./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 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_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx --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 e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 20:57:19,021 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 20:57:19,107 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 20:57:19,113 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 20:57:19,114 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 20:57:19,146 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 20:57:19,146 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 20:57:19,147 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 20:57:19,148 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 20:57:19,149 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 20:57:19,150 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 20:57:19,150 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 20:57:19,151 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 20:57:19,152 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 20:57:19,152 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 20:57:19,153 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 20:57:19,154 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 20:57:19,154 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 20:57:19,155 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 20:57:19,155 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 20:57:19,156 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 20:57:19,158 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 20:57:19,159 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 20:57:19,159 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 20:57:19,160 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 20:57:19,160 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 20:57:19,161 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 20:57:19,161 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 20:57:19,161 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 20:57:19,162 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 20:57:19,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:57:19,163 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 20:57:19,163 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 20:57:19,164 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 20:57:19,164 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 20:57:19,165 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 20:57:19,165 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 20:57:19,166 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 20:57:19,166 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 20:57:19,166 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_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc [2023-11-21 20:57:19,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 20:57:19,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 20:57:19,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 20:57:19,480 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 20:57:19,481 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 20:57:19,482 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2023-11-21 20:57:22,857 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 20:57:23,133 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 20:57:23,134 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2023-11-21 20:57:23,144 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/data/856d1ce73/6ebedc30dbf44c0081d881e61b2ad291/FLAGdd9ff9317 [2023-11-21 20:57:23,160 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/data/856d1ce73/6ebedc30dbf44c0081d881e61b2ad291 [2023-11-21 20:57:23,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 20:57:23,165 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 20:57:23,167 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 20:57:23,167 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 20:57:23,176 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 20:57:23,177 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:57:23" (1/1) ... [2023-11-21 20:57:23,179 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6352dfd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:23, skipping insertion in model container [2023-11-21 20:57:23,179 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:57:23" (1/1) ... [2023-11-21 20:57:23,217 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 20:57:23,446 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:57:23,461 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) [2023-11-21 20:57:23,462 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2a12d3f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:23, skipping insertion in model container [2023-11-21 20:57:23,462 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 20:57:23,463 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-21 20:57:23,465 INFO L158 Benchmark]: Toolchain (without parser) took 299.38ms. Allocated memory is still 199.2MB. Free memory was 153.6MB in the beginning and 143.6MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-21 20:57:23,466 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 138.4MB. Free memory is still 82.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 20:57:23,467 INFO L158 Benchmark]: CACSL2BoogieTranslator took 296.30ms. Allocated memory is still 199.2MB. Free memory was 153.6MB in the beginning and 143.6MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-21 20:57:23,469 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 138.4MB. Free memory is still 82.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 296.30ms. Allocated memory is still 199.2MB. Free memory was 153.6MB in the beginning and 143.6MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 122]: 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_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx --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 e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 20:57:26,363 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 20:57:26,499 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-21 20:57:26,506 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 20:57:26,507 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 20:57:26,540 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 20:57:26,541 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 20:57:26,542 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 20:57:26,543 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 20:57:26,544 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 20:57:26,545 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 20:57:26,546 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 20:57:26,547 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 20:57:26,548 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 20:57:26,549 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 20:57:26,550 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 20:57:26,551 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 20:57:26,551 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 20:57:26,552 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 20:57:26,553 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 20:57:26,554 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 20:57:26,554 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 20:57:26,555 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 20:57:26,556 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-21 20:57:26,557 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-21 20:57:26,557 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 20:57:26,558 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 20:57:26,558 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 20:57:26,559 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 20:57:26,560 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 20:57:26,560 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 20:57:26,561 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 20:57:26,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:57:26,562 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 20:57:26,563 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 20:57:26,563 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-21 20:57:26,564 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-21 20:57:26,564 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 20:57:26,565 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 20:57:26,566 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 20:57:26,566 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 20:57:26,567 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-21 20:57:26,567 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_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc [2023-11-21 20:57:27,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 20:57:27,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 20:57:27,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 20:57:27,080 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 20:57:27,080 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 20:57:27,082 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2023-11-21 20:57:30,369 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 20:57:30,776 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 20:57:30,791 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2023-11-21 20:57:30,804 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/data/1430ae396/26618ede4f0a4f2785b7e391772d5d2f/FLAG2c9f144eb [2023-11-21 20:57:30,827 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/data/1430ae396/26618ede4f0a4f2785b7e391772d5d2f [2023-11-21 20:57:30,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 20:57:30,837 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 20:57:30,843 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 20:57:30,844 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 20:57:30,850 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 20:57:30,851 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:57:30" (1/1) ... [2023-11-21 20:57:30,853 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b644d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:30, skipping insertion in model container [2023-11-21 20:57:30,853 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:57:30" (1/1) ... [2023-11-21 20:57:30,905 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 20:57:31,222 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:57:31,252 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-21 20:57:31,264 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 20:57:31,315 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:57:31,329 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 20:57:31,379 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:57:31,405 INFO L206 MainTranslator]: Completed translation [2023-11-21 20:57:31,406 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:31 WrapperNode [2023-11-21 20:57:31,406 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 20:57:31,407 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 20:57:31,408 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 20:57:31,408 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 20:57:31,415 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:31" (1/1) ... [2023-11-21 20:57:31,443 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:31" (1/1) ... [2023-11-21 20:57:31,496 INFO L138 Inliner]: procedures = 27, calls = 35, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 218 [2023-11-21 20:57:31,496 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 20:57:31,497 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 20:57:31,498 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 20:57:31,498 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 20:57:31,508 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:31" (1/1) ... [2023-11-21 20:57:31,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:31" (1/1) ... [2023-11-21 20:57:31,514 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:31" (1/1) ... [2023-11-21 20:57:31,515 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:31" (1/1) ... [2023-11-21 20:57:31,527 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:31" (1/1) ... [2023-11-21 20:57:31,532 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:31" (1/1) ... [2023-11-21 20:57:31,535 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:31" (1/1) ... [2023-11-21 20:57:31,538 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:31" (1/1) ... [2023-11-21 20:57:31,542 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 20:57:31,544 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 20:57:31,544 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 20:57:31,544 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 20:57:31,545 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:31" (1/1) ... [2023-11-21 20:57:31,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:57:31,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:31,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 20:57:31,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 20:57:31,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 20:57:31,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-21 20:57:31,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 20:57:31,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-21 20:57:31,635 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-21 20:57:31,635 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-21 20:57:31,635 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-21 20:57:31,635 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-21 20:57:31,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 20:57:31,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 20:57:31,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 20:57:31,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 20:57:31,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-21 20:57:31,639 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 20:57:31,775 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 20:57:31,778 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 20:57:32,383 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 20:57:32,896 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 20:57:32,897 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 20:57:32,898 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:57:32 BoogieIcfgContainer [2023-11-21 20:57:32,899 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 20:57:32,914 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 20:57:32,914 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 20:57:32,917 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 20:57:32,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 08:57:30" (1/3) ... [2023-11-21 20:57:32,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c94840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:57:32, skipping insertion in model container [2023-11-21 20:57:32,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:31" (2/3) ... [2023-11-21 20:57:32,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c94840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:57:32, skipping insertion in model container [2023-11-21 20:57:32,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:57:32" (3/3) ... [2023-11-21 20:57:32,920 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2023-11-21 20:57:32,941 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 20:57:32,942 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-21 20:57:32,942 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 20:57:33,013 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-21 20:57:33,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 50 transitions, 114 flow [2023-11-21 20:57:33,083 INFO L124 PetriNetUnfolderBase]: 5/48 cut-off events. [2023-11-21 20:57:33,083 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-21 20:57:33,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 48 events. 5/48 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 87 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2023-11-21 20:57:33,088 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 50 transitions, 114 flow [2023-11-21 20:57:33,093 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 47 transitions, 106 flow [2023-11-21 20:57:33,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 20:57:33,111 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;@7f2b8cd5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 20:57:33,111 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-21 20:57:33,116 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 20:57:33,117 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-21 20:57:33,117 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 20:57:33,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:57:33,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 20:57:33,118 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:33,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:33,124 INFO L85 PathProgramCache]: Analyzing trace with hash 684985, now seen corresponding path program 1 times [2023-11-21 20:57:33,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:57:33,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448218470] [2023-11-21 20:57:33,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:33,139 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 [2023-11-21 20:57:33,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:57:33,143 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:57:33,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:33,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 20:57:33,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:33,366 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 [2023-11-21 20:57:33,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:33,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-21 20:57:33,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:33,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-21 20:57:33,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:33,411 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 [2023-11-21 20:57:33,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:33,419 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 [2023-11-21 20:57:33,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:33,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-21 20:57:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:57:33,461 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:57:33,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:57:33,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448218470] [2023-11-21 20:57:33,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448218470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:33,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:33,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 20:57:33,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902564504] [2023-11-21 20:57:33,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:33,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:57:33,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:57:33,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:57:33,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:57:33,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 50 [2023-11-21 20:57:33,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:33,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:57:33,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 50 [2023-11-21 20:57:33,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:57:33,781 INFO L124 PetriNetUnfolderBase]: 92/234 cut-off events. [2023-11-21 20:57:33,781 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-21 20:57:33,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 234 events. 92/234 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1033 event pairs, 68 based on Foata normal form. 24/198 useless extension candidates. Maximal degree in co-relation 360. Up to 160 conditions per place. [2023-11-21 20:57:33,786 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 19 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-11-21 20:57:33,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 138 flow [2023-11-21 20:57:33,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:57:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:57:33,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2023-11-21 20:57:33,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6466666666666666 [2023-11-21 20:57:33,801 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 97 transitions. [2023-11-21 20:57:33,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 97 transitions. [2023-11-21 20:57:33,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:57:33,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 97 transitions. [2023-11-21 20:57:33,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:33,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:33,812 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:33,814 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 3 states and 97 transitions. [2023-11-21 20:57:33,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 138 flow [2023-11-21 20:57:33,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 130 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-21 20:57:33,820 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 92 flow [2023-11-21 20:57:33,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-11-21 20:57:33,826 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-11-21 20:57:33,826 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 92 flow [2023-11-21 20:57:33,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:33,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:57:33,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 20:57:33,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-21 20:57:34,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:57:34,030 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:34,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:34,030 INFO L85 PathProgramCache]: Analyzing trace with hash 684986, now seen corresponding path program 1 times [2023-11-21 20:57:34,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:57:34,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324346539] [2023-11-21 20:57:34,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:34,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:57:34,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:57:34,033 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:57:34,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:34,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 20:57:34,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:34,136 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 [2023-11-21 20:57:34,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:34,147 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 [2023-11-21 20:57:34,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:34,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 20:57:34,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:34,166 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 [2023-11-21 20:57:34,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:34,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-21 20:57:34,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:34,200 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 [2023-11-21 20:57:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:57:34,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:57:34,239 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:57:34,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324346539] [2023-11-21 20:57:34,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324346539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:34,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:34,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 20:57:34,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417341907] [2023-11-21 20:57:34,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:34,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:57:34,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:57:34,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:57:34,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:57:34,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 50 [2023-11-21 20:57:34,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:34,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:57:34,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 50 [2023-11-21 20:57:34,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:57:34,516 INFO L124 PetriNetUnfolderBase]: 93/237 cut-off events. [2023-11-21 20:57:34,516 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-21 20:57:34,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415 conditions, 237 events. 93/237 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1024 event pairs, 68 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 393. Up to 165 conditions per place. [2023-11-21 20:57:34,521 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 22 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2023-11-21 20:57:34,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 150 flow [2023-11-21 20:57:34,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:57:34,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:57:34,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2023-11-21 20:57:34,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2023-11-21 20:57:34,528 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 98 transitions. [2023-11-21 20:57:34,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 98 transitions. [2023-11-21 20:57:34,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:57:34,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 98 transitions. [2023-11-21 20:57:34,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:34,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:34,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:34,532 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 92 flow. Second operand 3 states and 98 transitions. [2023-11-21 20:57:34,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 150 flow [2023-11-21 20:57:34,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 20:57:34,535 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 107 flow [2023-11-21 20:57:34,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2023-11-21 20:57:34,536 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2023-11-21 20:57:34,537 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 107 flow [2023-11-21 20:57:34,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:34,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:57:34,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 20:57:34,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:34,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:57:34,740 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:34,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:34,741 INFO L85 PathProgramCache]: Analyzing trace with hash 685051, now seen corresponding path program 1 times [2023-11-21 20:57:34,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:57:34,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057047138] [2023-11-21 20:57:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:34,742 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 [2023-11-21 20:57:34,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:57:34,743 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:57:34,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:34,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 20:57:34,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:57:34,839 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:57:34,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:57:34,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057047138] [2023-11-21 20:57:34,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057047138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:34,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:34,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 20:57:34,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109038401] [2023-11-21 20:57:34,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:34,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:57:34,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:57:34,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:57:34,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:57:34,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 50 [2023-11-21 20:57:34,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:34,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:57:34,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 50 [2023-11-21 20:57:34,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:57:35,001 INFO L124 PetriNetUnfolderBase]: 92/236 cut-off events. [2023-11-21 20:57:35,001 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-21 20:57:35,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 236 events. 92/236 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1018 event pairs, 68 based on Foata normal form. 1/178 useless extension candidates. Maximal degree in co-relation 403. Up to 163 conditions per place. [2023-11-21 20:57:35,027 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 21 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-11-21 20:57:35,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 150 flow [2023-11-21 20:57:35,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:57:35,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:57:35,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2023-11-21 20:57:35,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2023-11-21 20:57:35,030 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 99 transitions. [2023-11-21 20:57:35,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 99 transitions. [2023-11-21 20:57:35,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:57:35,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 99 transitions. [2023-11-21 20:57:35,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:35,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:35,033 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:35,033 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 107 flow. Second operand 3 states and 99 transitions. [2023-11-21 20:57:35,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 150 flow [2023-11-21 20:57:35,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 44 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 20:57:35,035 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 104 flow [2023-11-21 20:57:35,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-11-21 20:57:35,036 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2023-11-21 20:57:35,036 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 104 flow [2023-11-21 20:57:35,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:35,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:57:35,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 20:57:35,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:35,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:57:35,239 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:35,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:35,240 INFO L85 PathProgramCache]: Analyzing trace with hash 658292546, now seen corresponding path program 1 times [2023-11-21 20:57:35,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:57:35,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096151229] [2023-11-21 20:57:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:35,241 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 [2023-11-21 20:57:35,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:57:35,242 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:57:35,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:35,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 20:57:35,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:57:35,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:57:35,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:57:35,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096151229] [2023-11-21 20:57:35,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096151229] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:57:35,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 20:57:35,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-21 20:57:35,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723646624] [2023-11-21 20:57:35,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:35,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 20:57:35,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:57:35,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 20:57:35,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:57:35,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 50 [2023-11-21 20:57:35,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 104 flow. Second operand has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:35,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:57:35,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 50 [2023-11-21 20:57:35,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:57:35,660 INFO L124 PetriNetUnfolderBase]: 92/240 cut-off events. [2023-11-21 20:57:35,660 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-21 20:57:35,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 240 events. 92/240 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1011 event pairs, 68 based on Foata normal form. 2/183 useless extension candidates. Maximal degree in co-relation 412. Up to 161 conditions per place. [2023-11-21 20:57:35,664 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 21 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2023-11-21 20:57:35,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 47 transitions, 166 flow [2023-11-21 20:57:35,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:57:35,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 20:57:35,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2023-11-21 20:57:35,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.612 [2023-11-21 20:57:35,676 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 153 transitions. [2023-11-21 20:57:35,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 153 transitions. [2023-11-21 20:57:35,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:57:35,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 153 transitions. [2023-11-21 20:57:35,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:35,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 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) [2023-11-21 20:57:35,682 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 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) [2023-11-21 20:57:35,682 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 104 flow. Second operand 5 states and 153 transitions. [2023-11-21 20:57:35,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 47 transitions, 166 flow [2023-11-21 20:57:35,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 20:57:35,685 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 130 flow [2023-11-21 20:57:35,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=130, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-11-21 20:57:35,687 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-11-21 20:57:35,687 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 130 flow [2023-11-21 20:57:35,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:35,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:57:35,687 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-21 20:57:35,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:35,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:57:35,890 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:35,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:35,891 INFO L85 PathProgramCache]: Analyzing trace with hash 658292481, now seen corresponding path program 1 times [2023-11-21 20:57:35,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:57:35,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715872902] [2023-11-21 20:57:35,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:35,892 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 [2023-11-21 20:57:35,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:57:35,893 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:57:35,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:35,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 20:57:35,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:35,999 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 11 treesize of output 5 [2023-11-21 20:57:36,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:36,018 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 [2023-11-21 20:57:36,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:36,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-21 20:57:36,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:36,061 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 [2023-11-21 20:57:36,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:36,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 20:57:36,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:36,089 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 [2023-11-21 20:57:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:57:36,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:57:36,309 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:57:36,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715872902] [2023-11-21 20:57:36,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715872902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:57:36,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 20:57:36,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-21 20:57:36,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694971538] [2023-11-21 20:57:36,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:36,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 20:57:36,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:57:36,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 20:57:36,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:57:36,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 50 [2023-11-21 20:57:36,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 130 flow. Second operand has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 6 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) [2023-11-21 20:57:36,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:57:36,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 50 [2023-11-21 20:57:36,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:57:37,153 INFO L124 PetriNetUnfolderBase]: 92/240 cut-off events. [2023-11-21 20:57:37,153 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-21 20:57:37,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 240 events. 92/240 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1016 event pairs, 68 based on Foata normal form. 2/183 useless extension candidates. Maximal degree in co-relation 398. Up to 164 conditions per place. [2023-11-21 20:57:37,156 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 24 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2023-11-21 20:57:37,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 48 transitions, 202 flow [2023-11-21 20:57:37,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:57:37,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 20:57:37,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2023-11-21 20:57:37,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2023-11-21 20:57:37,159 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 150 transitions. [2023-11-21 20:57:37,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 150 transitions. [2023-11-21 20:57:37,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:57:37,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 150 transitions. [2023-11-21 20:57:37,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:37,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 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) [2023-11-21 20:57:37,161 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 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) [2023-11-21 20:57:37,161 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 130 flow. Second operand 5 states and 150 transitions. [2023-11-21 20:57:37,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 48 transitions, 202 flow [2023-11-21 20:57:37,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 48 transitions, 198 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-21 20:57:37,166 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 152 flow [2023-11-21 20:57:37,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2023-11-21 20:57:37,167 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2023-11-21 20:57:37,167 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 152 flow [2023-11-21 20:57:37,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 6 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) [2023-11-21 20:57:37,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:57:37,168 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1] [2023-11-21 20:57:37,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:37,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:57:37,371 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:37,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:37,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1375296433, now seen corresponding path program 2 times [2023-11-21 20:57:37,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:57:37,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629381386] [2023-11-21 20:57:37,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 20:57:37,372 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 [2023-11-21 20:57:37,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:57:37,374 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:57:37,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:37,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 20:57:37,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:57:37,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 20:57:37,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:37,496 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 [2023-11-21 20:57:37,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:37,518 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 [2023-11-21 20:57:37,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:37,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-21 20:57:37,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:37,559 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 [2023-11-21 20:57:37,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:37,579 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 11 treesize of output 1 [2023-11-21 20:57:37,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:37,591 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 [2023-11-21 20:57:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:57:37,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:57:38,451 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:57:38,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629381386] [2023-11-21 20:57:38,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629381386] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:57:38,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 20:57:38,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-21 20:57:38,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596858065] [2023-11-21 20:57:38,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:38,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 20:57:38,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:57:38,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 20:57:38,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-21 20:57:39,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 50 [2023-11-21 20:57:39,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 152 flow. Second operand has 11 states, 11 states have (on average 25.636363636363637) internal successors, (282), 11 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:39,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:57:39,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 50 [2023-11-21 20:57:39,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:57:40,464 INFO L124 PetriNetUnfolderBase]: 91/237 cut-off events. [2023-11-21 20:57:40,465 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-21 20:57:40,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 237 events. 91/237 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1010 event pairs, 68 based on Foata normal form. 1/179 useless extension candidates. Maximal degree in co-relation 408. Up to 160 conditions per place. [2023-11-21 20:57:40,468 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 20 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2023-11-21 20:57:40,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 45 transitions, 186 flow [2023-11-21 20:57:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 20:57:40,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 20:57:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2023-11-21 20:57:40,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2023-11-21 20:57:40,471 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 170 transitions. [2023-11-21 20:57:40,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 170 transitions. [2023-11-21 20:57:40,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:57:40,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 170 transitions. [2023-11-21 20:57:40,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:40,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:40,474 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:40,474 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 152 flow. Second operand 6 states and 170 transitions. [2023-11-21 20:57:40,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 45 transitions, 186 flow [2023-11-21 20:57:40,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 170 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-11-21 20:57:40,478 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 122 flow [2023-11-21 20:57:40,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=122, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2023-11-21 20:57:40,479 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2023-11-21 20:57:40,479 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 122 flow [2023-11-21 20:57:40,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.636363636363637) internal successors, (282), 11 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:40,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:57:40,480 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1] [2023-11-21 20:57:40,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:40,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:57:40,685 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:40,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:40,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1375296368, now seen corresponding path program 2 times [2023-11-21 20:57:40,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:57:40,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539425920] [2023-11-21 20:57:40,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 20:57:40,686 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 [2023-11-21 20:57:40,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:57:40,688 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:57:40,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:40,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-21 20:57:40,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:57:40,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 20:57:40,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:40,825 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 20:57:40,826 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 19 treesize of output 22 [2023-11-21 20:57:40,880 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-21 20:57:40,881 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 24 treesize of output 22 [2023-11-21 20:57:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:57:41,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:57:41,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:57:41,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539425920] [2023-11-21 20:57:41,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539425920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:41,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:41,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 20:57:41,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151095602] [2023-11-21 20:57:41,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:41,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:57:41,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:57:41,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:57:41,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:57:41,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2023-11-21 20:57:41,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:41,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:57:41,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2023-11-21 20:57:41,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:57:41,410 INFO L124 PetriNetUnfolderBase]: 141/314 cut-off events. [2023-11-21 20:57:41,411 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-21 20:57:41,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 314 events. 141/314 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1313 event pairs, 108 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 546. Up to 242 conditions per place. [2023-11-21 20:57:41,414 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 24 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-21 20:57:41,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 41 transitions, 168 flow [2023-11-21 20:57:41,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:57:41,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:57:41,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-21 20:57:41,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2023-11-21 20:57:41,416 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-21 20:57:41,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-21 20:57:41,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:57:41,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-21 20:57:41,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:41,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:41,418 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:41,418 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 122 flow. Second operand 3 states and 88 transitions. [2023-11-21 20:57:41,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 41 transitions, 168 flow [2023-11-21 20:57:41,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 41 transitions, 148 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-11-21 20:57:41,421 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 100 flow [2023-11-21 20:57:41,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-11-21 20:57:41,422 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2023-11-21 20:57:41,422 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 100 flow [2023-11-21 20:57:41,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:41,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:57:41,423 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1] [2023-11-21 20:57:41,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:41,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:57:41,634 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:41,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:41,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1375296367, now seen corresponding path program 1 times [2023-11-21 20:57:41,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:57:41,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863796555] [2023-11-21 20:57:41,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:41,635 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 [2023-11-21 20:57:41,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:57:41,645 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:57:41,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:41,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 20:57:41,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:41,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:41,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-11-21 20:57:41,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:41,811 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 [2023-11-21 20:57:41,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:41,854 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-21 20:57:41,855 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 14 treesize of output 15 [2023-11-21 20:57:41,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-21 20:57:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:57:42,172 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:57:42,172 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:57:42,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863796555] [2023-11-21 20:57:42,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863796555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:42,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:42,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 20:57:42,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607443868] [2023-11-21 20:57:42,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:42,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:57:42,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:57:42,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:57:42,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:57:42,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 50 [2023-11-21 20:57:42,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:42,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:57:42,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 50 [2023-11-21 20:57:42,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:57:42,451 INFO L124 PetriNetUnfolderBase]: 91/225 cut-off events. [2023-11-21 20:57:42,451 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-21 20:57:42,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 225 events. 91/225 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 923 event pairs, 68 based on Foata normal form. 26/204 useless extension candidates. Maximal degree in co-relation 401. Up to 166 conditions per place. [2023-11-21 20:57:42,454 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 22 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-11-21 20:57:42,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 142 flow [2023-11-21 20:57:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:57:42,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:57:42,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2023-11-21 20:57:42,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2023-11-21 20:57:42,456 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2023-11-21 20:57:42,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2023-11-21 20:57:42,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:57:42,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2023-11-21 20:57:42,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:42,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:42,458 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:42,458 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 100 flow. Second operand 3 states and 92 transitions. [2023-11-21 20:57:42,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 142 flow [2023-11-21 20:57:42,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 20:57:42,460 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 97 flow [2023-11-21 20:57:42,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-11-21 20:57:42,461 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2023-11-21 20:57:42,461 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 97 flow [2023-11-21 20:57:42,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:42,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:57:42,462 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:42,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:42,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:57:42,665 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:42,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:42,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1760413030, now seen corresponding path program 1 times [2023-11-21 20:57:42,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:57:42,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453197014] [2023-11-21 20:57:42,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:42,666 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 [2023-11-21 20:57:42,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:57:42,667 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:57:42,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:42,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 20:57:42,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:42,834 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 20:57:42,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-21 20:57:42,870 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 20:57:42,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 14 treesize of output 15 [2023-11-21 20:57:42,905 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 20:57:42,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-21 20:57:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:57:43,141 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:57:43,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:57:43,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453197014] [2023-11-21 20:57:43,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453197014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:43,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:43,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 20:57:43,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558408338] [2023-11-21 20:57:43,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:43,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:57:43,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:57:43,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:57:43,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:57:43,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2023-11-21 20:57:43,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:43,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:57:43,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2023-11-21 20:57:43,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:57:43,384 INFO L124 PetriNetUnfolderBase]: 101/238 cut-off events. [2023-11-21 20:57:43,384 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-21 20:57:43,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 238 events. 101/238 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 937 event pairs, 76 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 434. Up to 186 conditions per place. [2023-11-21 20:57:43,387 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 24 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-11-21 20:57:43,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 143 flow [2023-11-21 20:57:43,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:57:43,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:57:43,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-21 20:57:43,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2023-11-21 20:57:43,389 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-21 20:57:43,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-21 20:57:43,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:57:43,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-21 20:57:43,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:43,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:43,391 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:43,391 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 97 flow. Second operand 3 states and 88 transitions. [2023-11-21 20:57:43,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 143 flow [2023-11-21 20:57:43,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 37 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 20:57:43,393 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 94 flow [2023-11-21 20:57:43,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-11-21 20:57:43,395 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-11-21 20:57:43,396 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 94 flow [2023-11-21 20:57:43,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:43,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:57:43,396 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:43,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:43,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:57:43,599 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:43,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:43,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1760413029, now seen corresponding path program 1 times [2023-11-21 20:57:43,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:57:43,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560417281] [2023-11-21 20:57:43,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:43,601 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 [2023-11-21 20:57:43,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:57:43,602 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:57:43,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:43,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 20:57:43,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:43,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:43,789 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 [2023-11-21 20:57:43,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:43,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-21 20:57:43,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:43,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:43,824 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 11 treesize of output 1 [2023-11-21 20:57:43,829 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 20:57:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:57:43,916 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:57:43,917 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:57:43,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560417281] [2023-11-21 20:57:43,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560417281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:43,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:43,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 20:57:43,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160065660] [2023-11-21 20:57:43,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:43,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:57:43,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:57:43,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:57:43,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:57:44,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 50 [2023-11-21 20:57:44,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:44,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:57:44,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 50 [2023-11-21 20:57:44,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:57:44,131 INFO L124 PetriNetUnfolderBase]: 91/215 cut-off events. [2023-11-21 20:57:44,132 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-21 20:57:44,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 215 events. 91/215 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 844 event pairs, 68 based on Foata normal form. 9/187 useless extension candidates. Maximal degree in co-relation 391. Up to 166 conditions per place. [2023-11-21 20:57:44,134 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 22 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-11-21 20:57:44,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 35 transitions, 136 flow [2023-11-21 20:57:44,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:57:44,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:57:44,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2023-11-21 20:57:44,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2023-11-21 20:57:44,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2023-11-21 20:57:44,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2023-11-21 20:57:44,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:57:44,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2023-11-21 20:57:44,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:44,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:44,138 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:44,138 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 94 flow. Second operand 3 states and 92 transitions. [2023-11-21 20:57:44,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 35 transitions, 136 flow [2023-11-21 20:57:44,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 35 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 20:57:44,140 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 91 flow [2023-11-21 20:57:44,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2023-11-21 20:57:44,141 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -6 predicate places. [2023-11-21 20:57:44,141 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 91 flow [2023-11-21 20:57:44,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:44,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:57:44,142 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:44,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:44,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:57:44,345 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:44,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:44,346 INFO L85 PathProgramCache]: Analyzing trace with hash 461450114, now seen corresponding path program 1 times [2023-11-21 20:57:44,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:57:44,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39313696] [2023-11-21 20:57:44,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:44,347 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 [2023-11-21 20:57:44,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:57:44,348 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:57:44,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:44,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 20:57:44,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:44,481 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 [2023-11-21 20:57:44,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:44,490 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 [2023-11-21 20:57:44,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:44,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-21 20:57:44,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:44,520 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 [2023-11-21 20:57:44,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:44,529 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 6 treesize of output 1 [2023-11-21 20:57:44,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:44,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-21 20:57:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:57:44,591 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:57:44,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:57:44,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39313696] [2023-11-21 20:57:44,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39313696] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:44,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:44,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 20:57:44,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282385910] [2023-11-21 20:57:44,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:44,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 20:57:44,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:57:44,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 20:57:44,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 20:57:44,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 50 [2023-11-21 20:57:44,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:44,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:57:44,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 50 [2023-11-21 20:57:44,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:57:44,861 INFO L124 PetriNetUnfolderBase]: 91/203 cut-off events. [2023-11-21 20:57:44,861 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-21 20:57:44,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 203 events. 91/203 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 736 event pairs, 68 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 379. Up to 159 conditions per place. [2023-11-21 20:57:44,864 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 21 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-11-21 20:57:44,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 33 transitions, 133 flow [2023-11-21 20:57:44,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 20:57:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 20:57:44,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2023-11-21 20:57:44,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555 [2023-11-21 20:57:44,867 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 111 transitions. [2023-11-21 20:57:44,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 111 transitions. [2023-11-21 20:57:44,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:57:44,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 111 transitions. [2023-11-21 20:57:44,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:44,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:44,869 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:44,870 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 91 flow. Second operand 4 states and 111 transitions. [2023-11-21 20:57:44,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 33 transitions, 133 flow [2023-11-21 20:57:44,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 33 transitions, 132 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 20:57:44,872 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 90 flow [2023-11-21 20:57:44,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2023-11-21 20:57:44,874 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -6 predicate places. [2023-11-21 20:57:44,874 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 90 flow [2023-11-21 20:57:44,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:44,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:57:44,875 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:44,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:45,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:57:45,078 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:45,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:45,079 INFO L85 PathProgramCache]: Analyzing trace with hash 461450115, now seen corresponding path program 1 times [2023-11-21 20:57:45,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:57:45,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749521801] [2023-11-21 20:57:45,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:45,080 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 [2023-11-21 20:57:45,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:57:45,083 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:57:45,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:45,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 20:57:45,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:45,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 20:57:45,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:45,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-21 20:57:45,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:45,264 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 11 treesize of output 1 [2023-11-21 20:57:45,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:45,286 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 [2023-11-21 20:57:45,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:45,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-21 20:57:45,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:45,305 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 [2023-11-21 20:57:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:57:45,449 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:57:45,449 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:57:45,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749521801] [2023-11-21 20:57:45,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749521801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:45,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:45,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 20:57:45,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429056720] [2023-11-21 20:57:45,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:45,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:57:45,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:57:45,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:57:45,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:57:45,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 50 [2023-11-21 20:57:45,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:45,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:57:45,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 50 [2023-11-21 20:57:45,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:57:45,849 INFO L124 PetriNetUnfolderBase]: 181/388 cut-off events. [2023-11-21 20:57:45,850 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-21 20:57:45,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 388 events. 181/388 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1738 event pairs, 119 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 727. Up to 188 conditions per place. [2023-11-21 20:57:45,853 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 35 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2023-11-21 20:57:45,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 201 flow [2023-11-21 20:57:45,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:57:45,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 20:57:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2023-11-21 20:57:45,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632 [2023-11-21 20:57:45,855 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 158 transitions. [2023-11-21 20:57:45,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 158 transitions. [2023-11-21 20:57:45,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:57:45,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 158 transitions. [2023-11-21 20:57:45,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:45,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 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) [2023-11-21 20:57:45,858 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 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) [2023-11-21 20:57:45,858 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 90 flow. Second operand 5 states and 158 transitions. [2023-11-21 20:57:45,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 201 flow [2023-11-21 20:57:45,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 48 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 20:57:45,860 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 103 flow [2023-11-21 20:57:45,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2023-11-21 20:57:45,861 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2023-11-21 20:57:45,861 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 103 flow [2023-11-21 20:57:45,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:45,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:57:45,862 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:45,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:46,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:57:46,065 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:46,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:46,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1129245317, now seen corresponding path program 1 times [2023-11-21 20:57:46,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:57:46,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086085993] [2023-11-21 20:57:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:46,066 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 [2023-11-21 20:57:46,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:57:46,067 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:57:46,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:46,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 20:57:46,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:46,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 20:57:46,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:46,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-21 20:57:46,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:46,228 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 [2023-11-21 20:57:46,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:46,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 20:57:46,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:46,258 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 [2023-11-21 20:57:46,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:46,267 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 11 treesize of output 1 [2023-11-21 20:57:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:57:46,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:57:46,803 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:57:46,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086085993] [2023-11-21 20:57:46,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086085993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:57:46,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 20:57:46,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-21 20:57:46,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107385095] [2023-11-21 20:57:46,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:46,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 20:57:46,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:57:46,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 20:57:46,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-21 20:57:48,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 50 [2023-11-21 20:57:48,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 103 flow. Second operand has 10 states, 10 states have (on average 26.0) internal successors, (260), 10 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:48,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:57:48,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 50 [2023-11-21 20:57:48,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:57:48,958 INFO L124 PetriNetUnfolderBase]: 327/684 cut-off events. [2023-11-21 20:57:48,958 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-21 20:57:48,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1385 conditions, 684 events. 327/684 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3407 event pairs, 83 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 1372. Up to 188 conditions per place. [2023-11-21 20:57:48,964 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 63 selfloop transitions, 6 changer transitions 0/78 dead transitions. [2023-11-21 20:57:48,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 78 transitions, 342 flow [2023-11-21 20:57:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 20:57:48,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 20:57:48,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 237 transitions. [2023-11-21 20:57:48,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6771428571428572 [2023-11-21 20:57:48,967 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 237 transitions. [2023-11-21 20:57:48,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 237 transitions. [2023-11-21 20:57:48,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:57:48,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 237 transitions. [2023-11-21 20:57:48,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 33.857142857142854) internal successors, (237), 7 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:48,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 50.0) internal successors, (400), 8 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:48,970 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 50.0) internal successors, (400), 8 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:48,970 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 103 flow. Second operand 7 states and 237 transitions. [2023-11-21 20:57:48,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 78 transitions, 342 flow [2023-11-21 20:57:48,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 78 transitions, 336 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-21 20:57:48,973 INFO L231 Difference]: Finished difference. Result has 51 places, 36 transitions, 127 flow [2023-11-21 20:57:48,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=127, PETRI_PLACES=51, PETRI_TRANSITIONS=36} [2023-11-21 20:57:48,974 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-11-21 20:57:48,975 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 36 transitions, 127 flow [2023-11-21 20:57:48,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.0) internal successors, (260), 10 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:48,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:57:48,975 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:48,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:49,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:57:49,187 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:49,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:49,188 INFO L85 PathProgramCache]: Analyzing trace with hash 695481595, now seen corresponding path program 1 times [2023-11-21 20:57:49,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:57:49,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032011510] [2023-11-21 20:57:49,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:49,189 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 [2023-11-21 20:57:49,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:57:49,190 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:57:49,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:49,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 20:57:49,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:49,352 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 [2023-11-21 20:57:49,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:49,365 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 [2023-11-21 20:57:49,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:49,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 20:57:49,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:49,397 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 [2023-11-21 20:57:49,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:49,405 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 [2023-11-21 20:57:49,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:49,415 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 11 treesize of output 1 [2023-11-21 20:57:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:57:49,588 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:57:49,588 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:57:49,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032011510] [2023-11-21 20:57:49,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032011510] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:49,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:49,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 20:57:49,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786617743] [2023-11-21 20:57:49,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:49,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:57:49,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:57:49,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:57:49,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:57:49,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 50 [2023-11-21 20:57:49,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 36 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:49,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:57:49,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 50 [2023-11-21 20:57:49,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:57:50,214 INFO L124 PetriNetUnfolderBase]: 585/1157 cut-off events. [2023-11-21 20:57:50,214 INFO L125 PetriNetUnfolderBase]: For 472/480 co-relation queries the response was YES. [2023-11-21 20:57:50,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2513 conditions, 1157 events. 585/1157 cut-off events. For 472/480 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6406 event pairs, 313 based on Foata normal form. 0/954 useless extension candidates. Maximal degree in co-relation 2498. Up to 636 conditions per place. [2023-11-21 20:57:50,226 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 39 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-11-21 20:57:50,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 271 flow [2023-11-21 20:57:50,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:57:50,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 20:57:50,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2023-11-21 20:57:50,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624 [2023-11-21 20:57:50,228 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 156 transitions. [2023-11-21 20:57:50,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 156 transitions. [2023-11-21 20:57:50,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:57:50,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 156 transitions. [2023-11-21 20:57:50,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 31.2) internal successors, (156), 5 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) [2023-11-21 20:57:50,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 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) [2023-11-21 20:57:50,231 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 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) [2023-11-21 20:57:50,231 INFO L175 Difference]: Start difference. First operand has 51 places, 36 transitions, 127 flow. Second operand 5 states and 156 transitions. [2023-11-21 20:57:50,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 271 flow [2023-11-21 20:57:50,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 256 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-21 20:57:50,234 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 134 flow [2023-11-21 20:57:50,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=134, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2023-11-21 20:57:50,235 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2023-11-21 20:57:50,236 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 134 flow [2023-11-21 20:57:50,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:50,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:57:50,236 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:50,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:50,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:57:50,440 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:50,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:50,441 INFO L85 PathProgramCache]: Analyzing trace with hash 170662892, now seen corresponding path program 1 times [2023-11-21 20:57:50,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:57:50,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101790017] [2023-11-21 20:57:50,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:50,442 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 [2023-11-21 20:57:50,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:57:50,443 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:57:50,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:50,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 20:57:50,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:50,626 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 [2023-11-21 20:57:50,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:50,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-21 20:57:50,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:50,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-21 20:57:50,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:50,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-21 20:57:50,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:50,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-21 20:57:50,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:50,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-21 20:57:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:57:50,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:57:51,370 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:57:51,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101790017] [2023-11-21 20:57:51,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101790017] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:57:51,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 20:57:51,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-21 20:57:51,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124014799] [2023-11-21 20:57:51,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:51,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 20:57:51,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:57:51,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 20:57:51,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-21 20:57:52,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 50 [2023-11-21 20:57:52,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 134 flow. Second operand has 10 states, 10 states have (on average 26.4) internal successors, (264), 10 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:52,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:57:52,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 50 [2023-11-21 20:57:52,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:57:53,826 INFO L124 PetriNetUnfolderBase]: 1025/2019 cut-off events. [2023-11-21 20:57:53,826 INFO L125 PetriNetUnfolderBase]: For 678/704 co-relation queries the response was YES. [2023-11-21 20:57:53,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4481 conditions, 2019 events. 1025/2019 cut-off events. For 678/704 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 12335 event pairs, 305 based on Foata normal form. 0/1676 useless extension candidates. Maximal degree in co-relation 4465. Up to 636 conditions per place. [2023-11-21 20:57:53,845 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 69 selfloop transitions, 6 changer transitions 0/84 dead transitions. [2023-11-21 20:57:53,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 84 transitions, 442 flow [2023-11-21 20:57:53,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 20:57:53,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 20:57:53,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 231 transitions. [2023-11-21 20:57:53,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2023-11-21 20:57:53,849 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 231 transitions. [2023-11-21 20:57:53,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 231 transitions. [2023-11-21 20:57:53,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:57:53,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 231 transitions. [2023-11-21 20:57:53,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:53,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 50.0) internal successors, (400), 8 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:53,852 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 50.0) internal successors, (400), 8 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:53,852 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 134 flow. Second operand 7 states and 231 transitions. [2023-11-21 20:57:53,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 84 transitions, 442 flow [2023-11-21 20:57:53,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 84 transitions, 436 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-21 20:57:53,857 INFO L231 Difference]: Finished difference. Result has 58 places, 39 transitions, 158 flow [2023-11-21 20:57:53,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=158, PETRI_PLACES=58, PETRI_TRANSITIONS=39} [2023-11-21 20:57:53,858 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2023-11-21 20:57:53,858 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 39 transitions, 158 flow [2023-11-21 20:57:53,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.4) internal successors, (264), 10 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:53,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:57:53,859 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:53,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:54,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:57:54,063 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:54,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:54,063 INFO L85 PathProgramCache]: Analyzing trace with hash -798762885, now seen corresponding path program 2 times [2023-11-21 20:57:54,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:57:54,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755451752] [2023-11-21 20:57:54,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 20:57:54,064 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 [2023-11-21 20:57:54,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:57:54,065 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:57:54,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:54,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 20:57:54,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:57:54,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 20:57:54,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:54,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 20:57:54,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:54,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-21 20:57:54,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:54,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-21 20:57:54,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:54,306 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 [2023-11-21 20:57:54,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:54,311 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 [2023-11-21 20:57:54,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:54,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-21 20:57:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:57:54,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:57:55,217 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:57:55,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755451752] [2023-11-21 20:57:55,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755451752] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:57:55,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 20:57:55,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2023-11-21 20:57:55,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458108630] [2023-11-21 20:57:55,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:55,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 20:57:55,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:57:55,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 20:57:55,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-21 20:57:57,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 50 [2023-11-21 20:57:57,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 39 transitions, 158 flow. Second operand has 13 states, 13 states have (on average 26.153846153846153) internal successors, (340), 13 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:57,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:57:57,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 50 [2023-11-21 20:57:57,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:57:58,163 INFO L124 PetriNetUnfolderBase]: 881/1857 cut-off events. [2023-11-21 20:57:58,163 INFO L125 PetriNetUnfolderBase]: For 946/969 co-relation queries the response was YES. [2023-11-21 20:57:58,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4181 conditions, 1857 events. 881/1857 cut-off events. For 946/969 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 11738 event pairs, 198 based on Foata normal form. 0/1604 useless extension candidates. Maximal degree in co-relation 4163. Up to 398 conditions per place. [2023-11-21 20:57:58,179 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 83 selfloop transitions, 6 changer transitions 0/98 dead transitions. [2023-11-21 20:57:58,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 98 transitions, 550 flow [2023-11-21 20:57:58,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 20:57:58,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-21 20:57:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 265 transitions. [2023-11-21 20:57:58,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6625 [2023-11-21 20:57:58,182 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 265 transitions. [2023-11-21 20:57:58,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 265 transitions. [2023-11-21 20:57:58,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:57:58,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 265 transitions. [2023-11-21 20:57:58,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 33.125) internal successors, (265), 8 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:58,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 50.0) internal successors, (450), 9 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) [2023-11-21 20:57:58,186 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 50.0) internal successors, (450), 9 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) [2023-11-21 20:57:58,186 INFO L175 Difference]: Start difference. First operand has 58 places, 39 transitions, 158 flow. Second operand 8 states and 265 transitions. [2023-11-21 20:57:58,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 98 transitions, 550 flow [2023-11-21 20:57:58,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 98 transitions, 508 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-11-21 20:57:58,192 INFO L231 Difference]: Finished difference. Result has 58 places, 37 transitions, 141 flow [2023-11-21 20:57:58,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=141, PETRI_PLACES=58, PETRI_TRANSITIONS=37} [2023-11-21 20:57:58,194 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2023-11-21 20:57:58,194 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 37 transitions, 141 flow [2023-11-21 20:57:58,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.153846153846153) internal successors, (340), 13 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:57:58,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:57:58,195 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:58,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:58,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:57:58,405 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:58,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:58,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1535037044, now seen corresponding path program 2 times [2023-11-21 20:57:58,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:57:58,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218779027] [2023-11-21 20:57:58,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 20:57:58,406 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 [2023-11-21 20:57:58,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:57:58,408 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:57:58,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:57:58,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 20:57:58,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:57:58,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 20:57:58,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:58,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 20:57:58,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:58,662 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 11 treesize of output 1 [2023-11-21 20:57:58,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:58,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-21 20:57:58,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:58,695 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 [2023-11-21 20:57:58,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:58,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-21 20:57:58,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:58,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-21 20:57:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:57:59,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:57:59,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:57:59,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218779027] [2023-11-21 20:57:59,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218779027] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:57:59,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 20:57:59,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2023-11-21 20:57:59,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387430891] [2023-11-21 20:57:59,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:59,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 20:57:59,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:57:59,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 20:57:59,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-21 20:58:01,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 50 [2023-11-21 20:58:01,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 37 transitions, 141 flow. Second operand has 13 states, 13 states have (on average 26.46153846153846) internal successors, (344), 13 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:01,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:58:01,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 50 [2023-11-21 20:58:01,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:58:02,290 INFO L124 PetriNetUnfolderBase]: 795/1637 cut-off events. [2023-11-21 20:58:02,290 INFO L125 PetriNetUnfolderBase]: For 749/749 co-relation queries the response was YES. [2023-11-21 20:58:02,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3712 conditions, 1637 events. 795/1637 cut-off events. For 749/749 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 9854 event pairs, 45 based on Foata normal form. 0/1527 useless extension candidates. Maximal degree in co-relation 3696. Up to 352 conditions per place. [2023-11-21 20:58:02,304 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 71 selfloop transitions, 6 changer transitions 0/85 dead transitions. [2023-11-21 20:58:02,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 85 transitions, 456 flow [2023-11-21 20:58:02,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 20:58:02,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-21 20:58:02,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 258 transitions. [2023-11-21 20:58:02,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2023-11-21 20:58:02,307 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 258 transitions. [2023-11-21 20:58:02,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 258 transitions. [2023-11-21 20:58:02,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:58:02,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 258 transitions. [2023-11-21 20:58:02,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 32.25) internal successors, (258), 8 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:02,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 50.0) internal successors, (450), 9 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) [2023-11-21 20:58:02,310 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 50.0) internal successors, (450), 9 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) [2023-11-21 20:58:02,310 INFO L175 Difference]: Start difference. First operand has 58 places, 37 transitions, 141 flow. Second operand 8 states and 258 transitions. [2023-11-21 20:58:02,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 85 transitions, 456 flow [2023-11-21 20:58:02,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 85 transitions, 408 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-11-21 20:58:02,315 INFO L231 Difference]: Finished difference. Result has 55 places, 35 transitions, 122 flow [2023-11-21 20:58:02,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=122, PETRI_PLACES=55, PETRI_TRANSITIONS=35} [2023-11-21 20:58:02,316 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 6 predicate places. [2023-11-21 20:58:02,316 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 35 transitions, 122 flow [2023-11-21 20:58:02,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.46153846153846) internal successors, (344), 13 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:02,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:58:02,317 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:02,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:02,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:58:02,532 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:58:02,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:02,532 INFO L85 PathProgramCache]: Analyzing trace with hash -66329587, now seen corresponding path program 1 times [2023-11-21 20:58:02,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:58:02,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247514146] [2023-11-21 20:58:02,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:02,533 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 [2023-11-21 20:58:02,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:58:02,534 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:58:02,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:58:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:02,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 20:58:02,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:58:03,094 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:58:03,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:58:03,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247514146] [2023-11-21 20:58:03,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247514146] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:03,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:03,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 20:58:03,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715370327] [2023-11-21 20:58:03,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:03,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 20:58:03,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:58:03,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 20:58:03,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:58:03,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 50 [2023-11-21 20:58:03,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 35 transitions, 122 flow. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:03,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:58:03,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 50 [2023-11-21 20:58:03,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:58:03,716 INFO L124 PetriNetUnfolderBase]: 798/1732 cut-off events. [2023-11-21 20:58:03,716 INFO L125 PetriNetUnfolderBase]: For 635/637 co-relation queries the response was YES. [2023-11-21 20:58:03,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3823 conditions, 1732 events. 798/1732 cut-off events. For 635/637 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 11151 event pairs, 655 based on Foata normal form. 5/1735 useless extension candidates. Maximal degree in co-relation 3809. Up to 1077 conditions per place. [2023-11-21 20:58:03,745 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 47 selfloop transitions, 3 changer transitions 8/66 dead transitions. [2023-11-21 20:58:03,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 66 transitions, 342 flow [2023-11-21 20:58:03,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:58:03,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 20:58:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 176 transitions. [2023-11-21 20:58:03,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.704 [2023-11-21 20:58:03,747 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 176 transitions. [2023-11-21 20:58:03,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 176 transitions. [2023-11-21 20:58:03,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:58:03,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 176 transitions. [2023-11-21 20:58:03,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:03,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 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) [2023-11-21 20:58:03,749 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 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) [2023-11-21 20:58:03,750 INFO L175 Difference]: Start difference. First operand has 55 places, 35 transitions, 122 flow. Second operand 5 states and 176 transitions. [2023-11-21 20:58:03,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 66 transitions, 342 flow [2023-11-21 20:58:03,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 317 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-21 20:58:03,754 INFO L231 Difference]: Finished difference. Result has 56 places, 36 transitions, 131 flow [2023-11-21 20:58:03,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=131, PETRI_PLACES=56, PETRI_TRANSITIONS=36} [2023-11-21 20:58:03,755 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2023-11-21 20:58:03,755 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 36 transitions, 131 flow [2023-11-21 20:58:03,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:03,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:58:03,756 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:03,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:03,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:58:03,960 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:58:03,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:03,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1509560097, now seen corresponding path program 2 times [2023-11-21 20:58:03,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:58:03,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172367762] [2023-11-21 20:58:03,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 20:58:03,961 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 [2023-11-21 20:58:03,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:58:03,962 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:58:03,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:58:04,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-21 20:58:04,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:58:04,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 20:58:04,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:58:04,644 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:58:04,644 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:58:04,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172367762] [2023-11-21 20:58:04,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172367762] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:04,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:04,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 20:58:04,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90991336] [2023-11-21 20:58:04,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:04,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 20:58:04,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:58:04,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 20:58:04,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:58:04,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 50 [2023-11-21 20:58:04,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 36 transitions, 131 flow. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:04,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:58:04,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 50 [2023-11-21 20:58:04,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:58:05,462 INFO L124 PetriNetUnfolderBase]: 842/1817 cut-off events. [2023-11-21 20:58:05,463 INFO L125 PetriNetUnfolderBase]: For 974/975 co-relation queries the response was YES. [2023-11-21 20:58:05,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4371 conditions, 1817 events. 842/1817 cut-off events. For 974/975 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 11818 event pairs, 594 based on Foata normal form. 4/1821 useless extension candidates. Maximal degree in co-relation 4355. Up to 1085 conditions per place. [2023-11-21 20:58:05,479 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 48 selfloop transitions, 7 changer transitions 4/67 dead transitions. [2023-11-21 20:58:05,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 67 transitions, 361 flow [2023-11-21 20:58:05,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:58:05,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 20:58:05,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 179 transitions. [2023-11-21 20:58:05,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.716 [2023-11-21 20:58:05,482 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 179 transitions. [2023-11-21 20:58:05,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 179 transitions. [2023-11-21 20:58:05,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:58:05,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 179 transitions. [2023-11-21 20:58:05,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 35.8) internal successors, (179), 5 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:05,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 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) [2023-11-21 20:58:05,485 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 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) [2023-11-21 20:58:05,485 INFO L175 Difference]: Start difference. First operand has 56 places, 36 transitions, 131 flow. Second operand 5 states and 179 transitions. [2023-11-21 20:58:05,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 67 transitions, 361 flow [2023-11-21 20:58:05,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 67 transitions, 343 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-21 20:58:05,489 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 178 flow [2023-11-21 20:58:05,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2023-11-21 20:58:05,490 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 10 predicate places. [2023-11-21 20:58:05,490 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 178 flow [2023-11-21 20:58:05,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:05,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:58:05,491 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:05,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:05,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:58:05,695 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:58:05,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:05,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1245444153, now seen corresponding path program 3 times [2023-11-21 20:58:05,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:58:05,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121318484] [2023-11-21 20:58:05,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 20:58:05,696 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 [2023-11-21 20:58:05,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:58:05,705 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:58:05,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:58:05,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-21 20:58:05,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:58:05,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 20:58:05,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:58:06,108 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:58:06,109 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:58:06,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121318484] [2023-11-21 20:58:06,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121318484] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:06,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:06,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 20:58:06,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448265101] [2023-11-21 20:58:06,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:06,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 20:58:06,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:58:06,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 20:58:06,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:58:06,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 50 [2023-11-21 20:58:06,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 178 flow. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:06,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:58:06,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 50 [2023-11-21 20:58:06,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:58:06,783 INFO L124 PetriNetUnfolderBase]: 843/1771 cut-off events. [2023-11-21 20:58:06,783 INFO L125 PetriNetUnfolderBase]: For 1350/1357 co-relation queries the response was YES. [2023-11-21 20:58:06,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4628 conditions, 1771 events. 843/1771 cut-off events. For 1350/1357 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 11273 event pairs, 610 based on Foata normal form. 6/1772 useless extension candidates. Maximal degree in co-relation 4610. Up to 1101 conditions per place. [2023-11-21 20:58:06,801 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 51 selfloop transitions, 6 changer transitions 6/71 dead transitions. [2023-11-21 20:58:06,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 431 flow [2023-11-21 20:58:06,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:58:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 20:58:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 173 transitions. [2023-11-21 20:58:06,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.692 [2023-11-21 20:58:06,803 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 173 transitions. [2023-11-21 20:58:06,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 173 transitions. [2023-11-21 20:58:06,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:58:06,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 173 transitions. [2023-11-21 20:58:06,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:06,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 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) [2023-11-21 20:58:06,805 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 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) [2023-11-21 20:58:06,805 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 178 flow. Second operand 5 states and 173 transitions. [2023-11-21 20:58:06,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 431 flow [2023-11-21 20:58:06,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 71 transitions, 423 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 20:58:06,810 INFO L231 Difference]: Finished difference. Result has 65 places, 42 transitions, 206 flow [2023-11-21 20:58:06,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=65, PETRI_TRANSITIONS=42} [2023-11-21 20:58:06,811 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2023-11-21 20:58:06,811 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 42 transitions, 206 flow [2023-11-21 20:58:06,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:06,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:58:06,811 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:06,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:07,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:58:07,015 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:58:07,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:07,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1839628099, now seen corresponding path program 4 times [2023-11-21 20:58:07,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:58:07,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734610538] [2023-11-21 20:58:07,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 20:58:07,017 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 [2023-11-21 20:58:07,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:58:07,019 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:58:07,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:58:07,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 20:58:07,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:58:07,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 20:58:07,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:58:07,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:58:07,655 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:58:07,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734610538] [2023-11-21 20:58:07,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734610538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:07,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:07,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 20:58:07,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544813489] [2023-11-21 20:58:07,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:07,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 20:58:07,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:58:07,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 20:58:07,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:58:07,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 50 [2023-11-21 20:58:07,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 42 transitions, 206 flow. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:07,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:58:07,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 50 [2023-11-21 20:58:07,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:58:08,458 INFO L124 PetriNetUnfolderBase]: 837/1746 cut-off events. [2023-11-21 20:58:08,458 INFO L125 PetriNetUnfolderBase]: For 2311/2315 co-relation queries the response was YES. [2023-11-21 20:58:08,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5013 conditions, 1746 events. 837/1746 cut-off events. For 2311/2315 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10997 event pairs, 599 based on Foata normal form. 4/1744 useless extension candidates. Maximal degree in co-relation 4992. Up to 1101 conditions per place. [2023-11-21 20:58:08,473 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 50 selfloop transitions, 9 changer transitions 3/70 dead transitions. [2023-11-21 20:58:08,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 70 transitions, 462 flow [2023-11-21 20:58:08,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:58:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 20:58:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 176 transitions. [2023-11-21 20:58:08,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.704 [2023-11-21 20:58:08,476 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 176 transitions. [2023-11-21 20:58:08,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 176 transitions. [2023-11-21 20:58:08,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:58:08,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 176 transitions. [2023-11-21 20:58:08,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:08,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 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) [2023-11-21 20:58:08,479 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 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) [2023-11-21 20:58:08,479 INFO L175 Difference]: Start difference. First operand has 65 places, 42 transitions, 206 flow. Second operand 5 states and 176 transitions. [2023-11-21 20:58:08,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 70 transitions, 462 flow [2023-11-21 20:58:08,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 70 transitions, 438 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-21 20:58:08,486 INFO L231 Difference]: Finished difference. Result has 68 places, 47 transitions, 267 flow [2023-11-21 20:58:08,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=68, PETRI_TRANSITIONS=47} [2023-11-21 20:58:08,486 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 19 predicate places. [2023-11-21 20:58:08,487 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 47 transitions, 267 flow [2023-11-21 20:58:08,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:08,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:58:08,488 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:08,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:08,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:58:08,692 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:58:08,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:08,693 INFO L85 PathProgramCache]: Analyzing trace with hash -676238563, now seen corresponding path program 1 times [2023-11-21 20:58:08,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:58:08,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892095889] [2023-11-21 20:58:08,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:08,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:58:08,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:58:08,694 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:58:08,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:58:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:08,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 20:58:08,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:58:08,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:58:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:58:09,052 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:58:09,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892095889] [2023-11-21 20:58:09,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892095889] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:09,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:58:09,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-21 20:58:09,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983821420] [2023-11-21 20:58:09,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:09,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:58:09,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:58:09,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:58:09,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-21 20:58:09,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 50 [2023-11-21 20:58:09,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 47 transitions, 267 flow. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:09,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:58:09,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 50 [2023-11-21 20:58:09,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:58:09,745 INFO L124 PetriNetUnfolderBase]: 911/1924 cut-off events. [2023-11-21 20:58:09,745 INFO L125 PetriNetUnfolderBase]: For 2693/2693 co-relation queries the response was YES. [2023-11-21 20:58:09,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5496 conditions, 1924 events. 911/1924 cut-off events. For 2693/2693 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 12338 event pairs, 52 based on Foata normal form. 27/1947 useless extension candidates. Maximal degree in co-relation 5473. Up to 895 conditions per place. [2023-11-21 20:58:09,760 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 61 selfloop transitions, 24 changer transitions 4/97 dead transitions. [2023-11-21 20:58:09,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 97 transitions, 719 flow [2023-11-21 20:58:09,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 20:58:09,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 20:58:09,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 234 transitions. [2023-11-21 20:58:09,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6685714285714286 [2023-11-21 20:58:09,762 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 234 transitions. [2023-11-21 20:58:09,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 234 transitions. [2023-11-21 20:58:09,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:58:09,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 234 transitions. [2023-11-21 20:58:09,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 33.42857142857143) internal successors, (234), 7 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:09,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 50.0) internal successors, (400), 8 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:09,765 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 50.0) internal successors, (400), 8 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:09,765 INFO L175 Difference]: Start difference. First operand has 68 places, 47 transitions, 267 flow. Second operand 7 states and 234 transitions. [2023-11-21 20:58:09,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 97 transitions, 719 flow [2023-11-21 20:58:09,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 97 transitions, 708 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 20:58:09,774 INFO L231 Difference]: Finished difference. Result has 77 places, 63 transitions, 480 flow [2023-11-21 20:58:09,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=480, PETRI_PLACES=77, PETRI_TRANSITIONS=63} [2023-11-21 20:58:09,775 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 28 predicate places. [2023-11-21 20:58:09,775 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 63 transitions, 480 flow [2023-11-21 20:58:09,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:09,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:58:09,776 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:09,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:09,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 20:58:09,980 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:58:09,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:09,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1971327015, now seen corresponding path program 2 times [2023-11-21 20:58:09,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 20:58:09,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356991420] [2023-11-21 20:58:09,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 20:58:09,981 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 [2023-11-21 20:58:09,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 20:58:09,982 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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) [2023-11-21 20:58:09,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaf88941-7591-455a-a97b-f36863a72ef1/bin/uautomizer-verify-bycVGegfSx/mathsat -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 [2023-11-21 20:58:10,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 20:58:10,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 20:58:10,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 20:58:10,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:58:10,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:58:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 20:58:10,466 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 20:58:10,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356991420] [2023-11-21 20:58:10,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356991420] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:58:10,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 20:58:10,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-21 20:58:10,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344361017] [2023-11-21 20:58:10,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 20:58:10,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 20:58:10,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 20:58:10,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 20:58:10,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:10,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 50 [2023-11-21 20:58:10,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 63 transitions, 480 flow. Second operand has 8 states, 8 states have (on average 28.375) internal successors, (227), 8 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 20:58:10,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:58:10,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 50 [2023-11-21 20:58:10,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand