co-relation queries the response was YES. [2023-11-29 06:42:56,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6944 conditions, 3820 events. 2173/3820 cut-off events. For 123/127 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25163 event pairs, 1412 based on Foata normal form. 1/2774 useless extension candidates. Maximal degree in co-relation 6928. Up to 1734 conditions per place. [2023-11-29 06:42:56,962 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 93 selfloop transitions, 12 changer transitions 0/129 dead transitions. [2023-11-29 06:42:56,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 129 transitions, 596 flow [2023-11-29 06:42:56,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:42:56,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:42:56,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 317 transitions. [2023-11-29 06:42:56,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7044444444444444 [2023-11-29 06:42:56,965 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 317 transitions. [2023-11-29 06:42:56,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 317 transitions. [2023-11-29 06:42:56,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:42:56,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 317 transitions. [2023-11-29 06:42:56,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 52.833333333333336) internal successors, (317), 6 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:56,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:56,968 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:56,968 INFO L175 Difference]: Start difference. First operand has 76 places, 83 transitions, 283 flow. Second operand 6 states and 317 transitions. [2023-11-29 06:42:56,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 129 transitions, 596 flow [2023-11-29 06:42:56,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 129 transitions, 595 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:42:56,973 INFO L231 Difference]: Finished difference. Result has 83 places, 86 transitions, 331 flow [2023-11-29 06:42:56,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=83, PETRI_TRANSITIONS=86} [2023-11-29 06:42:56,974 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 8 predicate places. [2023-11-29 06:42:56,974 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 86 transitions, 331 flow [2023-11-29 06:42:56,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:56,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:42:56,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:42:56,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-29 06:42:57,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:42:57,175 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:42:57,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:42:57,176 INFO L85 PathProgramCache]: Analyzing trace with hash -538752184, now seen corresponding path program 1 times [2023-11-29 06:42:57,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:42:57,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995150535] [2023-11-29 06:42:57,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:42:57,177 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:42:57,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:42:57,178 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:42:57,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-29 06:42:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:42:57,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:42:57,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:42:57,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:57,303 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 06:42:57,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2023-11-29 06:42:57,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:57,315 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 06:42:57,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 06:42:57,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:57,323 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 06:42:57,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 06:42:57,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:57,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:57,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:57,358 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 06:42:57,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-29 06:42:57,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:57,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:57,376 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 06:42:57,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-29 06:42:57,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:57,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:57,394 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 06:42:57,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 06:42:57,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:57,404 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 06:42:57,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 06:42:57,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:57,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:57,423 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 06:42:57,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 06:42:57,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:57,431 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 06:42:57,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 06:42:57,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:57,441 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 06:42:57,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 06:42:57,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:57,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:57,458 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 06:42:57,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 06:42:57,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:57,465 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 06:42:57,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 06:42:57,477 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:42:57,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 06:42:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:42:57,495 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:42:57,496 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:42:57,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995150535] [2023-11-29 06:42:57,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995150535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:42:57,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:42:57,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:42:57,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779380415] [2023-11-29 06:42:57,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:42:57,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:42:57,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:42:57,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:42:57,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:42:57,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 75 [2023-11-29 06:42:57,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 86 transitions, 331 flow. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:57,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:42:57,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 75 [2023-11-29 06:42:57,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:42:57,941 INFO L124 PetriNetUnfolderBase]: 1961/3510 cut-off events. [2023-11-29 06:42:57,941 INFO L125 PetriNetUnfolderBase]: For 1062/1150 co-relation queries the response was YES. [2023-11-29 06:42:57,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7130 conditions, 3510 events. 1961/3510 cut-off events. For 1062/1150 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22890 event pairs, 1496 based on Foata normal form. 0/2687 useless extension candidates. Maximal degree in co-relation 7110. Up to 2724 conditions per place. [2023-11-29 06:42:57,958 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 62 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-11-29 06:42:57,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 84 transitions, 453 flow [2023-11-29 06:42:57,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:42:57,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:42:57,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2023-11-29 06:42:57,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6355555555555555 [2023-11-29 06:42:57,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 143 transitions. [2023-11-29 06:42:57,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 143 transitions. [2023-11-29 06:42:57,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:42:57,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 143 transitions. [2023-11-29 06:42:57,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:57,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:57,961 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:57,961 INFO L175 Difference]: Start difference. First operand has 83 places, 86 transitions, 331 flow. Second operand 3 states and 143 transitions. [2023-11-29 06:42:57,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 84 transitions, 453 flow [2023-11-29 06:42:57,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 84 transitions, 442 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 06:42:57,964 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 318 flow [2023-11-29 06:42:57,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2023-11-29 06:42:57,965 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 7 predicate places. [2023-11-29 06:42:57,965 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 318 flow [2023-11-29 06:42:57,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:57,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:42:57,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:42:57,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-11-29 06:42:58,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:42:58,166 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:42:58,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:42:58,166 INFO L85 PathProgramCache]: Analyzing trace with hash -538752183, now seen corresponding path program 1 times [2023-11-29 06:42:58,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:42:58,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216172483] [2023-11-29 06:42:58,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:42:58,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:42:58,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:42:58,168 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:42:58,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-29 06:42:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:42:58,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:42:58,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:42:58,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:58,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 06:42:58,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-29 06:42:58,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:58,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:58,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:42:58,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:58,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:58,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:42:58,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:58,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:58,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:42:58,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:58,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:58,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:42:58,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:58,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:58,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:42:58,363 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:42:58,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:58,371 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:42:58,375 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:42:58,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:58,384 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:42:58,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:58,415 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:42:58,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:58,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:58,427 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:42:58,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:58,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 06:42:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:42:58,555 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:42:58,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:42:58,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216172483] [2023-11-29 06:42:58,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216172483] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:42:58,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:42:58,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:42:58,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336878136] [2023-11-29 06:42:58,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:42:58,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:42:58,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:42:58,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:42:58,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:42:58,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2023-11-29 06:42:58,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:58,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:42:58,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2023-11-29 06:42:58,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:42:59,164 INFO L124 PetriNetUnfolderBase]: 1859/3331 cut-off events. [2023-11-29 06:42:59,164 INFO L125 PetriNetUnfolderBase]: For 1001/1093 co-relation queries the response was YES. [2023-11-29 06:42:59,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6736 conditions, 3331 events. 1859/3331 cut-off events. For 1001/1093 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 21976 event pairs, 1412 based on Foata normal form. 58/2594 useless extension candidates. Maximal degree in co-relation 6715. Up to 2564 conditions per place. [2023-11-29 06:42:59,187 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 60 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-11-29 06:42:59,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 436 flow [2023-11-29 06:42:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:42:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:42:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2023-11-29 06:42:59,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2023-11-29 06:42:59,189 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 147 transitions. [2023-11-29 06:42:59,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 147 transitions. [2023-11-29 06:42:59,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:42:59,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 147 transitions. [2023-11-29 06:42:59,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:59,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:59,191 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:59,191 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 318 flow. Second operand 3 states and 147 transitions. [2023-11-29 06:42:59,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 436 flow [2023-11-29 06:42:59,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 82 transitions, 435 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:42:59,194 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 315 flow [2023-11-29 06:42:59,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=315, PETRI_PLACES=81, PETRI_TRANSITIONS=82} [2023-11-29 06:42:59,194 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 6 predicate places. [2023-11-29 06:42:59,195 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 315 flow [2023-11-29 06:42:59,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:59,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:42:59,195 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-29 06:42:59,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-29 06:42:59,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:42:59,395 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:42:59,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:42:59,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1272976696, now seen corresponding path program 2 times [2023-11-29 06:42:59,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:42:59,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762406527] [2023-11-29 06:42:59,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:42:59,396 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:42:59,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:42:59,397 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:42:59,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-29 06:42:59,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:42:59,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:42:59,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 06:42:59,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:42:59,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 06:42:59,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:59,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:59,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:42:59,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:59,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:42:59,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:42:59,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:59,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:59,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:42:59,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:59,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:42:59,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:59,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:42:59,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:42:59,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 06:42:59,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:59,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:42:59,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:59,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:42:59,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:59,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:42:59,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:42:59,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:42:59,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:43:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:43:00,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:43:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:43:00,851 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:43:00,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762406527] [2023-11-29 06:43:00,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762406527] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:43:00,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:43:00,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 06:43:00,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470991857] [2023-11-29 06:43:00,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:43:00,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:43:00,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:43:00,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:43:00,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:43:03,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2023-11-29 06:43:03,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 315 flow. Second operand has 14 states, 14 states have (on average 38.57142857142857) internal successors, (540), 14 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:03,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:43:03,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2023-11-29 06:43:03,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:43:08,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:43:11,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:43:14,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:43:16,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:43:20,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:43:22,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:43:24,166 INFO L124 PetriNetUnfolderBase]: 1871/3367 cut-off events. [2023-11-29 06:43:24,167 INFO L125 PetriNetUnfolderBase]: For 1073/1165 co-relation queries the response was YES. [2023-11-29 06:43:24,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6865 conditions, 3367 events. 1871/3367 cut-off events. For 1073/1165 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 22345 event pairs, 1412 based on Foata normal form. 12/2578 useless extension candidates. Maximal degree in co-relation 6843. Up to 2553 conditions per place. [2023-11-29 06:43:24,190 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 37 selfloop transitions, 62 changer transitions 0/118 dead transitions. [2023-11-29 06:43:24,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 118 transitions, 693 flow [2023-11-29 06:43:24,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 06:43:24,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 06:43:24,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 922 transitions. [2023-11-29 06:43:24,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587878787878788 [2023-11-29 06:43:24,196 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 922 transitions. [2023-11-29 06:43:24,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 922 transitions. [2023-11-29 06:43:24,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:43:24,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 922 transitions. [2023-11-29 06:43:24,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 41.90909090909091) internal successors, (922), 22 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:24,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 75.0) internal successors, (1725), 23 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:24,223 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 75.0) internal successors, (1725), 23 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:24,223 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 315 flow. Second operand 22 states and 922 transitions. [2023-11-29 06:43:24,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 118 transitions, 693 flow [2023-11-29 06:43:24,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 118 transitions, 692 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:43:24,227 INFO L231 Difference]: Finished difference. Result has 107 places, 118 transitions, 676 flow [2023-11-29 06:43:24,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=676, PETRI_PLACES=107, PETRI_TRANSITIONS=118} [2023-11-29 06:43:24,228 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 32 predicate places. [2023-11-29 06:43:24,228 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 118 transitions, 676 flow [2023-11-29 06:43:24,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 38.57142857142857) internal successors, (540), 14 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:24,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:43:24,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:43:24,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-29 06:43:24,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:43:24,429 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:43:24,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:43:24,429 INFO L85 PathProgramCache]: Analyzing trace with hash 478616348, now seen corresponding path program 1 times [2023-11-29 06:43:24,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:43:24,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294614083] [2023-11-29 06:43:24,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:43:24,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:43:24,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:43:24,430 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:43:24,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-29 06:43:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:43:24,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:43:24,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:43:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:43:24,575 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:43:24,575 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:43:24,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294614083] [2023-11-29 06:43:24,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294614083] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:43:24,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:43:24,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:43:24,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714292612] [2023-11-29 06:43:24,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:43:24,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:43:24,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:43:24,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:43:24,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:43:24,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 75 [2023-11-29 06:43:24,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 118 transitions, 676 flow. Second operand has 5 states, 5 states have (on average 39.8) internal successors, (199), 5 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:24,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:43:24,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 75 [2023-11-29 06:43:24,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:43:25,098 INFO L124 PetriNetUnfolderBase]: 1417/2483 cut-off events. [2023-11-29 06:43:25,098 INFO L125 PetriNetUnfolderBase]: For 700/830 co-relation queries the response was YES. [2023-11-29 06:43:25,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5187 conditions, 2483 events. 1417/2483 cut-off events. For 700/830 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13830 event pairs, 947 based on Foata normal form. 0/1976 useless extension candidates. Maximal degree in co-relation 5158. Up to 1538 conditions per place. [2023-11-29 06:43:25,111 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 110 selfloop transitions, 18 changer transitions 0/148 dead transitions. [2023-11-29 06:43:25,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 148 transitions, 1008 flow [2023-11-29 06:43:25,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:43:25,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:43:25,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 303 transitions. [2023-11-29 06:43:25,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6733333333333333 [2023-11-29 06:43:25,113 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 303 transitions. [2023-11-29 06:43:25,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 303 transitions. [2023-11-29 06:43:25,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:43:25,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 303 transitions. [2023-11-29 06:43:25,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 50.5) internal successors, (303), 6 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:25,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:25,116 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:25,116 INFO L175 Difference]: Start difference. First operand has 107 places, 118 transitions, 676 flow. Second operand 6 states and 303 transitions. [2023-11-29 06:43:25,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 148 transitions, 1008 flow [2023-11-29 06:43:25,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 148 transitions, 850 flow, removed 47 selfloop flow, removed 9 redundant places. [2023-11-29 06:43:25,122 INFO L231 Difference]: Finished difference. Result has 105 places, 120 transitions, 570 flow [2023-11-29 06:43:25,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=570, PETRI_PLACES=105, PETRI_TRANSITIONS=120} [2023-11-29 06:43:25,122 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 30 predicate places. [2023-11-29 06:43:25,122 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 120 transitions, 570 flow [2023-11-29 06:43:25,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.8) internal successors, (199), 5 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:25,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:43:25,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:43:25,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-11-29 06:43:25,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:43:25,324 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:43:25,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:43:25,325 INFO L85 PathProgramCache]: Analyzing trace with hash -584500021, now seen corresponding path program 1 times [2023-11-29 06:43:25,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:43:25,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314992999] [2023-11-29 06:43:25,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:43:25,325 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:43:25,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:43:25,326 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:43:25,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-29 06:43:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:43:25,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:43:25,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:43:25,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-29 06:43:25,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:43:25,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:43:25,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:43:25,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:43:25,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:43:25,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:43:25,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:43:25,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:43:25,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:43:25,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:43:25,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:43:25,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:43:25,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 06:43:25,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:43:25,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:43:25,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:43:25,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:43:25,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:43:25,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:43:25,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:43:25,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:43:25,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:43:25,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:25,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:43:25,656 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-29 06:43:25,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-29 06:43:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:43:25,675 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:43:25,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:43:25,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314992999] [2023-11-29 06:43:25,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314992999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:43:25,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:43:25,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:43:25,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996530656] [2023-11-29 06:43:25,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:43:25,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:43:25,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:43:25,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:43:25,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:43:25,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 75 [2023-11-29 06:43:25,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 120 transitions, 570 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:25,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:43:25,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 75 [2023-11-29 06:43:25,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:43:26,146 INFO L124 PetriNetUnfolderBase]: 1226/2097 cut-off events. [2023-11-29 06:43:26,147 INFO L125 PetriNetUnfolderBase]: For 984/1105 co-relation queries the response was YES. [2023-11-29 06:43:26,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4805 conditions, 2097 events. 1226/2097 cut-off events. For 984/1105 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11449 event pairs, 938 based on Foata normal form. 0/1734 useless extension candidates. Maximal degree in co-relation 4774. Up to 1697 conditions per place. [2023-11-29 06:43:26,157 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 74 selfloop transitions, 24 changer transitions 0/118 dead transitions. [2023-11-29 06:43:26,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 118 transitions, 762 flow [2023-11-29 06:43:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:43:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:43:26,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 215 transitions. [2023-11-29 06:43:26,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2023-11-29 06:43:26,158 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 215 transitions. [2023-11-29 06:43:26,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 215 transitions. [2023-11-29 06:43:26,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:43:26,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 215 transitions. [2023-11-29 06:43:26,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:26,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 75.0) internal successors, (450), 6 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:26,160 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 75.0) internal successors, (450), 6 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:26,160 INFO L175 Difference]: Start difference. First operand has 105 places, 120 transitions, 570 flow. Second operand 5 states and 215 transitions. [2023-11-29 06:43:26,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 118 transitions, 762 flow [2023-11-29 06:43:26,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 118 transitions, 732 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 06:43:26,165 INFO L231 Difference]: Finished difference. Result has 104 places, 118 transitions, 584 flow [2023-11-29 06:43:26,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=584, PETRI_PLACES=104, PETRI_TRANSITIONS=118} [2023-11-29 06:43:26,166 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 29 predicate places. [2023-11-29 06:43:26,166 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 118 transitions, 584 flow [2023-11-29 06:43:26,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:26,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:43:26,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:43:26,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-11-29 06:43:26,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:43:26,367 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:43:26,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:43:26,367 INFO L85 PathProgramCache]: Analyzing trace with hash -584500020, now seen corresponding path program 1 times [2023-11-29 06:43:26,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:43:26,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843645327] [2023-11-29 06:43:26,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:43:26,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:43:26,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:43:26,368 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:43:26,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-29 06:43:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:43:26,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 06:43:26,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:43:26,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 06:43:26,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:43:26,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:43:26,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:43:26,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:26,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:43:26,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:43:26,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:43:26,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:26,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:26,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:43:26,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:43:26,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:26,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:43:26,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:43:26,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:43:26,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:26,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:26,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:43:26,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:26,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:43:26,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 06:43:26,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:43:26,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:26,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:43:26,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:43:26,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:26,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:43:26,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:43:26,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:43:26,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:26,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:26,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:43:26,950 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 06:43:26,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 06:43:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:43:27,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:43:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:43:27,682 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:43:27,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843645327] [2023-11-29 06:43:27,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843645327] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:43:27,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:43:27,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-29 06:43:27,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852699844] [2023-11-29 06:43:27,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:43:27,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:43:27,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:43:27,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:43:27,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:43:31,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 75 [2023-11-29 06:43:31,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 118 transitions, 584 flow. Second operand has 12 states, 12 states have (on average 35.666666666666664) internal successors, (428), 12 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:31,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:43:31,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 75 [2023-11-29 06:43:31,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:43:35,233 INFO L124 PetriNetUnfolderBase]: 5050/8540 cut-off events. [2023-11-29 06:43:35,233 INFO L125 PetriNetUnfolderBase]: For 2961/3496 co-relation queries the response was YES. [2023-11-29 06:43:35,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18723 conditions, 8540 events. 5050/8540 cut-off events. For 2961/3496 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 60658 event pairs, 2876 based on Foata normal form. 0/6725 useless extension candidates. Maximal degree in co-relation 18692. Up to 2101 conditions per place. [2023-11-29 06:43:35,314 INFO L140 encePairwiseOnDemand]: 64/75 looper letters, 165 selfloop transitions, 110 changer transitions 0/292 dead transitions. [2023-11-29 06:43:35,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 292 transitions, 1852 flow [2023-11-29 06:43:35,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 06:43:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 06:43:35,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 898 transitions. [2023-11-29 06:43:35,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701587301587302 [2023-11-29 06:43:35,319 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 898 transitions. [2023-11-29 06:43:35,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 898 transitions. [2023-11-29 06:43:35,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:43:35,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 898 transitions. [2023-11-29 06:43:35,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 42.76190476190476) internal successors, (898), 21 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:35,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 75.0) internal successors, (1650), 22 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:35,328 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 75.0) internal successors, (1650), 22 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:35,328 INFO L175 Difference]: Start difference. First operand has 104 places, 118 transitions, 584 flow. Second operand 21 states and 898 transitions. [2023-11-29 06:43:35,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 292 transitions, 1852 flow [2023-11-29 06:43:35,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 292 transitions, 1794 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 06:43:35,347 INFO L231 Difference]: Finished difference. Result has 123 places, 174 transitions, 1088 flow [2023-11-29 06:43:35,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1088, PETRI_PLACES=123, PETRI_TRANSITIONS=174} [2023-11-29 06:43:35,348 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 48 predicate places. [2023-11-29 06:43:35,348 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 174 transitions, 1088 flow [2023-11-29 06:43:35,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 35.666666666666664) internal successors, (428), 12 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:35,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:43:35,349 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:43:35,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-11-29 06:43:35,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:43:35,549 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:43:35,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:43:35,550 INFO L85 PathProgramCache]: Analyzing trace with hash 936214640, now seen corresponding path program 1 times [2023-11-29 06:43:35,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:43:35,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561207602] [2023-11-29 06:43:35,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:43:35,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:43:35,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:43:35,551 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:43:35,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-29 06:43:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:43:35,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:43:35,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:43:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:43:35,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:43:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:43:35,950 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:43:35,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561207602] [2023-11-29 06:43:35,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561207602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:43:35,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:43:35,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-29 06:43:35,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520785942] [2023-11-29 06:43:35,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:43:35,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:43:35,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:43:35,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:43:35,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:43:36,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 75 [2023-11-29 06:43:36,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 174 transitions, 1088 flow. Second operand has 14 states, 14 states have (on average 39.714285714285715) internal successors, (556), 14 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:36,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:43:36,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 75 [2023-11-29 06:43:36,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:43:38,944 INFO L124 PetriNetUnfolderBase]: 7319/12473 cut-off events. [2023-11-29 06:43:38,944 INFO L125 PetriNetUnfolderBase]: For 9675/10590 co-relation queries the response was YES. [2023-11-29 06:43:38,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29697 conditions, 12473 events. 7319/12473 cut-off events. For 9675/10590 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 94551 event pairs, 3873 based on Foata normal form. 644/10682 useless extension candidates. Maximal degree in co-relation 29664. Up to 3831 conditions per place. [2023-11-29 06:43:39,057 INFO L140 encePairwiseOnDemand]: 64/75 looper letters, 135 selfloop transitions, 91 changer transitions 0/245 dead transitions. [2023-11-29 06:43:39,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 245 transitions, 1620 flow [2023-11-29 06:43:39,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:43:39,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 06:43:39,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 682 transitions. [2023-11-29 06:43:39,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6495238095238095 [2023-11-29 06:43:39,062 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 682 transitions. [2023-11-29 06:43:39,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 682 transitions. [2023-11-29 06:43:39,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:43:39,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 682 transitions. [2023-11-29 06:43:39,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 48.714285714285715) internal successors, (682), 14 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:39,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:39,068 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:39,068 INFO L175 Difference]: Start difference. First operand has 123 places, 174 transitions, 1088 flow. Second operand 14 states and 682 transitions. [2023-11-29 06:43:39,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 245 transitions, 1620 flow [2023-11-29 06:43:39,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 245 transitions, 1588 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-29 06:43:39,103 INFO L231 Difference]: Finished difference. Result has 136 places, 156 transitions, 1137 flow [2023-11-29 06:43:39,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1137, PETRI_PLACES=136, PETRI_TRANSITIONS=156} [2023-11-29 06:43:39,104 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 61 predicate places. [2023-11-29 06:43:39,104 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 156 transitions, 1137 flow [2023-11-29 06:43:39,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 39.714285714285715) internal successors, (556), 14 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:39,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:43:39,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:43:39,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-11-29 06:43:39,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:43:39,305 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:43:39,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:43:39,306 INFO L85 PathProgramCache]: Analyzing trace with hash -2045293922, now seen corresponding path program 1 times [2023-11-29 06:43:39,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:43:39,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444271294] [2023-11-29 06:43:39,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:43:39,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:43:39,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:43:39,307 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:43:39,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-29 06:43:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:43:39,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:43:39,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:43:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:43:39,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:43:39,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-11-29 06:43:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:43:39,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:43:39,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444271294] [2023-11-29 06:43:39,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444271294] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:43:39,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:43:39,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-29 06:43:39,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458172514] [2023-11-29 06:43:39,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:43:39,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:43:39,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:43:39,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:43:39,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:43:40,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 75 [2023-11-29 06:43:40,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 156 transitions, 1137 flow. Second operand has 10 states, 10 states have (on average 41.1) internal successors, (411), 10 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:40,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:43:40,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 75 [2023-11-29 06:43:40,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:43:43,966 INFO L124 PetriNetUnfolderBase]: 9247/15957 cut-off events. [2023-11-29 06:43:43,966 INFO L125 PetriNetUnfolderBase]: For 30912/33218 co-relation queries the response was YES. [2023-11-29 06:43:44,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43927 conditions, 15957 events. 9247/15957 cut-off events. For 30912/33218 co-relation queries the response was YES. Maximal size of possible extension queue 842. Compared 128114 event pairs, 4035 based on Foata normal form. 0/12993 useless extension candidates. Maximal degree in co-relation 43889. Up to 6577 conditions per place. [2023-11-29 06:43:44,079 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 163 selfloop transitions, 40 changer transitions 0/223 dead transitions. [2023-11-29 06:43:44,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 223 transitions, 1883 flow [2023-11-29 06:43:44,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:43:44,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 06:43:44,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 409 transitions. [2023-11-29 06:43:44,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6816666666666666 [2023-11-29 06:43:44,082 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 409 transitions. [2023-11-29 06:43:44,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 409 transitions. [2023-11-29 06:43:44,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:43:44,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 409 transitions. [2023-11-29 06:43:44,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 51.125) internal successors, (409), 8 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:44,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 75.0) internal successors, (675), 9 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:44,084 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 75.0) internal successors, (675), 9 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:44,084 INFO L175 Difference]: Start difference. First operand has 136 places, 156 transitions, 1137 flow. Second operand 8 states and 409 transitions. [2023-11-29 06:43:44,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 223 transitions, 1883 flow [2023-11-29 06:43:44,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 223 transitions, 1784 flow, removed 16 selfloop flow, removed 10 redundant places. [2023-11-29 06:43:44,158 INFO L231 Difference]: Finished difference. Result has 135 places, 159 transitions, 1174 flow [2023-11-29 06:43:44,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1174, PETRI_PLACES=135, PETRI_TRANSITIONS=159} [2023-11-29 06:43:44,158 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 60 predicate places. [2023-11-29 06:43:44,158 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 159 transitions, 1174 flow [2023-11-29 06:43:44,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 41.1) internal successors, (411), 10 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:44,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:43:44,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:43:44,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-11-29 06:43:44,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:43:44,359 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:43:44,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:43:44,360 INFO L85 PathProgramCache]: Analyzing trace with hash -2045293924, now seen corresponding path program 1 times [2023-11-29 06:43:44,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:43:44,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169097920] [2023-11-29 06:43:44,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:43:44,360 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:43:44,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:43:44,361 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:43:44,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-29 06:43:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:43:44,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 06:43:44,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:43:44,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 06:43:44,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-29 06:43:44,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:44,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:43:44,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:44,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 06:43:44,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:43:44,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:44,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 06:43:44,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:43:44,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:44,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:43:44,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:44,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 06:43:44,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:43:44,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:44,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 06:43:44,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:43:44,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:44,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:43:44,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:44,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 06:43:44,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:43:44,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:44,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 06:43:44,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:43:44,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:44,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:43:44,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:44,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 06:43:44,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:43:44,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:44,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:43:45,005 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 06:43:45,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 06:43:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:43:45,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:43:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:43:45,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:43:45,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169097920] [2023-11-29 06:43:45,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169097920] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:43:45,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:43:45,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-29 06:43:45,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463216554] [2023-11-29 06:43:45,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:43:45,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:43:45,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:43:45,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:43:45,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:43:49,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 75 [2023-11-29 06:43:49,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 159 transitions, 1174 flow. Second operand has 12 states, 12 states have (on average 37.0) internal successors, (444), 12 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:49,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:43:49,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 75 [2023-11-29 06:43:49,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:43:54,456 INFO L124 PetriNetUnfolderBase]: 8733/14626 cut-off events. [2023-11-29 06:43:54,456 INFO L125 PetriNetUnfolderBase]: For 28959/31987 co-relation queries the response was YES. [2023-11-29 06:43:54,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43020 conditions, 14626 events. 8733/14626 cut-off events. For 28959/31987 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 110835 event pairs, 3199 based on Foata normal form. 14/12956 useless extension candidates. Maximal degree in co-relation 42981. Up to 2994 conditions per place. [2023-11-29 06:43:54,591 INFO L140 encePairwiseOnDemand]: 61/75 looper letters, 172 selfloop transitions, 102 changer transitions 0/292 dead transitions. [2023-11-29 06:43:54,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 292 transitions, 2320 flow [2023-11-29 06:43:54,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 06:43:54,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 06:43:54,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 923 transitions. [2023-11-29 06:43:54,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.586031746031746 [2023-11-29 06:43:54,595 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 923 transitions. [2023-11-29 06:43:54,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 923 transitions. [2023-11-29 06:43:54,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:43:54,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 923 transitions. [2023-11-29 06:43:54,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 43.95238095238095) internal successors, (923), 21 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:54,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 75.0) internal successors, (1650), 22 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:54,601 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 75.0) internal successors, (1650), 22 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:54,601 INFO L175 Difference]: Start difference. First operand has 135 places, 159 transitions, 1174 flow. Second operand 21 states and 923 transitions. [2023-11-29 06:43:54,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 292 transitions, 2320 flow [2023-11-29 06:43:54,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 292 transitions, 2274 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-29 06:43:54,641 INFO L231 Difference]: Finished difference. Result has 155 places, 178 transitions, 1535 flow [2023-11-29 06:43:54,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1535, PETRI_PLACES=155, PETRI_TRANSITIONS=178} [2023-11-29 06:43:54,641 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 80 predicate places. [2023-11-29 06:43:54,641 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 178 transitions, 1535 flow [2023-11-29 06:43:54,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 37.0) internal successors, (444), 12 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:54,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:43:54,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:43:54,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-11-29 06:43:54,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:43:54,842 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:43:54,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:43:54,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2045293923, now seen corresponding path program 1 times [2023-11-29 06:43:54,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:43:54,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081228457] [2023-11-29 06:43:54,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:43:54,843 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:43:54,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:43:54,844 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:43:54,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-29 06:43:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:43:54,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:43:54,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:43:54,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:43:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:43:54,975 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:43:54,976 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:43:54,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081228457] [2023-11-29 06:43:54,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081228457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:43:54,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:43:54,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:43:54,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603881771] [2023-11-29 06:43:54,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:43:54,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:43:54,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:43:54,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:43:54,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:43:55,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2023-11-29 06:43:55,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 178 transitions, 1535 flow. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:55,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:43:55,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2023-11-29 06:43:55,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:43:56,611 INFO L124 PetriNetUnfolderBase]: 6438/10906 cut-off events. [2023-11-29 06:43:56,611 INFO L125 PetriNetUnfolderBase]: For 31504/33434 co-relation queries the response was YES. [2023-11-29 06:43:56,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37187 conditions, 10906 events. 6438/10906 cut-off events. For 31504/33434 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 79701 event pairs, 5117 based on Foata normal form. 568/10838 useless extension candidates. Maximal degree in co-relation 37145. Up to 8961 conditions per place. [2023-11-29 06:43:56,690 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 134 selfloop transitions, 18 changer transitions 0/172 dead transitions. [2023-11-29 06:43:56,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 172 transitions, 1814 flow [2023-11-29 06:43:56,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:43:56,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:43:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 181 transitions. [2023-11-29 06:43:56,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2023-11-29 06:43:56,691 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 181 transitions. [2023-11-29 06:43:56,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 181 transitions. [2023-11-29 06:43:56,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:43:56,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 181 transitions. [2023-11-29 06:43:56,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:56,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:56,692 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:56,692 INFO L175 Difference]: Start difference. First operand has 155 places, 178 transitions, 1535 flow. Second operand 4 states and 181 transitions. [2023-11-29 06:43:56,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 172 transitions, 1814 flow [2023-11-29 06:43:56,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 172 transitions, 1717 flow, removed 0 selfloop flow, removed 13 redundant places. [2023-11-29 06:43:56,729 INFO L231 Difference]: Finished difference. Result has 143 places, 172 transitions, 1449 flow [2023-11-29 06:43:56,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1449, PETRI_PLACES=143, PETRI_TRANSITIONS=172} [2023-11-29 06:43:56,730 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 68 predicate places. [2023-11-29 06:43:56,730 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 172 transitions, 1449 flow [2023-11-29 06:43:56,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:56,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:43:56,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:43:56,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-11-29 06:43:56,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:43:56,931 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:43:56,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:43:56,931 INFO L85 PathProgramCache]: Analyzing trace with hash 771342940, now seen corresponding path program 1 times [2023-11-29 06:43:56,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:43:56,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769667748] [2023-11-29 06:43:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:43:56,931 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:43:56,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:43:56,932 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:43:56,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-29 06:43:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:43:57,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:43:57,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:43:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:43:57,042 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:43:57,043 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:43:57,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769667748] [2023-11-29 06:43:57,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769667748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:43:57,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:43:57,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:43:57,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737432599] [2023-11-29 06:43:57,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:43:57,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:43:57,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:43:57,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:43:57,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:43:57,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 75 [2023-11-29 06:43:57,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 172 transitions, 1449 flow. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:57,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:43:57,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 75 [2023-11-29 06:43:57,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:43:59,343 INFO L124 PetriNetUnfolderBase]: 10988/16806 cut-off events. [2023-11-29 06:43:59,343 INFO L125 PetriNetUnfolderBase]: For 47410/51355 co-relation queries the response was YES. [2023-11-29 06:43:59,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57126 conditions, 16806 events. 10988/16806 cut-off events. For 47410/51355 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 108261 event pairs, 1909 based on Foata normal form. 0/16186 useless extension candidates. Maximal degree in co-relation 57083. Up to 9398 conditions per place. [2023-11-29 06:43:59,478 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 276 selfloop transitions, 9 changer transitions 0/300 dead transitions. [2023-11-29 06:43:59,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 300 transitions, 2940 flow [2023-11-29 06:43:59,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:43:59,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:43:59,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 297 transitions. [2023-11-29 06:43:59,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2023-11-29 06:43:59,479 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 297 transitions. [2023-11-29 06:43:59,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 297 transitions. [2023-11-29 06:43:59,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:43:59,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 297 transitions. [2023-11-29 06:43:59,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 49.5) internal successors, (297), 6 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:59,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:59,481 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 75.0) internal successors, (525), 7 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:59,481 INFO L175 Difference]: Start difference. First operand has 143 places, 172 transitions, 1449 flow. Second operand 6 states and 297 transitions. [2023-11-29 06:43:59,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 300 transitions, 2940 flow [2023-11-29 06:43:59,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 300 transitions, 2921 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 06:43:59,535 INFO L231 Difference]: Finished difference. Result has 151 places, 181 transitions, 1500 flow [2023-11-29 06:43:59,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1430, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1500, PETRI_PLACES=151, PETRI_TRANSITIONS=181} [2023-11-29 06:43:59,536 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 76 predicate places. [2023-11-29 06:43:59,536 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 181 transitions, 1500 flow [2023-11-29 06:43:59,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:59,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:43:59,536 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:43:59,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-11-29 06:43:59,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:43:59,737 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:43:59,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:43:59,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1137897570, now seen corresponding path program 2 times [2023-11-29 06:43:59,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:43:59,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72608014] [2023-11-29 06:43:59,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:43:59,738 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:43:59,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:43:59,739 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:43:59,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-29 06:43:59,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:43:59,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:43:59,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 06:43:59,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:43:59,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 06:43:59,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-29 06:43:59,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:59,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:59,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 06:43:59,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:59,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:43:59,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:59,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:59,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 06:43:59,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:59,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:43:59,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:59,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:43:59,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:59,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 06:43:59,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:43:59,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:44:00,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:00,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:44:00,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:00,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:44:00,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:00,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:44:00,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:00,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:44:00,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:00,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:44:00,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:00,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:44:00,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 06:44:00,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:00,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:44:00,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:00,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:44:00,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 06:44:00,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:00,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:44:00,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:00,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:44:00,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:00,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:44:00,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:00,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:44:00,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 06:44:00,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:00,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:44:00,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:00,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:44:00,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 06:44:00,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:00,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:44:00,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:00,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:44:00,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:00,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:44:00,369 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 06:44:00,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 06:44:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 06:44:00,519 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:44:00,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:44:00,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72608014] [2023-11-29 06:44:00,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72608014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:44:00,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:44:00,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:44:00,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528295235] [2023-11-29 06:44:00,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:44:00,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:44:00,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:44:00,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:44:00,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:44:00,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 75 [2023-11-29 06:44:00,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 181 transitions, 1500 flow. Second operand has 6 states, 6 states have (on average 36.833333333333336) internal successors, (221), 6 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:00,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:44:00,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 75 [2023-11-29 06:44:00,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:44:03,731 INFO L124 PetriNetUnfolderBase]: 10756/17702 cut-off events. [2023-11-29 06:44:03,732 INFO L125 PetriNetUnfolderBase]: For 50356/50750 co-relation queries the response was YES. [2023-11-29 06:44:03,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62700 conditions, 17702 events. 10756/17702 cut-off events. For 50356/50750 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 129041 event pairs, 4197 based on Foata normal form. 448/17370 useless extension candidates. Maximal degree in co-relation 62652. Up to 8710 conditions per place. [2023-11-29 06:44:03,884 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 175 selfloop transitions, 54 changer transitions 0/255 dead transitions. [2023-11-29 06:44:03,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 255 transitions, 2446 flow [2023-11-29 06:44:03,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:44:03,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 06:44:03,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 316 transitions. [2023-11-29 06:44:03,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6019047619047619 [2023-11-29 06:44:03,885 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 316 transitions. [2023-11-29 06:44:03,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 316 transitions. [2023-11-29 06:44:03,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:44:03,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 316 transitions. [2023-11-29 06:44:03,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 45.142857142857146) internal successors, (316), 7 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:03,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:03,887 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:03,887 INFO L175 Difference]: Start difference. First operand has 151 places, 181 transitions, 1500 flow. Second operand 7 states and 316 transitions. [2023-11-29 06:44:03,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 255 transitions, 2446 flow [2023-11-29 06:44:03,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 255 transitions, 2446 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 06:44:03,976 INFO L231 Difference]: Finished difference. Result has 159 places, 192 transitions, 1752 flow [2023-11-29 06:44:03,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1752, PETRI_PLACES=159, PETRI_TRANSITIONS=192} [2023-11-29 06:44:03,976 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 84 predicate places. [2023-11-29 06:44:03,976 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 192 transitions, 1752 flow [2023-11-29 06:44:03,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 36.833333333333336) internal successors, (221), 6 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:03,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:44:03,977 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:03,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-11-29 06:44:04,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:44:04,177 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:44:04,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:04,178 INFO L85 PathProgramCache]: Analyzing trace with hash -241362991, now seen corresponding path program 2 times [2023-11-29 06:44:04,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:44:04,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429901296] [2023-11-29 06:44:04,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:44:04,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:44:04,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:44:04,179 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:44:04,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-29 06:44:04,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:44:04,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:44:04,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:44:04,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:04,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:44:04,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:44:04,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:44:04,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:04,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:44:04,343 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:44:04,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:44:04,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:04,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:44:04,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:04,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:44:04,373 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:44:04,378 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:44:04,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:44:04,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:04,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:44:04,390 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:44:04,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:44:04,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:04,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:44:04,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:04,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:44:04,423 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:44:04,430 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:44:04,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:44:04,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:04,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:44:04,442 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:44:04,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:44:04,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:04,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:44:04,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:04,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:44:04,476 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:44:04,486 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:44:04,490 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:44:04,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:04,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 06:44:04,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:04,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:44:04,553 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:44:04,557 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:44:04,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:04,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 06:44:04,632 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 06:44:04,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 06:44:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:44:04,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:44:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:44:05,532 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:44:05,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429901296] [2023-11-29 06:44:05,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429901296] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:44:05,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:44:05,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 06:44:05,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045272338] [2023-11-29 06:44:05,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:44:05,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:44:05,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:44:05,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:44:05,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:44:10,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:44:14,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:44:17,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:44:23,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:44:26,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:44:30,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:44:30,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 75 [2023-11-29 06:44:30,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 192 transitions, 1752 flow. Second operand has 14 states, 14 states have (on average 32.857142857142854) internal successors, (460), 14 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:30,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:44:30,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 75 [2023-11-29 06:44:30,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:44:36,177 INFO L124 PetriNetUnfolderBase]: 11614/19317 cut-off events. [2023-11-29 06:44:36,177 INFO L125 PetriNetUnfolderBase]: For 84031/85936 co-relation queries the response was YES. [2023-11-29 06:44:36,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78546 conditions, 19317 events. 11614/19317 cut-off events. For 84031/85936 co-relation queries the response was YES. Maximal size of possible extension queue 868. Compared 145650 event pairs, 4070 based on Foata normal form. 527/18985 useless extension candidates. Maximal degree in co-relation 78494. Up to 6907 conditions per place. [2023-11-29 06:44:36,416 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 203 selfloop transitions, 52 changer transitions 0/280 dead transitions. [2023-11-29 06:44:36,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 280 transitions, 2792 flow [2023-11-29 06:44:36,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:44:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 06:44:36,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 456 transitions. [2023-11-29 06:44:36,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527272727272727 [2023-11-29 06:44:36,418 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 456 transitions. [2023-11-29 06:44:36,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 456 transitions. [2023-11-29 06:44:36,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:44:36,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 456 transitions. [2023-11-29 06:44:36,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 41.45454545454545) internal successors, (456), 11 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:36,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 75.0) internal successors, (900), 12 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) [2023-11-29 06:44:36,422 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 75.0) internal successors, (900), 12 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) [2023-11-29 06:44:36,422 INFO L175 Difference]: Start difference. First operand has 159 places, 192 transitions, 1752 flow. Second operand 11 states and 456 transitions. [2023-11-29 06:44:36,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 280 transitions, 2792 flow [2023-11-29 06:44:36,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 280 transitions, 2706 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-29 06:44:36,722 INFO L231 Difference]: Finished difference. Result has 168 places, 197 transitions, 1885 flow [2023-11-29 06:44:36,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1670, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1885, PETRI_PLACES=168, PETRI_TRANSITIONS=197} [2023-11-29 06:44:36,723 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 93 predicate places. [2023-11-29 06:44:36,723 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 197 transitions, 1885 flow [2023-11-29 06:44:36,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 32.857142857142854) internal successors, (460), 14 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:36,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:44:36,724 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:36,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-11-29 06:44:36,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:44:36,924 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:44:36,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:36,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1995229461, now seen corresponding path program 1 times [2023-11-29 06:44:36,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:44:36,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710464131] [2023-11-29 06:44:36,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:36,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:44:36,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:44:36,926 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:44:36,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-29 06:44:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:37,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:44:37,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:37,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 06:44:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:44:37,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:44:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:44:38,044 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:44:38,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710464131] [2023-11-29 06:44:38,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710464131] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:44:38,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:44:38,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-11-29 06:44:38,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816141402] [2023-11-29 06:44:38,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:44:38,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:44:38,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:44:38,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:44:38,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:44:41,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 75 [2023-11-29 06:44:41,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 197 transitions, 1885 flow. Second operand has 16 states, 16 states have (on average 40.125) internal successors, (642), 16 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:41,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:44:41,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 75 [2023-11-29 06:44:41,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:44:49,389 INFO L124 PetriNetUnfolderBase]: 25551/41110 cut-off events. [2023-11-29 06:44:49,390 INFO L125 PetriNetUnfolderBase]: For 218037/224165 co-relation queries the response was YES. [2023-11-29 06:44:49,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170235 conditions, 41110 events. 25551/41110 cut-off events. For 218037/224165 co-relation queries the response was YES. Maximal size of possible extension queue 1395. Compared 327159 event pairs, 3324 based on Foata normal form. 1705/41048 useless extension candidates. Maximal degree in co-relation 170180. Up to 9846 conditions per place. [2023-11-29 06:44:49,921 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 408 selfloop transitions, 53 changer transitions 0/489 dead transitions. [2023-11-29 06:44:49,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 489 transitions, 5712 flow [2023-11-29 06:44:49,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:44:49,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 06:44:49,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 656 transitions. [2023-11-29 06:44:49,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6728205128205128 [2023-11-29 06:44:49,923 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 656 transitions. [2023-11-29 06:44:49,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 656 transitions. [2023-11-29 06:44:49,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:44:49,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 656 transitions. [2023-11-29 06:44:49,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 50.46153846153846) internal successors, (656), 13 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:49,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 75.0) internal successors, (1050), 14 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:49,926 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 75.0) internal successors, (1050), 14 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:49,926 INFO L175 Difference]: Start difference. First operand has 168 places, 197 transitions, 1885 flow. Second operand 13 states and 656 transitions. [2023-11-29 06:44:49,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 489 transitions, 5712 flow [2023-11-29 06:44:50,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 489 transitions, 5466 flow, removed 110 selfloop flow, removed 2 redundant places. [2023-11-29 06:44:50,675 INFO L231 Difference]: Finished difference. Result has 182 places, 216 transitions, 2194 flow [2023-11-29 06:44:50,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1837, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2194, PETRI_PLACES=182, PETRI_TRANSITIONS=216} [2023-11-29 06:44:50,675 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 107 predicate places. [2023-11-29 06:44:50,675 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 216 transitions, 2194 flow [2023-11-29 06:44:50,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 40.125) internal successors, (642), 16 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:50,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:44:50,675 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:50,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2023-11-29 06:44:50,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:44:50,876 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:44:50,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:50,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1088139517, now seen corresponding path program 1 times [2023-11-29 06:44:50,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:44:50,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1939021055] [2023-11-29 06:44:50,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:50,877 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:44:50,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:44:50,877 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:44:50,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-11-29 06:44:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:51,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:44:51,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:44:51,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:44:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:44:51,360 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:44:51,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1939021055] [2023-11-29 06:44:51,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1939021055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:44:51,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:44:51,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-29 06:44:51,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605341973] [2023-11-29 06:44:51,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:44:51,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:44:51,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:44:51,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:44:51,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:44:51,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 75 [2023-11-29 06:44:51,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 216 transitions, 2194 flow. Second operand has 14 states, 14 states have (on average 40.214285714285715) internal successors, (563), 14 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:51,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:44:51,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 75 [2023-11-29 06:44:51,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:44:56,797 INFO L124 PetriNetUnfolderBase]: 17397/27359 cut-off events. [2023-11-29 06:44:56,797 INFO L125 PetriNetUnfolderBase]: For 155094/163053 co-relation queries the response was YES. [2023-11-29 06:44:57,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119602 conditions, 27359 events. 17397/27359 cut-off events. For 155094/163053 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 192400 event pairs, 10351 based on Foata normal form. 488/26135 useless extension candidates. Maximal degree in co-relation 119542. Up to 18823 conditions per place. [2023-11-29 06:44:57,145 INFO L140 encePairwiseOnDemand]: 64/75 looper letters, 173 selfloop transitions, 91 changer transitions 0/292 dead transitions. [2023-11-29 06:44:57,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 292 transitions, 3125 flow [2023-11-29 06:44:57,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:44:57,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 06:44:57,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 654 transitions. [2023-11-29 06:44:57,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6228571428571429 [2023-11-29 06:44:57,147 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 654 transitions. [2023-11-29 06:44:57,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 654 transitions. [2023-11-29 06:44:57,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:44:57,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 654 transitions. [2023-11-29 06:44:57,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 46.714285714285715) internal successors, (654), 14 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:57,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:57,149 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:57,149 INFO L175 Difference]: Start difference. First operand has 182 places, 216 transitions, 2194 flow. Second operand 14 states and 654 transitions. [2023-11-29 06:44:57,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 292 transitions, 3125 flow [2023-11-29 06:44:57,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 292 transitions, 3080 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-11-29 06:44:57,586 INFO L231 Difference]: Finished difference. Result has 195 places, 211 transitions, 2293 flow [2023-11-29 06:44:57,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2027, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2293, PETRI_PLACES=195, PETRI_TRANSITIONS=211} [2023-11-29 06:44:57,586 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 120 predicate places. [2023-11-29 06:44:57,587 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 211 transitions, 2293 flow [2023-11-29 06:44:57,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 40.214285714285715) internal successors, (563), 14 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:57,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:44:57,587 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:57,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-11-29 06:44:57,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:44:57,787 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:44:57,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:57,788 INFO L85 PathProgramCache]: Analyzing trace with hash -21582283, now seen corresponding path program 3 times [2023-11-29 06:44:57,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:44:57,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853911702] [2023-11-29 06:44:57,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:44:57,788 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:44:57,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:44:57,789 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:44:57,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-11-29 06:44:57,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:44:57,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:44:57,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 06:44:57,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:57,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 06:44:57,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:44:57,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:44:57,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:57,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:44:58,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:44:58,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:44:58,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:44:58,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:44:58,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:44:58,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:44:58,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:44:58,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:44:58,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:44:58,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:44:58,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:44:58,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:44:58,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:44:58,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:44:58,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:44:58,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:44:58,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:44:58,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 06:44:58,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:44:58,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:44:58,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:44:58,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:44:58,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:44:58,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:44:58,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:44:58,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:44:58,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:44:58,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:44:58,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:44:58,375 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 06:44:58,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 06:44:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 06:44:58,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:44:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 06:44:59,675 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:44:59,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853911702] [2023-11-29 06:44:59,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853911702] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:44:59,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:44:59,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 06:44:59,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945615554] [2023-11-29 06:44:59,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:44:59,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:44:59,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:44:59,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:44:59,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:45:04,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 75 [2023-11-29 06:45:04,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 211 transitions, 2293 flow. Second operand has 14 states, 14 states have (on average 37.142857142857146) internal successors, (520), 14 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:04,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:45:04,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 75 [2023-11-29 06:45:04,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:45:17,483 INFO L124 PetriNetUnfolderBase]: 31346/46915 cut-off events. [2023-11-29 06:45:17,483 INFO L125 PetriNetUnfolderBase]: For 278848/281706 co-relation queries the response was YES. [2023-11-29 06:45:17,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214697 conditions, 46915 events. 31346/46915 cut-off events. For 278848/281706 co-relation queries the response was YES. Maximal size of possible extension queue 1281. Compared 337736 event pairs, 5560 based on Foata normal form. 3367/48322 useless extension candidates. Maximal degree in co-relation 214634. Up to 12282 conditions per place. [2023-11-29 06:45:18,173 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 622 selfloop transitions, 73 changer transitions 0/725 dead transitions. [2023-11-29 06:45:18,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 725 transitions, 8356 flow [2023-11-29 06:45:18,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:45:18,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 06:45:18,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 898 transitions. [2023-11-29 06:45:18,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6651851851851852 [2023-11-29 06:45:18,176 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 898 transitions. [2023-11-29 06:45:18,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 898 transitions. [2023-11-29 06:45:18,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:45:18,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 898 transitions. [2023-11-29 06:45:18,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 49.888888888888886) internal successors, (898), 18 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:18,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 75.0) internal successors, (1425), 19 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:18,179 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 75.0) internal successors, (1425), 19 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:18,179 INFO L175 Difference]: Start difference. First operand has 195 places, 211 transitions, 2293 flow. Second operand 18 states and 898 transitions. [2023-11-29 06:45:18,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 725 transitions, 8356 flow [2023-11-29 06:45:19,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 725 transitions, 8175 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-11-29 06:45:19,031 INFO L231 Difference]: Finished difference. Result has 206 places, 225 transitions, 2446 flow [2023-11-29 06:45:19,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2128, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2446, PETRI_PLACES=206, PETRI_TRANSITIONS=225} [2023-11-29 06:45:19,032 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 131 predicate places. [2023-11-29 06:45:19,032 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 225 transitions, 2446 flow [2023-11-29 06:45:19,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 37.142857142857146) internal successors, (520), 14 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:19,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:45:19,032 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:45:19,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2023-11-29 06:45:19,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:45:19,233 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:45:19,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:45:19,233 INFO L85 PathProgramCache]: Analyzing trace with hash -2072975546, now seen corresponding path program 2 times [2023-11-29 06:45:19,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:45:19,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130428340] [2023-11-29 06:45:19,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:45:19,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:45:19,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:45:19,235 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:45:19,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-11-29 06:45:19,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:45:19,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:45:19,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 06:45:19,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:45:19,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 06:45:19,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-29 06:45:19,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:45:19,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:45:19,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:45:19,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:45:19,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:45:19,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:45:19,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:45:19,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:45:19,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:45:19,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:45:19,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:45:19,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 06:45:19,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:45:19,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:45:19,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:45:19,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:45:19,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:45:19,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:45:19,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:45:19,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:45:19,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:45:19,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:45:19,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:45:19,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:45:19,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:45:19,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:45:19,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:45:19,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:45:19,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:45:19,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:19,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:45:19,851 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 06:45:19,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 06:45:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 06:45:19,992 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:45:19,992 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:45:19,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130428340] [2023-11-29 06:45:19,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130428340] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:45:19,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:45:19,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:45:19,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410923640] [2023-11-29 06:45:19,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:45:19,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:45:19,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:45:19,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:45:19,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:45:20,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 75 [2023-11-29 06:45:20,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 225 transitions, 2446 flow. Second operand has 6 states, 6 states have (on average 38.166666666666664) internal successors, (229), 6 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:20,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:45:20,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 75 [2023-11-29 06:45:20,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:45:28,090 INFO L124 PetriNetUnfolderBase]: 27650/42088 cut-off events. [2023-11-29 06:45:28,090 INFO L125 PetriNetUnfolderBase]: For 349979/359054 co-relation queries the response was YES. [2023-11-29 06:45:28,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217273 conditions, 42088 events. 27650/42088 cut-off events. For 349979/359054 co-relation queries the response was YES. Maximal size of possible extension queue 1125. Compared 301859 event pairs, 16445 based on Foata normal form. 304/39760 useless extension candidates. Maximal degree in co-relation 217206. Up to 32114 conditions per place. [2023-11-29 06:45:28,899 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 209 selfloop transitions, 57 changer transitions 0/300 dead transitions. [2023-11-29 06:45:28,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 300 transitions, 3910 flow [2023-11-29 06:45:28,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:45:28,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 06:45:28,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 312 transitions. [2023-11-29 06:45:28,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942857142857143 [2023-11-29 06:45:28,901 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 312 transitions. [2023-11-29 06:45:28,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 312 transitions. [2023-11-29 06:45:28,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:45:28,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 312 transitions. [2023-11-29 06:45:28,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 44.57142857142857) internal successors, (312), 7 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:28,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:28,902 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:28,903 INFO L175 Difference]: Start difference. First operand has 206 places, 225 transitions, 2446 flow. Second operand 7 states and 312 transitions. [2023-11-29 06:45:28,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 300 transitions, 3910 flow [2023-11-29 06:45:29,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 300 transitions, 3509 flow, removed 147 selfloop flow, removed 5 redundant places. [2023-11-29 06:45:29,717 INFO L231 Difference]: Finished difference. Result has 209 places, 237 transitions, 2559 flow [2023-11-29 06:45:29,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2559, PETRI_PLACES=209, PETRI_TRANSITIONS=237} [2023-11-29 06:45:29,717 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 134 predicate places. [2023-11-29 06:45:29,717 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 237 transitions, 2559 flow [2023-11-29 06:45:29,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.166666666666664) internal successors, (229), 6 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:29,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:45:29,717 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:45:29,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2023-11-29 06:45:29,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:45:29,918 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:45:29,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:45:29,918 INFO L85 PathProgramCache]: Analyzing trace with hash 536947778, now seen corresponding path program 2 times [2023-11-29 06:45:29,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:45:29,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1710453454] [2023-11-29 06:45:29,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:45:29,919 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:45:29,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:45:29,919 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:45:29,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-11-29 06:45:30,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:45:30,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:45:30,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:45:30,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:45:30,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:45:30,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:45:30,087 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:45:30,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:30,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:45:30,094 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:45:30,098 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:45:30,103 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:45:30,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:30,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:45:30,112 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:45:30,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:30,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:45:30,121 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:45:30,127 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:45:30,131 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:45:30,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:30,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 06:45:30,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:30,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:45:30,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:30,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:45:30,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:30,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:45:30,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:30,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:45:30,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:30,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 06:45:30,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:30,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:45:30,241 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:45:30,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:30,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:45:30,249 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:45:30,253 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:45:30,257 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:45:30,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:45:30,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 06:45:30,317 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 06:45:30,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 06:45:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:45:30,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:45:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:45:31,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:45:31,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1710453454] [2023-11-29 06:45:31,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1710453454] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:45:31,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:45:31,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 06:45:31,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000783522] [2023-11-29 06:45:31,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:45:31,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:45:31,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:45:31,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:45:31,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:45:35,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:45:39,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:45:44,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:45:52,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:45:53,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 75 [2023-11-29 06:45:53,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 237 transitions, 2559 flow. Second operand has 14 states, 14 states have (on average 35.42857142857143) internal successors, (496), 14 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:53,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:45:53,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 75 [2023-11-29 06:45:53,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:46:03,531 INFO L124 PetriNetUnfolderBase]: 27154/42509 cut-off events. [2023-11-29 06:46:03,531 INFO L125 PetriNetUnfolderBase]: For 251149/256976 co-relation queries the response was YES. [2023-11-29 06:46:03,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190584 conditions, 42509 events. 27154/42509 cut-off events. For 251149/256976 co-relation queries the response was YES. Maximal size of possible extension queue 1147. Compared 314945 event pairs, 8121 based on Foata normal form. 1283/41699 useless extension candidates. Maximal degree in co-relation 190515. Up to 15078 conditions per place. [2023-11-29 06:46:04,189 INFO L140 encePairwiseOnDemand]: 64/75 looper letters, 271 selfloop transitions, 72 changer transitions 0/376 dead transitions. [2023-11-29 06:46:04,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 376 transitions, 4359 flow [2023-11-29 06:46:04,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:46:04,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 06:46:04,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 559 transitions. [2023-11-29 06:46:04,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2023-11-29 06:46:04,192 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 559 transitions. [2023-11-29 06:46:04,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 559 transitions. [2023-11-29 06:46:04,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:46:04,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 559 transitions. [2023-11-29 06:46:04,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 43.0) internal successors, (559), 13 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:46:04,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 75.0) internal successors, (1050), 14 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:46:04,194 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 75.0) internal successors, (1050), 14 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:46:04,194 INFO L175 Difference]: Start difference. First operand has 209 places, 237 transitions, 2559 flow. Second operand 13 states and 559 transitions. [2023-11-29 06:46:04,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 376 transitions, 4359 flow [2023-11-29 06:46:05,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 376 transitions, 4264 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-29 06:46:05,090 INFO L231 Difference]: Finished difference. Result has 220 places, 246 transitions, 2806 flow [2023-11-29 06:46:05,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2466, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2806, PETRI_PLACES=220, PETRI_TRANSITIONS=246} [2023-11-29 06:46:05,091 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 145 predicate places. [2023-11-29 06:46:05,091 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 246 transitions, 2806 flow [2023-11-29 06:46:05,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 35.42857142857143) internal successors, (496), 14 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:46:05,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:46:05,091 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2023-11-29 06:46:05,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2023-11-29 06:46:05,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:46:05,291 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:46:05,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:46:05,292 INFO L85 PathProgramCache]: Analyzing trace with hash -525629796, now seen corresponding path program 3 times [2023-11-29 06:46:05,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:46:05,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536596616] [2023-11-29 06:46:05,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:46:05,292 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:46:05,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:46:05,293 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:46:05,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-11-29 06:46:05,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 06:46:05,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:46:05,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 06:46:05,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:46:05,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 06:46:05,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 06:46:05,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:46:05,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:46:05,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:46:05,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:46:05,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:46:05,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:46:05,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:46:05,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:46:05,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:46:05,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:46:05,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:46:05,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:46:05,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:46:05,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:46:05,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:46:05,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:46:05,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:46:05,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:46:05,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:46:05,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:46:05,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:46:05,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:46:05,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:46:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:46:06,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:46:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:46:09,027 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:46:09,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536596616] [2023-11-29 06:46:09,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536596616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:46:09,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:46:09,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-11-29 06:46:09,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464283345] [2023-11-29 06:46:09,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:46:09,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 06:46:09,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:46:09,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 06:46:09,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2023-11-29 06:46:21,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2023-11-29 06:46:21,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 246 transitions, 2806 flow. Second operand has 26 states, 26 states have (on average 38.76923076923077) internal successors, (1008), 26 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:46:21,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:46:21,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2023-11-29 06:46:21,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:46:48,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:46:51,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:46:55,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:46:59,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:47:03,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:47:05,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:47:09,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:47:13,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:47:17,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:47:21,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:47:26,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:47:29,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:47:33,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:47:44,903 INFO L124 PetriNetUnfolderBase]: 26028/41332 cut-off events. [2023-11-29 06:47:44,903 INFO L125 PetriNetUnfolderBase]: For 300230/307028 co-relation queries the response was YES. [2023-11-29 06:47:45,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197276 conditions, 41332 events. 26028/41332 cut-off events. For 300230/307028 co-relation queries the response was YES. Maximal size of possible extension queue 1000. Compared 309253 event pairs, 16221 based on Foata normal form. 49/37706 useless extension candidates. Maximal degree in co-relation 197203. Up to 33258 conditions per place. [2023-11-29 06:47:45,769 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 125 selfloop transitions, 150 changer transitions 0/313 dead transitions. [2023-11-29 06:47:45,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 313 transitions, 4164 flow [2023-11-29 06:47:45,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 06:47:45,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-29 06:47:45,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2052 transitions. [2023-11-29 06:47:45,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364705882352941 [2023-11-29 06:47:45,774 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2052 transitions. [2023-11-29 06:47:45,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2052 transitions. [2023-11-29 06:47:45,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:47:45,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2052 transitions. [2023-11-29 06:47:45,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 40.23529411764706) internal successors, (2052), 51 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:47:45,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 75.0) internal successors, (3900), 52 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:47:45,782 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 75.0) internal successors, (3900), 52 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:47:45,783 INFO L175 Difference]: Start difference. First operand has 220 places, 246 transitions, 2806 flow. Second operand 51 states and 2052 transitions. [2023-11-29 06:47:45,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 313 transitions, 4164 flow [2023-11-29 06:47:46,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 313 transitions, 4069 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-11-29 06:47:46,646 INFO L231 Difference]: Finished difference. Result has 276 places, 312 transitions, 3893 flow [2023-11-29 06:47:46,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2741, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=3893, PETRI_PLACES=276, PETRI_TRANSITIONS=312} [2023-11-29 06:47:46,647 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 201 predicate places. [2023-11-29 06:47:46,647 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 312 transitions, 3893 flow [2023-11-29 06:47:46,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 38.76923076923077) internal successors, (1008), 26 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:47:46,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:47:46,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:47:46,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2023-11-29 06:47:46,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:47:46,848 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:47:46,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:47:46,848 INFO L85 PathProgramCache]: Analyzing trace with hash -730454939, now seen corresponding path program 1 times [2023-11-29 06:47:46,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:47:46,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362552486] [2023-11-29 06:47:46,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:47:46,849 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:47:46,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:47:46,849 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:47:46,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-11-29 06:47:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:47:46,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:47:46,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:47:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:47:47,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:47:47,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:47:47,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362552486] [2023-11-29 06:47:47,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362552486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:47:47,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:47:47,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:47:47,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843327572] [2023-11-29 06:47:47,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:47:47,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:47:47,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:47:47,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:47:47,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:47:47,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 75 [2023-11-29 06:47:47,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 312 transitions, 3893 flow. Second operand has 6 states, 6 states have (on average 37.333333333333336) internal successors, (224), 6 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:47:47,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:47:47,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 75 [2023-11-29 06:47:47,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:48:00,477 INFO L124 PetriNetUnfolderBase]: 44673/65390 cut-off events. [2023-11-29 06:48:00,477 INFO L125 PetriNetUnfolderBase]: For 479289/493446 co-relation queries the response was YES. [2023-11-29 06:48:01,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315594 conditions, 65390 events. 44673/65390 cut-off events. For 479289/493446 co-relation queries the response was YES. Maximal size of possible extension queue 1241. Compared 440630 event pairs, 7617 based on Foata normal form. 1975/64696 useless extension candidates. Maximal degree in co-relation 315507. Up to 32191 conditions per place. [2023-11-29 06:48:01,707 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 559 selfloop transitions, 73 changer transitions 0/659 dead transitions. [2023-11-29 06:48:01,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 659 transitions, 9285 flow [2023-11-29 06:48:01,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:48:01,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 06:48:01,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 431 transitions. [2023-11-29 06:48:01,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6385185185185185 [2023-11-29 06:48:01,710 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 431 transitions. [2023-11-29 06:48:01,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 431 transitions. [2023-11-29 06:48:01,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:48:01,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 431 transitions. [2023-11-29 06:48:01,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 47.888888888888886) internal successors, (431), 9 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:01,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:01,712 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:01,712 INFO L175 Difference]: Start difference. First operand has 276 places, 312 transitions, 3893 flow. Second operand 9 states and 431 transitions. [2023-11-29 06:48:01,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 659 transitions, 9285 flow [2023-11-29 06:48:03,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 659 transitions, 8923 flow, removed 83 selfloop flow, removed 21 redundant places. [2023-11-29 06:48:03,527 INFO L231 Difference]: Finished difference. Result has 267 places, 363 transitions, 4486 flow [2023-11-29 06:48:03,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=3531, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4486, PETRI_PLACES=267, PETRI_TRANSITIONS=363} [2023-11-29 06:48:03,527 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 192 predicate places. [2023-11-29 06:48:03,528 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 363 transitions, 4486 flow [2023-11-29 06:48:03,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 37.333333333333336) internal successors, (224), 6 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:03,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:48:03,528 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:03,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2023-11-29 06:48:03,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:48:03,728 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:48:03,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:03,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1470566999, now seen corresponding path program 3 times [2023-11-29 06:48:03,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:48:03,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743104900] [2023-11-29 06:48:03,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:48:03,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:48:03,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:48:03,730 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:48:03,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-11-29 06:48:03,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:48:03,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:48:03,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 06:48:03,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:03,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:48:03,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 06:48:03,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:03,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:03,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:48:03,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:03,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:48:04,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:04,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:04,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:48:04,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:48:04,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:48:04,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:04,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:48:04,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:48:04,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:04,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:04,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:48:04,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 06:48:04,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:48:04,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:04,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:48:04,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:04,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:48:04,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:48:04,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:48:04,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:04,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 06:48:04,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:48:04,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:04,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:04,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:48:04,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:04,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:48:04,375 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 06:48:04,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 06:48:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 06:48:04,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 06:48:06,216 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:48:06,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743104900] [2023-11-29 06:48:06,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743104900] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:06,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:48:06,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2023-11-29 06:48:06,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127347452] [2023-11-29 06:48:06,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:06,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:48:06,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:48:06,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:48:06,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:48:12,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 75 [2023-11-29 06:48:12,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 363 transitions, 4486 flow. Second operand has 16 states, 16 states have (on average 38.375) internal successors, (614), 16 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:12,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:48:12,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 75 [2023-11-29 06:48:12,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:48:31,878 INFO L124 PetriNetUnfolderBase]: 38116/59377 cut-off events. [2023-11-29 06:48:31,879 INFO L125 PetriNetUnfolderBase]: For 452811/462748 co-relation queries the response was YES. [2023-11-29 06:48:32,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301870 conditions, 59377 events. 38116/59377 cut-off events. For 452811/462748 co-relation queries the response was YES. Maximal size of possible extension queue 1233. Compared 444644 event pairs, 4655 based on Foata normal form. 2163/57676 useless extension candidates. Maximal degree in co-relation 301779. Up to 16831 conditions per place. [2023-11-29 06:48:33,262 INFO L140 encePairwiseOnDemand]: 64/75 looper letters, 581 selfloop transitions, 143 changer transitions 0/770 dead transitions. [2023-11-29 06:48:33,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 770 transitions, 9717 flow [2023-11-29 06:48:33,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:48:33,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 06:48:33,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 860 transitions. [2023-11-29 06:48:33,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2023-11-29 06:48:33,264 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 860 transitions. [2023-11-29 06:48:33,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 860 transitions. [2023-11-29 06:48:33,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:48:33,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 860 transitions. [2023-11-29 06:48:33,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 47.77777777777778) internal successors, (860), 18 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:33,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 75.0) internal successors, (1425), 19 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:33,267 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 75.0) internal successors, (1425), 19 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:33,267 INFO L175 Difference]: Start difference. First operand has 267 places, 363 transitions, 4486 flow. Second operand 18 states and 860 transitions. [2023-11-29 06:48:33,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 770 transitions, 9717 flow [2023-11-29 06:48:35,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 770 transitions, 9693 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-11-29 06:48:35,171 INFO L231 Difference]: Finished difference. Result has 289 places, 379 transitions, 5102 flow [2023-11-29 06:48:35,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=4482, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5102, PETRI_PLACES=289, PETRI_TRANSITIONS=379} [2023-11-29 06:48:35,172 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 214 predicate places. [2023-11-29 06:48:35,172 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 379 transitions, 5102 flow [2023-11-29 06:48:35,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 38.375) internal successors, (614), 16 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:35,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:48:35,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:35,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2023-11-29 06:48:35,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:48:35,372 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:48:35,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:35,373 INFO L85 PathProgramCache]: Analyzing trace with hash -220684532, now seen corresponding path program 1 times [2023-11-29 06:48:35,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:48:35,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048826612] [2023-11-29 06:48:35,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:35,373 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:48:35,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:48:35,374 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:48:35,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-11-29 06:48:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:35,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:48:35,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:35,677 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:48:35,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:48:35,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048826612] [2023-11-29 06:48:35,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048826612] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:48:35,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:48:35,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:48:35,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740254456] [2023-11-29 06:48:35,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:48:35,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:48:35,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:48:35,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:48:35,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:48:35,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 75 [2023-11-29 06:48:35,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 379 transitions, 5102 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:35,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:48:35,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 75 [2023-11-29 06:48:35,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:48:51,156 INFO L124 PetriNetUnfolderBase]: 37465/62023 cut-off events. [2023-11-29 06:48:51,156 INFO L125 PetriNetUnfolderBase]: For 824834/838952 co-relation queries the response was YES. [2023-11-29 06:48:52,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340590 conditions, 62023 events. 37465/62023 cut-off events. For 824834/838952 co-relation queries the response was YES. Maximal size of possible extension queue 1581. Compared 522253 event pairs, 2389 based on Foata normal form. 3865/63347 useless extension candidates. Maximal degree in co-relation 340492. Up to 38870 conditions per place. [2023-11-29 06:48:52,569 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 522 selfloop transitions, 21 changer transitions 65/662 dead transitions. [2023-11-29 06:48:52,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 662 transitions, 11319 flow [2023-11-29 06:48:52,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:48:52,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:48:52,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 278 transitions. [2023-11-29 06:48:52,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7413333333333333 [2023-11-29 06:48:52,571 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 278 transitions. [2023-11-29 06:48:52,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 278 transitions. [2023-11-29 06:48:52,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:48:52,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 278 transitions. [2023-11-29 06:48:52,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:52,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 75.0) internal successors, (450), 6 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:52,572 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 75.0) internal successors, (450), 6 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:52,572 INFO L175 Difference]: Start difference. First operand has 289 places, 379 transitions, 5102 flow. Second operand 5 states and 278 transitions. [2023-11-29 06:48:52,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 662 transitions, 11319 flow [2023-11-29 06:48:55,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 662 transitions, 10812 flow, removed 63 selfloop flow, removed 10 redundant places. [2023-11-29 06:48:55,280 INFO L231 Difference]: Finished difference. Result has 286 places, 360 transitions, 4550 flow [2023-11-29 06:48:55,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=4878, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4550, PETRI_PLACES=286, PETRI_TRANSITIONS=360} [2023-11-29 06:48:55,281 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 211 predicate places. [2023-11-29 06:48:55,281 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 360 transitions, 4550 flow [2023-11-29 06:48:55,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:55,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:48:55,281 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:55,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2023-11-29 06:48:55,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:48:55,482 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:48:55,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:55,482 INFO L85 PathProgramCache]: Analyzing trace with hash -628937275, now seen corresponding path program 4 times [2023-11-29 06:48:55,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:48:55,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314760378] [2023-11-29 06:48:55,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:48:55,482 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:48:55,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:48:55,483 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:48:55,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-11-29 06:48:55,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:48:55,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:48:55,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 06:48:55,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:55,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 06:48:55,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:48:55,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:48:55,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:55,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:55,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:48:55,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:55,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:48:55,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:48:55,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:55,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:55,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:48:55,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:55,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:48:55,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:48:55,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:55,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:48:55,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:55,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:48:55,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:55,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 06:48:55,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:48:55,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:48:55,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:48:55,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:48:56,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 06:48:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 06:48:56,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 06:48:56,624 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:48:56,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314760378] [2023-11-29 06:48:56,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314760378] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:56,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:48:56,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-29 06:48:56,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605118967] [2023-11-29 06:48:56,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:56,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:48:56,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:48:56,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:48:56,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:48:58,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 75 [2023-11-29 06:48:58,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 360 transitions, 4550 flow. Second operand has 16 states, 16 states have (on average 38.125) internal successors, (610), 16 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:58,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:48:58,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 75 [2023-11-29 06:48:58,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:49:25,348 INFO L124 PetriNetUnfolderBase]: 68078/107530 cut-off events. [2023-11-29 06:49:25,348 INFO L125 PetriNetUnfolderBase]: For 1283998/1294815 co-relation queries the response was YES. [2023-11-29 06:49:27,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563302 conditions, 107530 events. 68078/107530 cut-off events. For 1283998/1294815 co-relation queries the response was YES. Maximal size of possible extension queue 2234. Compared 887218 event pairs, 36247 based on Foata normal form. 7159/111086 useless extension candidates. Maximal degree in co-relation 563201. Up to 61281 conditions per place. [2023-11-29 06:49:28,283 INFO L140 encePairwiseOnDemand]: 64/75 looper letters, 537 selfloop transitions, 160 changer transitions 0/741 dead transitions. [2023-11-29 06:49:28,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 741 transitions, 11402 flow [2023-11-29 06:49:28,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:49:28,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 06:49:28,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 828 transitions. [2023-11-29 06:49:28,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2023-11-29 06:49:28,285 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 828 transitions. [2023-11-29 06:49:28,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 828 transitions. [2023-11-29 06:49:28,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:49:28,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 828 transitions. [2023-11-29 06:49:28,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 46.0) internal successors, (828), 18 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:28,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 75.0) internal successors, (1425), 19 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:28,288 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 75.0) internal successors, (1425), 19 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:28,288 INFO L175 Difference]: Start difference. First operand has 286 places, 360 transitions, 4550 flow. Second operand 18 states and 828 transitions. [2023-11-29 06:49:28,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 741 transitions, 11402 flow [2023-11-29 06:49:34,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 741 transitions, 10599 flow, removed 66 selfloop flow, removed 10 redundant places. [2023-11-29 06:49:34,623 INFO L231 Difference]: Finished difference. Result has 293 places, 376 transitions, 4873 flow [2023-11-29 06:49:34,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=4260, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4873, PETRI_PLACES=293, PETRI_TRANSITIONS=376} [2023-11-29 06:49:34,624 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 218 predicate places. [2023-11-29 06:49:34,624 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 376 transitions, 4873 flow [2023-11-29 06:49:34,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 38.125) internal successors, (610), 16 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:34,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:49:34,624 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:49:34,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2023-11-29 06:49:34,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:49:34,825 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:49:34,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:49:34,825 INFO L85 PathProgramCache]: Analyzing trace with hash -394793693, now seen corresponding path program 1 times [2023-11-29 06:49:34,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:49:34,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133752561] [2023-11-29 06:49:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:34,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:49:34,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:49:34,826 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:49:34,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-11-29 06:49:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:34,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:49:34,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:49:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 06:49:35,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:49:35,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-11-29 06:49:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 06:49:35,651 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:49:35,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133752561] [2023-11-29 06:49:35,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133752561] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:49:35,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:49:35,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-29 06:49:35,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97213413] [2023-11-29 06:49:35,651 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:49:35,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:49:35,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:49:35,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:49:35,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:49:37,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 75 [2023-11-29 06:49:37,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 376 transitions, 4873 flow. Second operand has 14 states, 14 states have (on average 41.357142857142854) internal successors, (579), 14 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:37,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:49:37,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 75 [2023-11-29 06:49:37,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:50:19,926 INFO L124 PetriNetUnfolderBase]: 96859/164574 cut-off events. [2023-11-29 06:50:19,926 INFO L125 PetriNetUnfolderBase]: For 1615333/1634900 co-relation queries the response was YES. [2023-11-29 06:50:23,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 860903 conditions, 164574 events. 96859/164574 cut-off events. For 1615333/1634900 co-relation queries the response was YES. Maximal size of possible extension queue 4099. Compared 1607096 event pairs, 6517 based on Foata normal form. 5561/162725 useless extension candidates. Maximal degree in co-relation 860804. Up to 41589 conditions per place. [2023-11-29 06:50:24,319 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 1012 selfloop transitions, 181 changer transitions 0/1247 dead transitions. [2023-11-29 06:50:24,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1247 transitions, 18247 flow [2023-11-29 06:50:24,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 06:50:24,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 06:50:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1146 transitions. [2023-11-29 06:50:24,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6643478260869565 [2023-11-29 06:50:24,323 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1146 transitions. [2023-11-29 06:50:24,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1146 transitions. [2023-11-29 06:50:24,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:50:24,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1146 transitions. [2023-11-29 06:50:24,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 49.82608695652174) internal successors, (1146), 23 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:50:24,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 75.0) internal successors, (1800), 24 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:50:24,326 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 75.0) internal successors, (1800), 24 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:50:24,326 INFO L175 Difference]: Start difference. First operand has 293 places, 376 transitions, 4873 flow. Second operand 23 states and 1146 transitions. [2023-11-29 06:50:24,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1247 transitions, 18247 flow [2023-11-29 06:50:40,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 1247 transitions, 17668 flow, removed 106 selfloop flow, removed 7 redundant places. [2023-11-29 06:50:40,261 INFO L231 Difference]: Finished difference. Result has 321 places, 462 transitions, 6328 flow [2023-11-29 06:50:40,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=4602, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6328, PETRI_PLACES=321, PETRI_TRANSITIONS=462} [2023-11-29 06:50:40,262 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 246 predicate places. [2023-11-29 06:50:40,262 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 462 transitions, 6328 flow [2023-11-29 06:50:40,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 41.357142857142854) internal successors, (579), 14 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:50:40,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:50:40,263 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:50:40,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2023-11-29 06:50:40,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:50:40,463 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-11-29 06:50:40,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:40,463 INFO L85 PathProgramCache]: Analyzing trace with hash 737566047, now seen corresponding path program 2 times [2023-11-29 06:50:40,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:50:40,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010477180] [2023-11-29 06:50:40,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:50:40,464 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:50:40,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:50:40,465 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:50:40,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853a8b4a-f129-4644-b4b6-133c67ff89e2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2023-11-29 06:50:40,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:50:40,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:50:40,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 06:50:40,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:50:40,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 06:50:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 06:50:41,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:50:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 06:50:42,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:50:42,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010477180] [2023-11-29 06:50:42,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010477180] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:50:42,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:50:42,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-11-29 06:50:42,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890764064] [2023-11-29 06:50:42,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:50:42,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:50:42,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:50:42,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:50:42,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:50:48,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 75 [2023-11-29 06:50:48,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 462 transitions, 6328 flow. Second operand has 18 states, 18 states have (on average 34.77777777777778) internal successors, (626), 18 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:50:48,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:50:48,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 75 [2023-11-29 06:50:48,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand