./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI --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 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:44:32,248 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:44:32,388 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:44:32,402 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:44:32,403 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:44:32,450 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:44:32,452 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:44:32,453 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:44:32,454 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:44:32,460 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:44:32,461 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:44:32,462 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:44:32,463 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:44:32,465 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:44:32,466 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:44:32,466 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:44:32,467 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:44:32,468 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:44:32,469 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:44:32,469 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:44:32,470 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:44:32,471 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:44:32,471 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:44:32,472 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:44:32,473 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:44:32,473 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:44:32,474 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:44:32,474 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:44:32,476 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:44:32,476 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:44:32,478 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:44:32,478 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:44:32,479 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:44:32,479 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:44:32,480 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:44:32,480 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:44:32,481 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:44:32,481 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:44:32,481 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:44:32,482 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:44:32,482 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:44:32,483 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_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 [2023-11-24 21:44:32,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:44:32,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:44:32,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:44:32,869 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:44:32,870 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:44:32,872 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2023-11-24 21:44:36,037 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:44:36,256 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:44:36,257 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2023-11-24 21:44:36,266 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/data/a9f5117fc/84cef690c76d457ab3c558b667bbbb4e/FLAG9afedb5c9 [2023-11-24 21:44:36,285 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/data/a9f5117fc/84cef690c76d457ab3c558b667bbbb4e [2023-11-24 21:44:36,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:44:36,292 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:44:36,296 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:44:36,297 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:44:36,304 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:44:36,305 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:44:36" (1/1) ... [2023-11-24 21:44:36,307 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b6e6dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:36, skipping insertion in model container [2023-11-24 21:44:36,307 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:44:36" (1/1) ... [2023-11-24 21:44:36,333 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:44:36,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:44:36,565 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) [2023-11-24 21:44:36,566 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@47875152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:36, skipping insertion in model container [2023-11-24 21:44:36,566 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:44:36,567 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-24 21:44:36,569 INFO L158 Benchmark]: Toolchain (without parser) took 276.11ms. Allocated memory is still 155.2MB. Free memory was 108.9MB in the beginning and 99.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 21:44:36,569 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 123.7MB. Free memory is still 69.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 21:44:36,570 INFO L158 Benchmark]: CACSL2BoogieTranslator took 270.96ms. Allocated memory is still 155.2MB. Free memory was 108.9MB in the beginning and 99.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 21:44:36,572 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 123.7MB. Free memory is still 69.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 270.96ms. Allocated memory is still 155.2MB. Free memory was 108.9MB in the beginning and 99.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI --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 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:44:39,130 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:44:39,281 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-24 21:44:39,291 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:44:39,292 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:44:39,333 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:44:39,334 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:44:39,335 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:44:39,336 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:44:39,342 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:44:39,342 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:44:39,343 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:44:39,344 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:44:39,346 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:44:39,346 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:44:39,347 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:44:39,348 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:44:39,348 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:44:39,349 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:44:39,349 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:44:39,350 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:44:39,350 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:44:39,351 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:44:39,351 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:44:39,352 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:44:39,353 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 21:44:39,353 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 21:44:39,354 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:44:39,354 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:44:39,355 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:44:39,357 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:44:39,358 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:44:39,358 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:44:39,358 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:44:39,359 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:44:39,359 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:44:39,360 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:44:39,361 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-24 21:44:39,361 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 21:44:39,361 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:44:39,362 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:44:39,362 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:44:39,362 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:44:39,362 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-24 21:44:39,363 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_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 [2023-11-24 21:44:39,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:44:39,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:44:39,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:44:39,873 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:44:39,875 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:44:39,876 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2023-11-24 21:44:43,343 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:44:43,682 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:44:43,683 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2023-11-24 21:44:43,696 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/data/790820c1b/08fb3332246f4b1f9719d6bede13d5c3/FLAG260ab5531 [2023-11-24 21:44:43,716 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/data/790820c1b/08fb3332246f4b1f9719d6bede13d5c3 [2023-11-24 21:44:43,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:44:43,724 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:44:43,730 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:44:43,730 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:44:43,736 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:44:43,737 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:44:43" (1/1) ... [2023-11-24 21:44:43,738 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57a6e952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:43, skipping insertion in model container [2023-11-24 21:44:43,738 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:44:43" (1/1) ... [2023-11-24 21:44:43,775 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:44:44,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:44:44,057 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-24 21:44:44,062 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:44:44,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:44:44,111 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:44:44,144 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:44:44,160 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:44:44,160 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:44:44,169 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:44:44,170 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:44 WrapperNode [2023-11-24 21:44:44,170 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:44:44,171 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:44:44,171 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:44:44,172 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:44:44,180 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:44" (1/1) ... [2023-11-24 21:44:44,198 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:44" (1/1) ... [2023-11-24 21:44:44,251 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 12, calls inlined = 14, statements flattened = 196 [2023-11-24 21:44:44,262 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:44:44,263 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:44:44,264 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:44:44,264 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:44:44,278 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:44" (1/1) ... [2023-11-24 21:44:44,278 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:44" (1/1) ... [2023-11-24 21:44:44,285 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:44" (1/1) ... [2023-11-24 21:44:44,320 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 2, 2, 8]. 57 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 2]. [2023-11-24 21:44:44,333 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:44" (1/1) ... [2023-11-24 21:44:44,333 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:44" (1/1) ... [2023-11-24 21:44:44,364 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:44" (1/1) ... [2023-11-24 21:44:44,369 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:44" (1/1) ... [2023-11-24 21:44:44,381 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:44" (1/1) ... [2023-11-24 21:44:44,384 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:44" (1/1) ... [2023-11-24 21:44:44,389 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:44:44,398 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:44:44,398 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:44:44,398 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:44:44,399 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:44" (1/1) ... [2023-11-24 21:44:44,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:44:44,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:44,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:44:44,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:44:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:44:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-24 21:44:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-24 21:44:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-24 21:44:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-24 21:44:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:44:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-24 21:44:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-24 21:44:44,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-24 21:44:44,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-24 21:44:44,487 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:44:44,487 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:44:44,487 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:44:44,488 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:44:44,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:44:44,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:44:44,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:44:44,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:44:44,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:44:44,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:44:44,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-24 21:44:44,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-24 21:44:44,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-24 21:44:44,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-24 21:44:44,496 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:44:44,724 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:44:44,726 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:44:45,503 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:44:45,979 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:44:45,979 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 21:44:45,980 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:44:45 BoogieIcfgContainer [2023-11-24 21:44:45,980 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:44:45,983 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:44:45,983 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:44:45,986 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:44:45,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:44:43" (1/3) ... [2023-11-24 21:44:45,987 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26ff7dd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:44:45, skipping insertion in model container [2023-11-24 21:44:45,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:44" (2/3) ... [2023-11-24 21:44:45,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26ff7dd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:44:45, skipping insertion in model container [2023-11-24 21:44:45,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:44:45" (3/3) ... [2023-11-24 21:44:45,992 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2023-11-24 21:44:46,014 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:44:46,014 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-24 21:44:46,014 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:44:46,104 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 21:44:46,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 146 flow [2023-11-24 21:44:46,219 INFO L124 PetriNetUnfolderBase]: 5/64 cut-off events. [2023-11-24 21:44:46,220 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:44:46,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 64 events. 5/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 173 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2023-11-24 21:44:46,228 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 146 flow [2023-11-24 21:44:46,234 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 63 transitions, 138 flow [2023-11-24 21:44:46,254 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:44:46,263 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;@4b7f9d38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:44:46,264 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-11-24 21:44:46,271 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:44:46,271 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-24 21:44:46,271 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:44:46,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:46,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:44:46,273 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:44:46,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:46,280 INFO L85 PathProgramCache]: Analyzing trace with hash 590919, now seen corresponding path program 1 times [2023-11-24 21:44:46,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:44:46,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982935721] [2023-11-24 21:44:46,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:46,296 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 [2023-11-24 21:44:46,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:44:46,300 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:44:46,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:44:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:46,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:44:46,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:46,585 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 [2023-11-24 21:44:46,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:46,605 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 [2023-11-24 21:44:46,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:46,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 21:44:46,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:46,637 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 [2023-11-24 21:44:46,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:46,670 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 [2023-11-24 21:44:46,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:46,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:44:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:46,699 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:44:46,699 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:44:46,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982935721] [2023-11-24 21:44:46,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982935721] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:46,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:46,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:44:46,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546950671] [2023-11-24 21:44:46,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:46,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:46,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:44:46,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:46,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:46,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2023-11-24 21:44:46,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 138 flow. Second operand has 3 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) [2023-11-24 21:44:46,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:46,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2023-11-24 21:44:46,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:47,316 INFO L124 PetriNetUnfolderBase]: 299/671 cut-off events. [2023-11-24 21:44:47,316 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-24 21:44:47,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1152 conditions, 671 events. 299/671 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4120 event pairs, 171 based on Foata normal form. 1/383 useless extension candidates. Maximal degree in co-relation 1057. Up to 443 conditions per place. [2023-11-24 21:44:47,329 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 28 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-11-24 21:44:47,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 190 flow [2023-11-24 21:44:47,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:47,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-24 21:44:47,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2023-11-24 21:44:47,346 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-24 21:44:47,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-24 21:44:47,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:47,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-24 21:44:47,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:47,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 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) [2023-11-24 21:44:47,359 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 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) [2023-11-24 21:44:47,361 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 138 flow. Second operand 3 states and 129 transitions. [2023-11-24 21:44:47,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 190 flow [2023-11-24 21:44:47,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 182 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:44:47,370 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 126 flow [2023-11-24 21:44:47,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2023-11-24 21:44:47,376 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -6 predicate places. [2023-11-24 21:44:47,377 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 126 flow [2023-11-24 21:44:47,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-24 21:44:47,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:47,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:44:47,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:47,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:44:47,581 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:44:47,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:47,582 INFO L85 PathProgramCache]: Analyzing trace with hash 590920, now seen corresponding path program 1 times [2023-11-24 21:44:47,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:44:47,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633654410] [2023-11-24 21:44:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:47,583 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 [2023-11-24 21:44:47,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:44:47,585 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:44:47,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:44:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:47,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:44:47,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:47,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-24 21:44:47,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:47,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:44:47,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:47,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:44:47,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:47,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:44:47,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:47,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:44:47,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:47,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:44:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:47,968 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:44:47,969 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:44:47,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633654410] [2023-11-24 21:44:47,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633654410] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:47,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:47,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:44:47,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518146008] [2023-11-24 21:44:47,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:47,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:44:47,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:44:47,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:44:47,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:44:48,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2023-11-24 21:44:48,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:48,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:48,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2023-11-24 21:44:48,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:48,760 INFO L124 PetriNetUnfolderBase]: 301/677 cut-off events. [2023-11-24 21:44:48,760 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-24 21:44:48,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 677 events. 301/677 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4147 event pairs, 171 based on Foata normal form. 0/386 useless extension candidates. Maximal degree in co-relation 1114. Up to 452 conditions per place. [2023-11-24 21:44:48,771 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 31 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2023-11-24 21:44:48,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 65 transitions, 216 flow [2023-11-24 21:44:48,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:44:48,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:44:48,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 168 transitions. [2023-11-24 21:44:48,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2023-11-24 21:44:48,781 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 168 transitions. [2023-11-24 21:44:48,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 168 transitions. [2023-11-24 21:44:48,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:48,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 168 transitions. [2023-11-24 21:44:48,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:48,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:48,791 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:48,791 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 126 flow. Second operand 4 states and 168 transitions. [2023-11-24 21:44:48,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 65 transitions, 216 flow [2023-11-24 21:44:48,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 65 transitions, 210 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:44:48,797 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 178 flow [2023-11-24 21:44:48,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2023-11-24 21:44:48,798 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -2 predicate places. [2023-11-24 21:44:48,799 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 178 flow [2023-11-24 21:44:48,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:48,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:48,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-24 21:44:48,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:49,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:44:49,002 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:44:49,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:49,003 INFO L85 PathProgramCache]: Analyzing trace with hash 18319253, now seen corresponding path program 1 times [2023-11-24 21:44:49,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:44:49,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335958493] [2023-11-24 21:44:49,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:49,004 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 [2023-11-24 21:44:49,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:44:49,006 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:44:49,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:44:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:49,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:44:49,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:49,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 21:44:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:49,138 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:44:49,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:44:49,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335958493] [2023-11-24 21:44:49,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335958493] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:49,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:49,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:44:49,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858422688] [2023-11-24 21:44:49,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:49,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:44:49,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:44:49,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:44:49,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:44:49,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 66 [2023-11-24 21:44:49,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:49,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:49,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 66 [2023-11-24 21:44:49,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:49,693 INFO L124 PetriNetUnfolderBase]: 291/611 cut-off events. [2023-11-24 21:44:49,693 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-24 21:44:49,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1094 conditions, 611 events. 291/611 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3442 event pairs, 171 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 1050. Up to 434 conditions per place. [2023-11-24 21:44:49,701 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 33 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2023-11-24 21:44:49,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 61 transitions, 242 flow [2023-11-24 21:44:49,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:44:49,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:44:49,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2023-11-24 21:44:49,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553030303030303 [2023-11-24 21:44:49,705 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 146 transitions. [2023-11-24 21:44:49,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 146 transitions. [2023-11-24 21:44:49,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:49,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 146 transitions. [2023-11-24 21:44:49,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:49,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:49,711 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:49,711 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 178 flow. Second operand 4 states and 146 transitions. [2023-11-24 21:44:49,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 61 transitions, 242 flow [2023-11-24 21:44:49,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 61 transitions, 242 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:44:49,718 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 176 flow [2023-11-24 21:44:49,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2023-11-24 21:44:49,720 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-11-24 21:44:49,720 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 176 flow [2023-11-24 21:44:49,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:49,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:49,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-24 21:44:49,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-24 21:44:49,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:44:49,924 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:44:49,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:49,925 INFO L85 PathProgramCache]: Analyzing trace with hash 18319254, now seen corresponding path program 1 times [2023-11-24 21:44:49,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:44:49,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838790751] [2023-11-24 21:44:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:49,926 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 [2023-11-24 21:44:49,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:44:49,927 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:44:49,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:44:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:50,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:44:50,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:50,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-24 21:44:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:50,149 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:44:50,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:44:50,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838790751] [2023-11-24 21:44:50,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838790751] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:50,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:50,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:44:50,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728307582] [2023-11-24 21:44:50,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:50,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:44:50,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:44:50,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:44:50,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:44:50,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2023-11-24 21:44:50,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:50,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:50,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2023-11-24 21:44:50,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:51,022 INFO L124 PetriNetUnfolderBase]: 275/607 cut-off events. [2023-11-24 21:44:51,023 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-24 21:44:51,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1062 conditions, 607 events. 275/607 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3574 event pairs, 153 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 1016. Up to 403 conditions per place. [2023-11-24 21:44:51,030 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 31 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-11-24 21:44:51,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 60 transitions, 244 flow [2023-11-24 21:44:51,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:44:51,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:44:51,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 162 transitions. [2023-11-24 21:44:51,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2023-11-24 21:44:51,033 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 162 transitions. [2023-11-24 21:44:51,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 162 transitions. [2023-11-24 21:44:51,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:51,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 162 transitions. [2023-11-24 21:44:51,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:51,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:51,037 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:51,037 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 176 flow. Second operand 4 states and 162 transitions. [2023-11-24 21:44:51,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 60 transitions, 244 flow [2023-11-24 21:44:51,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 60 transitions, 240 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:44:51,041 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 178 flow [2023-11-24 21:44:51,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2023-11-24 21:44:51,043 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-11-24 21:44:51,043 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 178 flow [2023-11-24 21:44:51,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:51,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:51,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:44:51,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-24 21:44:51,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:44:51,247 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:44:51,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:51,248 INFO L85 PathProgramCache]: Analyzing trace with hash 567897458, now seen corresponding path program 1 times [2023-11-24 21:44:51,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:44:51,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278377200] [2023-11-24 21:44:51,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:51,249 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 [2023-11-24 21:44:51,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:44:51,250 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:44:51,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:44:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:51,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:44:51,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:51,418 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:44:51,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:44:51,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278377200] [2023-11-24 21:44:51,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278377200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:51,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:51,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:44:51,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198007488] [2023-11-24 21:44:51,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:51,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:51,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:44:51,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:51,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:51,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 66 [2023-11-24 21:44:51,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:51,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:51,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 66 [2023-11-24 21:44:51,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:51,761 INFO L124 PetriNetUnfolderBase]: 274/606 cut-off events. [2023-11-24 21:44:51,762 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-24 21:44:51,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1059 conditions, 606 events. 274/606 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3559 event pairs, 153 based on Foata normal form. 1/370 useless extension candidates. Maximal degree in co-relation 1016. Up to 411 conditions per place. [2023-11-24 21:44:51,769 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 31 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-11-24 21:44:51,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 59 transitions, 237 flow [2023-11-24 21:44:51,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:51,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:51,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 134 transitions. [2023-11-24 21:44:51,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6767676767676768 [2023-11-24 21:44:51,771 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 134 transitions. [2023-11-24 21:44:51,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 134 transitions. [2023-11-24 21:44:51,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:51,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 134 transitions. [2023-11-24 21:44:51,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:51,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 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) [2023-11-24 21:44:51,774 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 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) [2023-11-24 21:44:51,774 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 178 flow. Second operand 3 states and 134 transitions. [2023-11-24 21:44:51,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 59 transitions, 237 flow [2023-11-24 21:44:51,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 59 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:44:51,778 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 170 flow [2023-11-24 21:44:51,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2023-11-24 21:44:51,779 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-11-24 21:44:51,779 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 170 flow [2023-11-24 21:44:51,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:51,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:51,780 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-24 21:44:51,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:44:51,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:44:51,983 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:44:51,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:51,984 INFO L85 PathProgramCache]: Analyzing trace with hash 567893245, now seen corresponding path program 1 times [2023-11-24 21:44:51,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:44:51,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191243237] [2023-11-24 21:44:51,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:51,984 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 [2023-11-24 21:44:51,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:44:51,986 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:44:51,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:44:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:52,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:44:52,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:52,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-24 21:44:52,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:52,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:44:52,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:52,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:44:52,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:52,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:44:52,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:52,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:44:52,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:52,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:44:52,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:52,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:52,970 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:44:52,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191243237] [2023-11-24 21:44:52,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191243237] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:52,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:44:52,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:44:52,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111214701] [2023-11-24 21:44:52,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:52,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:44:52,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:44:52,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:44:52,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:44:54,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2023-11-24 21:44:54,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 170 flow. Second operand has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:54,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:54,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2023-11-24 21:44:54,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:56,787 INFO L124 PetriNetUnfolderBase]: 280/624 cut-off events. [2023-11-24 21:44:56,787 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-24 21:44:56,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1128 conditions, 624 events. 280/624 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3594 event pairs, 153 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 1050. Up to 414 conditions per place. [2023-11-24 21:44:56,795 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 30 selfloop transitions, 24 changer transitions 0/77 dead transitions. [2023-11-24 21:44:56,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 77 transitions, 368 flow [2023-11-24 21:44:56,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:44:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:44:56,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 380 transitions. [2023-11-24 21:44:56,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2023-11-24 21:44:56,798 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 380 transitions. [2023-11-24 21:44:56,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 380 transitions. [2023-11-24 21:44:56,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:56,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 380 transitions. [2023-11-24 21:44:56,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 38.0) internal successors, (380), 10 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:56,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:56,804 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:56,804 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 170 flow. Second operand 10 states and 380 transitions. [2023-11-24 21:44:56,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 77 transitions, 368 flow [2023-11-24 21:44:56,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 77 transitions, 362 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:44:56,808 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 336 flow [2023-11-24 21:44:56,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=336, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2023-11-24 21:44:56,810 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 8 predicate places. [2023-11-24 21:44:56,810 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 336 flow [2023-11-24 21:44:56,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:56,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:56,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:56,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:44:57,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:44:57,014 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:44:57,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:57,014 INFO L85 PathProgramCache]: Analyzing trace with hash 288696349, now seen corresponding path program 1 times [2023-11-24 21:44:57,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:44:57,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257650733] [2023-11-24 21:44:57,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:57,015 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 [2023-11-24 21:44:57,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:44:57,016 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:44:57,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:44:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:57,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:44:57,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:57,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:57,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:57,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-11-24 21:44:57,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:57,302 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-24 21:44:57,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-24 21:44:57,381 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:44:57,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-24 21:44:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:44:57,470 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:44:57,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:44:57,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257650733] [2023-11-24 21:44:57,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257650733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:57,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:57,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:44:57,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009708195] [2023-11-24 21:44:57,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:57,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:57,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:44:57,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:57,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:57,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2023-11-24 21:44:57,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 336 flow. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:57,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:44:57,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2023-11-24 21:44:57,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:44:57,908 INFO L124 PetriNetUnfolderBase]: 280/603 cut-off events. [2023-11-24 21:44:57,908 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-24 21:44:57,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1148 conditions, 603 events. 280/603 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3372 event pairs, 153 based on Foata normal form. 55/441 useless extension candidates. Maximal degree in co-relation 1083. Up to 431 conditions per place. [2023-11-24 21:44:57,915 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 51 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2023-11-24 21:44:57,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 75 transitions, 436 flow [2023-11-24 21:44:57,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:44:57,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2023-11-24 21:44:57,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6414141414141414 [2023-11-24 21:44:57,918 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 127 transitions. [2023-11-24 21:44:57,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 127 transitions. [2023-11-24 21:44:57,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:44:57,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 127 transitions. [2023-11-24 21:44:57,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:57,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 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) [2023-11-24 21:44:57,920 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 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) [2023-11-24 21:44:57,920 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 336 flow. Second operand 3 states and 127 transitions. [2023-11-24 21:44:57,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 75 transitions, 436 flow [2023-11-24 21:44:57,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 75 transitions, 375 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-11-24 21:44:57,926 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 273 flow [2023-11-24 21:44:57,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2023-11-24 21:44:57,928 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2023-11-24 21:44:57,928 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 273 flow [2023-11-24 21:44:57,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:57,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:44:57,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:57,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:44:58,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:44:58,132 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:44:58,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:58,132 INFO L85 PathProgramCache]: Analyzing trace with hash 288696350, now seen corresponding path program 1 times [2023-11-24 21:44:58,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:44:58,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673883079] [2023-11-24 21:44:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:58,133 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 [2023-11-24 21:44:58,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:44:58,134 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:44:58,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:44:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:58,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-24 21:44:58,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:58,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:58,317 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 [2023-11-24 21:44:58,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:58,337 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 [2023-11-24 21:44:58,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:58,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:58,372 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 [2023-11-24 21:44:58,386 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 [2023-11-24 21:44:58,477 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:44:58,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-24 21:44:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:58,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:59,650 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:44:59,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673883079] [2023-11-24 21:44:59,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673883079] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:59,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:44:59,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-11-24 21:44:59,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465098084] [2023-11-24 21:44:59,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:59,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:44:59,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:44:59,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:44:59,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:45:01,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2023-11-24 21:45:01,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 273 flow. Second operand has 11 states, 11 states have (on average 31.272727272727273) internal successors, (344), 11 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) [2023-11-24 21:45:01,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:01,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2023-11-24 21:45:01,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:03,762 INFO L124 PetriNetUnfolderBase]: 856/1562 cut-off events. [2023-11-24 21:45:03,762 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-24 21:45:03,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2905 conditions, 1562 events. 856/1562 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 9891 event pairs, 492 based on Foata normal form. 0/1021 useless extension candidates. Maximal degree in co-relation 2892. Up to 619 conditions per place. [2023-11-24 21:45:03,780 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 65 selfloop transitions, 13 changer transitions 0/97 dead transitions. [2023-11-24 21:45:03,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 97 transitions, 477 flow [2023-11-24 21:45:03,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:45:03,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:45:03,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 370 transitions. [2023-11-24 21:45:03,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2023-11-24 21:45:03,784 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 370 transitions. [2023-11-24 21:45:03,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 370 transitions. [2023-11-24 21:45:03,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:03,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 370 transitions. [2023-11-24 21:45:03,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:03,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:03,789 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:03,789 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 273 flow. Second operand 10 states and 370 transitions. [2023-11-24 21:45:03,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 97 transitions, 477 flow [2023-11-24 21:45:03,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 97 transitions, 476 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:45:03,794 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 294 flow [2023-11-24 21:45:03,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=294, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2023-11-24 21:45:03,795 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 10 predicate places. [2023-11-24 21:45:03,795 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 294 flow [2023-11-24 21:45:03,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.272727272727273) internal successors, (344), 11 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) [2023-11-24 21:45:03,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:03,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:03,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:45:04,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:45:04,001 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:45:04,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:04,001 INFO L85 PathProgramCache]: Analyzing trace with hash 2028997594, now seen corresponding path program 1 times [2023-11-24 21:45:04,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:45:04,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499478293] [2023-11-24 21:45:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:04,002 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 [2023-11-24 21:45:04,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:45:04,004 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:45:04,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:45:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:04,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:45:04,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:04,219 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-24 21:45:04,220 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 19 treesize of output 15 [2023-11-24 21:45:04,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:45:04,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:45:04,262 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 21:45:04,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-24 21:45:04,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:45:04,277 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 21:45:04,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-24 21:45:04,306 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:45:04,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-24 21:45:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:45:04,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:45:04,345 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:45:04,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499478293] [2023-11-24 21:45:04,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499478293] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:04,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:04,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:45:04,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193409620] [2023-11-24 21:45:04,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:04,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:45:04,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:45:04,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:45:04,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:45:04,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2023-11-24 21:45:04,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 294 flow. Second operand has 3 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) [2023-11-24 21:45:04,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:04,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2023-11-24 21:45:04,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:04,782 INFO L124 PetriNetUnfolderBase]: 592/1180 cut-off events. [2023-11-24 21:45:04,782 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-24 21:45:04,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2192 conditions, 1180 events. 592/1180 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 7373 event pairs, 332 based on Foata normal form. 0/801 useless extension candidates. Maximal degree in co-relation 2178. Up to 904 conditions per place. [2023-11-24 21:45:04,795 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 53 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-11-24 21:45:04,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 398 flow [2023-11-24 21:45:04,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:45:04,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:45:04,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2023-11-24 21:45:04,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212121212121212 [2023-11-24 21:45:04,797 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 123 transitions. [2023-11-24 21:45:04,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 123 transitions. [2023-11-24 21:45:04,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:04,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 123 transitions. [2023-11-24 21:45:04,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:04,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 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) [2023-11-24 21:45:04,800 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 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) [2023-11-24 21:45:04,800 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 294 flow. Second operand 3 states and 123 transitions. [2023-11-24 21:45:04,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 398 flow [2023-11-24 21:45:04,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 371 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-24 21:45:04,804 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 265 flow [2023-11-24 21:45:04,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2023-11-24 21:45:04,806 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 5 predicate places. [2023-11-24 21:45:04,806 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 265 flow [2023-11-24 21:45:04,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-24 21:45:04,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:04,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:04,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:45:05,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:45:05,010 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:45:05,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:05,011 INFO L85 PathProgramCache]: Analyzing trace with hash 2028997595, now seen corresponding path program 1 times [2023-11-24 21:45:05,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:45:05,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236632940] [2023-11-24 21:45:05,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:05,011 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 [2023-11-24 21:45:05,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:45:05,012 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:45:05,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:45:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:05,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 21:45:05,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:05,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:45:05,233 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 [2023-11-24 21:45:05,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-24 21:45:05,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:45:05,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:45:05,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-24 21:45:05,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:45:05,276 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:45:05,327 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:45:05,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-24 21:45:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:05,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:45:06,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:06,274 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:45:06,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236632940] [2023-11-24 21:45:06,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236632940] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:45:06,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:45:06,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-11-24 21:45:06,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408109356] [2023-11-24 21:45:06,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:45:06,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:45:06,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:45:06,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:45:06,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:45:07,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2023-11-24 21:45:07,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 265 flow. Second operand has 11 states, 11 states have (on average 31.636363636363637) internal successors, (348), 11 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:07,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:07,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2023-11-24 21:45:07,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:08,716 INFO L124 PetriNetUnfolderBase]: 592/1162 cut-off events. [2023-11-24 21:45:08,717 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-24 21:45:08,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2157 conditions, 1162 events. 592/1162 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7159 event pairs, 332 based on Foata normal form. 0/786 useless extension candidates. Maximal degree in co-relation 2144. Up to 447 conditions per place. [2023-11-24 21:45:08,727 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 65 selfloop transitions, 13 changer transitions 0/93 dead transitions. [2023-11-24 21:45:08,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 93 transitions, 469 flow [2023-11-24 21:45:08,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:45:08,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:45:08,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 370 transitions. [2023-11-24 21:45:08,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2023-11-24 21:45:08,730 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 370 transitions. [2023-11-24 21:45:08,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 370 transitions. [2023-11-24 21:45:08,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:45:08,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 370 transitions. [2023-11-24 21:45:08,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:08,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:08,735 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:08,735 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 265 flow. Second operand 10 states and 370 transitions. [2023-11-24 21:45:08,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 93 transitions, 469 flow [2023-11-24 21:45:08,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 93 transitions, 468 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:45:08,739 INFO L231 Difference]: Finished difference. Result has 76 places, 69 transitions, 286 flow [2023-11-24 21:45:08,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=286, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2023-11-24 21:45:08,740 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 11 predicate places. [2023-11-24 21:45:08,740 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 286 flow [2023-11-24 21:45:08,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.636363636363637) internal successors, (348), 11 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:08,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:45:08,741 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-24 21:45:08,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:45:08,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:45:08,945 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-24 21:45:08,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:08,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1110995044, now seen corresponding path program 2 times [2023-11-24 21:45:08,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:45:08,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628049564] [2023-11-24 21:45:08,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:45:08,946 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:45:08,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:45:08,947 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 21:45:08,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f343e85-3108-4bc6-8c06-4521a0b40f15/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 21:45:09,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:45:09,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:45:09,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 21:45:09,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:09,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-24 21:45:09,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:45:09,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:45:09,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:45:09,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:45:09,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:45:09,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:45:09,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:45:09,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:45:09,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:45:09,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:45:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:09,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:45:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:10,568 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:45:10,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628049564] [2023-11-24 21:45:10,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628049564] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:45:10,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:45:10,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-24 21:45:10,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647542675] [2023-11-24 21:45:10,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:45:10,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:45:10,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:45:10,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:45:10,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:45:13,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2023-11-24 21:45:13,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 69 transitions, 286 flow. Second operand has 14 states, 14 states have (on average 33.57142857142857) internal successors, (470), 14 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:45:13,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:45:13,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2023-11-24 21:45:13,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:45:20,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 21:45:24,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 21:45:26,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []