./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2c579ed20cf5b381709dcc4ef9fbcf839f80c68ac017a29b947b11bd3a57dd56 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:43:17,197 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:43:17,263 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-28 20:43:17,267 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:43:17,268 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:43:17,291 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:43:17,292 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:43:17,292 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:43:17,293 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:43:17,294 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:43:17,294 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:43:17,295 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:43:17,296 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:43:17,296 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:43:17,297 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:43:17,297 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:43:17,298 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:43:17,298 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:43:17,299 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:43:17,299 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:43:17,300 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-28 20:43:17,301 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-28 20:43:17,301 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-28 20:43:17,301 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:43:17,302 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-28 20:43:17,302 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-28 20:43:17,303 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:43:17,303 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:43:17,304 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:43:17,304 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:43:17,304 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:43:17,305 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:43:17,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:43:17,305 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:43:17,306 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:43:17,306 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:43:17,306 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:43:17,306 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:43:17,306 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:43:17,307 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:43:17,307 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:43:17,307 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c579ed20cf5b381709dcc4ef9fbcf839f80c68ac017a29b947b11bd3a57dd56 [2023-11-28 20:43:17,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:43:17,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:43:17,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:43:17,589 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:43:17,590 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:43:17,591 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2023-11-28 20:43:20,293 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:43:20,469 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:43:20,470 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2023-11-28 20:43:20,478 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/data/2b5b62e18/4dd3be078a5144f899105f009e3a4014/FLAGd4ff258bf [2023-11-28 20:43:20,495 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/data/2b5b62e18/4dd3be078a5144f899105f009e3a4014 [2023-11-28 20:43:20,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:43:20,499 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:43:20,501 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:43:20,501 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:43:20,507 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:43:20,508 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:43:20" (1/1) ... [2023-11-28 20:43:20,509 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@352db00c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:20, skipping insertion in model container [2023-11-28 20:43:20,510 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:43:20" (1/1) ... [2023-11-28 20:43:20,540 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:43:20,755 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:43:20,770 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) [2023-11-28 20:43:20,771 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@8e337a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:20, skipping insertion in model container [2023-11-28 20:43:20,772 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:43:20,772 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-28 20:43:20,774 INFO L158 Benchmark]: Toolchain (without parser) took 273.87ms. Allocated memory is still 203.4MB. Free memory was 157.5MB in the beginning and 147.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-28 20:43:20,775 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 125.8MB. Free memory is still 101.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-28 20:43:20,776 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.03ms. Allocated memory is still 203.4MB. Free memory was 157.0MB in the beginning and 147.5MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-28 20:43:20,778 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 125.8MB. Free memory is still 101.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 271.03ms. Allocated memory is still 203.4MB. Free memory was 157.0MB in the beginning and 147.5MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 79]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2c579ed20cf5b381709dcc4ef9fbcf839f80c68ac017a29b947b11bd3a57dd56 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:43:22,609 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:43:22,696 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-28 20:43:22,703 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:43:22,703 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:43:22,734 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:43:22,735 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:43:22,735 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:43:22,736 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:43:22,737 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:43:22,737 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:43:22,738 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:43:22,739 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:43:22,739 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:43:22,740 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:43:22,740 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:43:22,741 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:43:22,742 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:43:22,742 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:43:22,743 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:43:22,743 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-28 20:43:22,744 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-28 20:43:22,744 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-28 20:43:22,745 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:43:22,745 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-28 20:43:22,746 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-28 20:43:22,746 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-28 20:43:22,747 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-28 20:43:22,747 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:43:22,748 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:43:22,748 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:43:22,749 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:43:22,749 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:43:22,749 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:43:22,750 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:43:22,750 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:43:22,750 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:43:22,751 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-28 20:43:22,751 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-28 20:43:22,751 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:43:22,751 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:43:22,752 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:43:22,752 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:43:22,752 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-28 20:43:22,753 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_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c579ed20cf5b381709dcc4ef9fbcf839f80c68ac017a29b947b11bd3a57dd56 [2023-11-28 20:43:23,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:43:23,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:43:23,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:43:23,137 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:43:23,138 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:43:23,139 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2023-11-28 20:43:26,027 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:43:26,274 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:43:26,275 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2023-11-28 20:43:26,285 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/data/7967d192e/d32efa8409d84592bf0c1db3c6380726/FLAGb4622a84c [2023-11-28 20:43:26,305 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/data/7967d192e/d32efa8409d84592bf0c1db3c6380726 [2023-11-28 20:43:26,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:43:26,310 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:43:26,312 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:43:26,312 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:43:26,318 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:43:26,319 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:43:26" (1/1) ... [2023-11-28 20:43:26,321 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d54362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:26, skipping insertion in model container [2023-11-28 20:43:26,321 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:43:26" (1/1) ... [2023-11-28 20:43:26,353 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:43:26,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:43:26,615 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-28 20:43:26,621 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:43:26,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:43:26,657 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:43:26,691 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:43:26,715 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:43:26,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:26 WrapperNode [2023-11-28 20:43:26,716 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:43:26,717 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:43:26,718 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:43:26,718 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:43:26,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:26" (1/1) ... [2023-11-28 20:43:26,742 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:26" (1/1) ... [2023-11-28 20:43:26,775 INFO L138 Inliner]: procedures = 27, calls = 42, calls flagged for inlining = 14, calls inlined = 18, statements flattened = 191 [2023-11-28 20:43:26,776 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:43:26,777 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:43:26,777 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:43:26,777 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:43:26,791 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:26" (1/1) ... [2023-11-28 20:43:26,792 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:26" (1/1) ... [2023-11-28 20:43:26,799 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:26" (1/1) ... [2023-11-28 20:43:26,826 INFO L175 MemorySlicer]: Split 18 memory accesses to 5 slices as follows [2, 3, 9, 2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 8 writes are split as follows [0, 1, 5, 1, 1]. [2023-11-28 20:43:26,826 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:26" (1/1) ... [2023-11-28 20:43:26,827 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:26" (1/1) ... [2023-11-28 20:43:26,848 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:26" (1/1) ... [2023-11-28 20:43:26,854 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:26" (1/1) ... [2023-11-28 20:43:26,858 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:26" (1/1) ... [2023-11-28 20:43:26,862 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:26" (1/1) ... [2023-11-28 20:43:26,869 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:43:26,870 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:43:26,871 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:43:26,871 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:43:26,872 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:26" (1/1) ... [2023-11-28 20:43:26,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:43:26,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:26,916 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:43:26,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:43:26,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:43:26,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-28 20:43:26,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-28 20:43:26,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-28 20:43:26,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-28 20:43:26,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-28 20:43:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-28 20:43:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-28 20:43:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-28 20:43:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-28 20:43:26,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-28 20:43:26,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 20:43:26,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-28 20:43:26,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-28 20:43:26,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-28 20:43:26,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-28 20:43:26,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-28 20:43:26,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-28 20:43:26,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-28 20:43:26,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-28 20:43:26,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-28 20:43:26,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-28 20:43:26,960 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-28 20:43:26,960 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-28 20:43:26,961 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-28 20:43:26,961 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-28 20:43:26,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-28 20:43:26,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:43:26,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:43:26,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 20:43:26,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-28 20:43:26,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-28 20:43:26,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-28 20:43:26,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-28 20:43:26,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-28 20:43:26,965 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-28 20:43:27,135 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:43:27,138 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:43:28,146 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:43:28,488 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:43:28,489 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-28 20:43:28,489 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:43:28 BoogieIcfgContainer [2023-11-28 20:43:28,489 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:43:28,492 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:43:28,492 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:43:28,496 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:43:28,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:43:26" (1/3) ... [2023-11-28 20:43:28,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5c1b66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:43:28, skipping insertion in model container [2023-11-28 20:43:28,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:43:26" (2/3) ... [2023-11-28 20:43:28,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5c1b66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:43:28, skipping insertion in model container [2023-11-28 20:43:28,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:43:28" (3/3) ... [2023-11-28 20:43:28,499 INFO L112 eAbstractionObserver]: Analyzing ICFG loop-tiling-eq.wvr.c [2023-11-28 20:43:28,521 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:43:28,521 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-11-28 20:43:28,521 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-28 20:43:28,616 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-28 20:43:28,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 79 transitions, 172 flow [2023-11-28 20:43:28,705 INFO L124 PetriNetUnfolderBase]: 7/77 cut-off events. [2023-11-28 20:43:28,705 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-28 20:43:28,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 77 events. 7/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 194 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2023-11-28 20:43:28,710 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 79 transitions, 172 flow [2023-11-28 20:43:28,715 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 76 transitions, 164 flow [2023-11-28 20:43:28,726 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:43:28,734 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;@7e56cefe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:43:28,734 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2023-11-28 20:43:28,738 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 20:43:28,738 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-28 20:43:28,739 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 20:43:28,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:28,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 20:43:28,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:43:28,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:28,746 INFO L85 PathProgramCache]: Analyzing trace with hash 730334, now seen corresponding path program 1 times [2023-11-28 20:43:28,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:43:28,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900603461] [2023-11-28 20:43:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:28,761 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 [2023-11-28 20:43:28,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:43:28,764 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:43:28,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-28 20:43:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:28,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:43:28,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:29,054 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 [2023-11-28 20:43:29,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:29,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-28 20:43:29,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:29,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-28 20:43:29,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:29,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-28 20:43:29,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:29,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-28 20:43:29,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:29,150 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 [2023-11-28 20:43:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:29,162 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:43:29,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:43:29,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900603461] [2023-11-28 20:43:29,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900603461] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:29,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:29,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 20:43:29,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011903721] [2023-11-28 20:43:29,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:29,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:43:29,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:43:29,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:43:29,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:43:29,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2023-11-28 20:43:29,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:29,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:29,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2023-11-28 20:43:29,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:29,843 INFO L124 PetriNetUnfolderBase]: 58/209 cut-off events. [2023-11-28 20:43:29,843 INFO L125 PetriNetUnfolderBase]: For 22/25 co-relation queries the response was YES. [2023-11-28 20:43:29,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 209 events. 58/209 cut-off events. For 22/25 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 876 event pairs, 30 based on Foata normal form. 1/138 useless extension candidates. Maximal degree in co-relation 237. Up to 96 conditions per place. [2023-11-28 20:43:29,849 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 25 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2023-11-28 20:43:29,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 212 flow [2023-11-28 20:43:29,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:43:29,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:43:29,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-11-28 20:43:29,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7088607594936709 [2023-11-28 20:43:29,868 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-11-28 20:43:29,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-11-28 20:43:29,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:29,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-11-28 20:43:29,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 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) [2023-11-28 20:43:29,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:29,882 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:29,884 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 164 flow. Second operand 3 states and 168 transitions. [2023-11-28 20:43:29,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 212 flow [2023-11-28 20:43:29,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 204 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-28 20:43:29,893 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 154 flow [2023-11-28 20:43:29,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2023-11-28 20:43:29,900 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -7 predicate places. [2023-11-28 20:43:29,901 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 154 flow [2023-11-28 20:43:29,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:29,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:29,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 20:43:29,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:43:30,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:43:30,103 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:43:30,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:30,104 INFO L85 PathProgramCache]: Analyzing trace with hash 730335, now seen corresponding path program 1 times [2023-11-28 20:43:30,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:43:30,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971759380] [2023-11-28 20:43:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:30,106 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 [2023-11-28 20:43:30,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:43:30,107 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:43:30,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-28 20:43:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:30,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:43:30,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:30,275 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 [2023-11-28 20:43:30,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:30,307 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 [2023-11-28 20:43:30,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:30,320 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 [2023-11-28 20:43:30,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:30,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-28 20:43:30,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:30,361 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 [2023-11-28 20:43:30,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:30,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-28 20:43:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:30,470 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:43:30,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:43:30,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971759380] [2023-11-28 20:43:30,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971759380] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:30,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:30,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:43:30,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723453817] [2023-11-28 20:43:30,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:30,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:43:30,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:43:30,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:43:30,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:43:30,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2023-11-28 20:43:30,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:30,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:30,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2023-11-28 20:43:30,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:31,583 INFO L124 PetriNetUnfolderBase]: 61/218 cut-off events. [2023-11-28 20:43:31,583 INFO L125 PetriNetUnfolderBase]: For 5/8 co-relation queries the response was YES. [2023-11-28 20:43:31,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 218 events. 61/218 cut-off events. For 5/8 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 914 event pairs, 30 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 288. Up to 110 conditions per place. [2023-11-28 20:43:31,587 INFO L140 encePairwiseOnDemand]: 65/79 looper letters, 30 selfloop transitions, 11 changer transitions 0/80 dead transitions. [2023-11-28 20:43:31,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 80 transitions, 258 flow [2023-11-28 20:43:31,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:43:31,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:43:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 224 transitions. [2023-11-28 20:43:31,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7088607594936709 [2023-11-28 20:43:31,592 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 224 transitions. [2023-11-28 20:43:31,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 224 transitions. [2023-11-28 20:43:31,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:31,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 224 transitions. [2023-11-28 20:43:31,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:31,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:31,598 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:31,598 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 154 flow. Second operand 4 states and 224 transitions. [2023-11-28 20:43:31,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 80 transitions, 258 flow [2023-11-28 20:43:31,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 80 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 20:43:31,601 INFO L231 Difference]: Finished difference. Result has 73 places, 80 transitions, 232 flow [2023-11-28 20:43:31,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=73, PETRI_TRANSITIONS=80} [2023-11-28 20:43:31,602 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -3 predicate places. [2023-11-28 20:43:31,603 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 80 transitions, 232 flow [2023-11-28 20:43:31,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:31,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:31,603 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-28 20:43:31,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-28 20:43:31,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:43:31,804 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:43:31,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:31,805 INFO L85 PathProgramCache]: Analyzing trace with hash 701875935, now seen corresponding path program 1 times [2023-11-28 20:43:31,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:43:31,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80214279] [2023-11-28 20:43:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:31,806 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 [2023-11-28 20:43:31,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:43:31,807 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:43:31,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-28 20:43:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:31,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 20:43:31,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:32,019 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 [2023-11-28 20:43:32,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:32,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-28 20:43:32,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:32,052 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 [2023-11-28 20:43:32,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:32,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-28 20:43:32,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:32,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-28 20:43:32,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:32,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-28 20:43:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:32,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:32,815 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:43:32,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80214279] [2023-11-28 20:43:32,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80214279] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:32,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:43:32,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-28 20:43:32,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365097757] [2023-11-28 20:43:32,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:32,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 20:43:32,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:43:32,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 20:43:32,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-28 20:43:35,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2023-11-28 20:43:35,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 80 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 46.0) internal successors, (460), 10 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:35,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:35,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2023-11-28 20:43:35,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:38,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:43:40,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:43:40,643 INFO L124 PetriNetUnfolderBase]: 70/245 cut-off events. [2023-11-28 20:43:40,643 INFO L125 PetriNetUnfolderBase]: For 9/12 co-relation queries the response was YES. [2023-11-28 20:43:40,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 245 events. 70/245 cut-off events. For 9/12 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1091 event pairs, 30 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 311. Up to 116 conditions per place. [2023-11-28 20:43:40,646 INFO L140 encePairwiseOnDemand]: 65/79 looper letters, 30 selfloop transitions, 38 changer transitions 0/107 dead transitions. [2023-11-28 20:43:40,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 107 transitions, 482 flow [2023-11-28 20:43:40,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:43:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-28 20:43:40,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 527 transitions. [2023-11-28 20:43:40,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6670886075949367 [2023-11-28 20:43:40,651 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 527 transitions. [2023-11-28 20:43:40,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 527 transitions. [2023-11-28 20:43:40,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:40,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 527 transitions. [2023-11-28 20:43:40,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 52.7) internal successors, (527), 10 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:40,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 79.0) internal successors, (869), 11 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:40,658 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 79.0) internal successors, (869), 11 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:40,658 INFO L175 Difference]: Start difference. First operand has 73 places, 80 transitions, 232 flow. Second operand 10 states and 527 transitions. [2023-11-28 20:43:40,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 107 transitions, 482 flow [2023-11-28 20:43:40,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 107 transitions, 482 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-28 20:43:40,663 INFO L231 Difference]: Finished difference. Result has 85 places, 107 transitions, 474 flow [2023-11-28 20:43:40,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=474, PETRI_PLACES=85, PETRI_TRANSITIONS=107} [2023-11-28 20:43:40,664 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 9 predicate places. [2023-11-28 20:43:40,664 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 107 transitions, 474 flow [2023-11-28 20:43:40,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 46.0) internal successors, (460), 10 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:40,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:40,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 20:43:40,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-28 20:43:40,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:43:40,865 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:43:40,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:40,866 INFO L85 PathProgramCache]: Analyzing trace with hash 701861050, now seen corresponding path program 1 times [2023-11-28 20:43:40,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:43:40,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721289280] [2023-11-28 20:43:40,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:40,867 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 [2023-11-28 20:43:40,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:43:40,868 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:43:40,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-28 20:43:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:41,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 20:43:41,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:41,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:41,108 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-28 20:43:41,108 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 [2023-11-28 20:43:41,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:41,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:41,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:41,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-28 20:43:41,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:41,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-28 20:43:41,268 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-28 20:43:41,269 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 [2023-11-28 20:43:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:41,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:43:41,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:43:41,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721289280] [2023-11-28 20:43:41,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721289280] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:41,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:41,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:43:41,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059553455] [2023-11-28 20:43:41,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:41,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:43:41,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:43:41,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:43:41,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:43:41,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 79 [2023-11-28 20:43:41,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 107 transitions, 474 flow. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:41,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:41,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 79 [2023-11-28 20:43:41,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:41,865 INFO L124 PetriNetUnfolderBase]: 70/241 cut-off events. [2023-11-28 20:43:41,865 INFO L125 PetriNetUnfolderBase]: For 39/42 co-relation queries the response was YES. [2023-11-28 20:43:41,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 241 events. 70/241 cut-off events. For 39/42 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1053 event pairs, 30 based on Foata normal form. 13/188 useless extension candidates. Maximal degree in co-relation 434. Up to 140 conditions per place. [2023-11-28 20:43:41,867 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 64 selfloop transitions, 1 changer transitions 0/105 dead transitions. [2023-11-28 20:43:41,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 105 transitions, 600 flow [2023-11-28 20:43:41,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:43:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:43:41,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2023-11-28 20:43:41,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7130801687763713 [2023-11-28 20:43:41,869 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 169 transitions. [2023-11-28 20:43:41,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 169 transitions. [2023-11-28 20:43:41,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:41,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 169 transitions. [2023-11-28 20:43:41,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:41,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:41,871 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:41,871 INFO L175 Difference]: Start difference. First operand has 85 places, 107 transitions, 474 flow. Second operand 3 states and 169 transitions. [2023-11-28 20:43:41,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 105 transitions, 600 flow [2023-11-28 20:43:41,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 105 transitions, 503 flow, removed 29 selfloop flow, removed 4 redundant places. [2023-11-28 20:43:41,878 INFO L231 Difference]: Finished difference. Result has 81 places, 105 transitions, 375 flow [2023-11-28 20:43:41,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=375, PETRI_PLACES=81, PETRI_TRANSITIONS=105} [2023-11-28 20:43:41,880 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 5 predicate places. [2023-11-28 20:43:41,880 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 105 transitions, 375 flow [2023-11-28 20:43:41,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:41,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:41,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 20:43:41,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-28 20:43:42,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:43:42,081 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:43:42,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:42,082 INFO L85 PathProgramCache]: Analyzing trace with hash 701861051, now seen corresponding path program 1 times [2023-11-28 20:43:42,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:43:42,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297848161] [2023-11-28 20:43:42,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:42,082 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 [2023-11-28 20:43:42,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:43:42,083 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:43:42,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-28 20:43:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:42,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:43:42,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:42,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:42,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:42,305 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 [2023-11-28 20:43:42,323 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 [2023-11-28 20:43:42,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:42,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:42,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-28 20:43:42,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:42,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-28 20:43:42,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:42,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-28 20:43:42,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:42,491 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:43:42,491 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:43:42,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297848161] [2023-11-28 20:43:42,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297848161] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:42,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:42,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:43:42,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264424570] [2023-11-28 20:43:42,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:42,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:43:42,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:43:42,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:43:42,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:43:42,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 79 [2023-11-28 20:43:42,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 105 transitions, 375 flow. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:42,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:42,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 79 [2023-11-28 20:43:42,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:43,196 INFO L124 PetriNetUnfolderBase]: 70/237 cut-off events. [2023-11-28 20:43:43,196 INFO L125 PetriNetUnfolderBase]: For 24/27 co-relation queries the response was YES. [2023-11-28 20:43:43,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470 conditions, 237 events. 70/237 cut-off events. For 24/27 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1011 event pairs, 30 based on Foata normal form. 13/187 useless extension candidates. Maximal degree in co-relation 457. Up to 140 conditions per place. [2023-11-28 20:43:43,198 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 64 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2023-11-28 20:43:43,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 103 transitions, 501 flow [2023-11-28 20:43:43,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:43:43,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:43:43,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2023-11-28 20:43:43,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7130801687763713 [2023-11-28 20:43:43,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 169 transitions. [2023-11-28 20:43:43,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 169 transitions. [2023-11-28 20:43:43,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:43,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 169 transitions. [2023-11-28 20:43:43,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:43,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:43,203 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:43,203 INFO L175 Difference]: Start difference. First operand has 81 places, 105 transitions, 375 flow. Second operand 3 states and 169 transitions. [2023-11-28 20:43:43,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 103 transitions, 501 flow [2023-11-28 20:43:43,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 103 transitions, 500 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:43:43,207 INFO L231 Difference]: Finished difference. Result has 80 places, 103 transitions, 372 flow [2023-11-28 20:43:43,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=372, PETRI_PLACES=80, PETRI_TRANSITIONS=103} [2023-11-28 20:43:43,208 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 4 predicate places. [2023-11-28 20:43:43,208 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 103 transitions, 372 flow [2023-11-28 20:43:43,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:43,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:43,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-28 20:43:43,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-28 20:43:43,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:43:43,409 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:43:43,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:43,410 INFO L85 PathProgramCache]: Analyzing trace with hash 282858060, now seen corresponding path program 1 times [2023-11-28 20:43:43,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:43:43,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428146424] [2023-11-28 20:43:43,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:43,410 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 [2023-11-28 20:43:43,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:43:43,411 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:43:43,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-28 20:43:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:43,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 20:43:43,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:43,588 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 [2023-11-28 20:43:43,612 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-28 20:43:43,612 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 [2023-11-28 20:43:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:43,625 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:43:43,632 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:43:43,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428146424] [2023-11-28 20:43:43,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428146424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:43,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:43,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:43:43,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850751606] [2023-11-28 20:43:43,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:43,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:43:43,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:43:43,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:43:43,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:43:43,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2023-11-28 20:43:43,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 103 transitions, 372 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:43,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:43,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2023-11-28 20:43:43,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:44,176 INFO L124 PetriNetUnfolderBase]: 80/238 cut-off events. [2023-11-28 20:43:44,176 INFO L125 PetriNetUnfolderBase]: For 25/28 co-relation queries the response was YES. [2023-11-28 20:43:44,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 238 events. 80/238 cut-off events. For 25/28 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 939 event pairs, 38 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 476. Up to 132 conditions per place. [2023-11-28 20:43:44,181 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 62 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2023-11-28 20:43:44,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 100 transitions, 500 flow [2023-11-28 20:43:44,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:43:44,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:43:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2023-11-28 20:43:44,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6877637130801688 [2023-11-28 20:43:44,183 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 163 transitions. [2023-11-28 20:43:44,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 163 transitions. [2023-11-28 20:43:44,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:44,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 163 transitions. [2023-11-28 20:43:44,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:44,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:44,185 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:44,185 INFO L175 Difference]: Start difference. First operand has 80 places, 103 transitions, 372 flow. Second operand 3 states and 163 transitions. [2023-11-28 20:43:44,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 100 transitions, 500 flow [2023-11-28 20:43:44,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 100 transitions, 499 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:43:44,191 INFO L231 Difference]: Finished difference. Result has 78 places, 100 transitions, 375 flow [2023-11-28 20:43:44,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=375, PETRI_PLACES=78, PETRI_TRANSITIONS=100} [2023-11-28 20:43:44,192 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 2 predicate places. [2023-11-28 20:43:44,193 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 100 transitions, 375 flow [2023-11-28 20:43:44,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:44,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:44,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-28 20:43:44,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-28 20:43:44,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:43:44,397 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:43:44,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:44,397 INFO L85 PathProgramCache]: Analyzing trace with hash 282858061, now seen corresponding path program 1 times [2023-11-28 20:43:44,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:43:44,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509345478] [2023-11-28 20:43:44,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:44,398 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 [2023-11-28 20:43:44,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:43:44,399 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:43:44,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-28 20:43:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:44,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:43:44,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:44,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-28 20:43:44,640 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 [2023-11-28 20:43:44,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:44,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-28 20:43:44,711 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-28 20:43:44,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-28 20:43:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:44,779 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:43:44,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:43:44,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509345478] [2023-11-28 20:43:44,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509345478] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:44,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:44,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:43:44,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693915180] [2023-11-28 20:43:44,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:44,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:43:44,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:43:44,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:43:44,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:43:45,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 79 [2023-11-28 20:43:45,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 100 transitions, 375 flow. Second operand has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:45,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:45,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 79 [2023-11-28 20:43:45,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:46,275 INFO L124 PetriNetUnfolderBase]: 86/257 cut-off events. [2023-11-28 20:43:46,275 INFO L125 PetriNetUnfolderBase]: For 32/35 co-relation queries the response was YES. [2023-11-28 20:43:46,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559 conditions, 257 events. 86/257 cut-off events. For 32/35 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1055 event pairs, 38 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 545. Up to 156 conditions per place. [2023-11-28 20:43:46,277 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 77 selfloop transitions, 9 changer transitions 0/118 dead transitions. [2023-11-28 20:43:46,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 118 transitions, 628 flow [2023-11-28 20:43:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:43:46,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 20:43:46,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 249 transitions. [2023-11-28 20:43:46,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6303797468354431 [2023-11-28 20:43:46,280 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 249 transitions. [2023-11-28 20:43:46,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 249 transitions. [2023-11-28 20:43:46,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:46,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 249 transitions. [2023-11-28 20:43:46,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 49.8) internal successors, (249), 5 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:46,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:46,282 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:46,282 INFO L175 Difference]: Start difference. First operand has 78 places, 100 transitions, 375 flow. Second operand 5 states and 249 transitions. [2023-11-28 20:43:46,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 118 transitions, 628 flow [2023-11-28 20:43:46,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 118 transitions, 623 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:43:46,288 INFO L231 Difference]: Finished difference. Result has 83 places, 103 transitions, 414 flow [2023-11-28 20:43:46,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=414, PETRI_PLACES=83, PETRI_TRANSITIONS=103} [2023-11-28 20:43:46,289 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 7 predicate places. [2023-11-28 20:43:46,289 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 103 transitions, 414 flow [2023-11-28 20:43:46,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:46,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:46,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:43:46,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-28 20:43:46,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:43:46,490 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:43:46,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:46,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1242489619, now seen corresponding path program 1 times [2023-11-28 20:43:46,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:43:46,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737411611] [2023-11-28 20:43:46,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:46,491 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 [2023-11-28 20:43:46,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:43:46,492 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:43:46,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-28 20:43:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:46,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 20:43:46,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:46,747 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-28 20:43:46,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-28 20:43:46,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:46,765 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-28 20:43:46,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-28 20:43:46,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:46,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:46,801 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-28 20:43:46,801 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 [2023-11-28 20:43:46,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:46,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-28 20:43:46,877 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-28 20:43:46,877 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 [2023-11-28 20:43:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:46,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:43:46,956 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:43:46,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737411611] [2023-11-28 20:43:46,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737411611] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:46,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:46,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:43:46,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040357971] [2023-11-28 20:43:46,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:46,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:43:46,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:43:46,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:43:46,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:43:47,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 79 [2023-11-28 20:43:47,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 103 transitions, 414 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:47,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:47,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 79 [2023-11-28 20:43:47,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:47,592 INFO L124 PetriNetUnfolderBase]: 76/244 cut-off events. [2023-11-28 20:43:47,592 INFO L125 PetriNetUnfolderBase]: For 38/41 co-relation queries the response was YES. [2023-11-28 20:43:47,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 244 events. 76/244 cut-off events. For 38/41 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1014 event pairs, 30 based on Foata normal form. 6/199 useless extension candidates. Maximal degree in co-relation 528. Up to 158 conditions per place. [2023-11-28 20:43:47,594 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 67 selfloop transitions, 1 changer transitions 0/101 dead transitions. [2023-11-28 20:43:47,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 101 transitions, 546 flow [2023-11-28 20:43:47,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:43:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:43:47,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2023-11-28 20:43:47,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7130801687763713 [2023-11-28 20:43:47,596 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 169 transitions. [2023-11-28 20:43:47,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 169 transitions. [2023-11-28 20:43:47,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:47,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 169 transitions. [2023-11-28 20:43:47,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:47,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:47,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:47,598 INFO L175 Difference]: Start difference. First operand has 83 places, 103 transitions, 414 flow. Second operand 3 states and 169 transitions. [2023-11-28 20:43:47,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 101 transitions, 546 flow [2023-11-28 20:43:47,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 101 transitions, 537 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 20:43:47,601 INFO L231 Difference]: Finished difference. Result has 81 places, 101 transitions, 403 flow [2023-11-28 20:43:47,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=403, PETRI_PLACES=81, PETRI_TRANSITIONS=101} [2023-11-28 20:43:47,602 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 5 predicate places. [2023-11-28 20:43:47,603 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 101 transitions, 403 flow [2023-11-28 20:43:47,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:47,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:47,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:43:47,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-28 20:43:47,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:43:47,804 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:43:47,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:47,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1242489620, now seen corresponding path program 1 times [2023-11-28 20:43:47,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:43:47,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272249180] [2023-11-28 20:43:47,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:47,805 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 [2023-11-28 20:43:47,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:43:47,805 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:43:47,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-28 20:43:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:48,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 20:43:48,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:48,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:48,040 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 [2023-11-28 20:43:48,046 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 [2023-11-28 20:43:48,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:48,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:48,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-28 20:43:48,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:48,072 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-28 20:43:48,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:48,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-28 20:43:48,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:48,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-28 20:43:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:48,271 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:43:48,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:43:48,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272249180] [2023-11-28 20:43:48,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272249180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:48,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:48,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:43:48,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015849260] [2023-11-28 20:43:48,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:48,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:43:48,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:43:48,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:43:48,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:43:48,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 79 [2023-11-28 20:43:48,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 101 transitions, 403 flow. Second operand has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:48,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:48,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 79 [2023-11-28 20:43:48,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:49,321 INFO L124 PetriNetUnfolderBase]: 76/241 cut-off events. [2023-11-28 20:43:49,321 INFO L125 PetriNetUnfolderBase]: For 32/35 co-relation queries the response was YES. [2023-11-28 20:43:49,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 241 events. 76/241 cut-off events. For 32/35 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1003 event pairs, 30 based on Foata normal form. 6/199 useless extension candidates. Maximal degree in co-relation 523. Up to 158 conditions per place. [2023-11-28 20:43:49,323 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 67 selfloop transitions, 1 changer transitions 0/99 dead transitions. [2023-11-28 20:43:49,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 99 transitions, 535 flow [2023-11-28 20:43:49,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:43:49,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:43:49,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2023-11-28 20:43:49,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7130801687763713 [2023-11-28 20:43:49,326 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 169 transitions. [2023-11-28 20:43:49,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 169 transitions. [2023-11-28 20:43:49,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:49,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 169 transitions. [2023-11-28 20:43:49,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:49,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:49,328 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:49,328 INFO L175 Difference]: Start difference. First operand has 81 places, 101 transitions, 403 flow. Second operand 3 states and 169 transitions. [2023-11-28 20:43:49,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 99 transitions, 535 flow [2023-11-28 20:43:49,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 99 transitions, 534 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:43:49,332 INFO L231 Difference]: Finished difference. Result has 80 places, 99 transitions, 400 flow [2023-11-28 20:43:49,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=400, PETRI_PLACES=80, PETRI_TRANSITIONS=99} [2023-11-28 20:43:49,333 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 4 predicate places. [2023-11-28 20:43:49,334 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 99 transitions, 400 flow [2023-11-28 20:43:49,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:49,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:49,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:43:49,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-11-28 20:43:49,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:43:49,535 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:43:49,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:49,535 INFO L85 PathProgramCache]: Analyzing trace with hash -137496827, now seen corresponding path program 1 times [2023-11-28 20:43:49,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:43:49,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962052485] [2023-11-28 20:43:49,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:49,536 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 [2023-11-28 20:43:49,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:43:49,537 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:43:49,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-28 20:43:49,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:49,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 20:43:49,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:50,708 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:43:50,708 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:43:50,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962052485] [2023-11-28 20:43:50,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962052485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:50,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:50,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:43:50,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392289611] [2023-11-28 20:43:50,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:50,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:43:50,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:43:50,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:43:50,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:43:51,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2023-11-28 20:43:51,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 99 transitions, 400 flow. Second operand has 6 states, 6 states have (on average 48.166666666666664) internal successors, (289), 6 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:51,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:51,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2023-11-28 20:43:51,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:54,538 INFO L124 PetriNetUnfolderBase]: 135/429 cut-off events. [2023-11-28 20:43:54,538 INFO L125 PetriNetUnfolderBase]: For 37/43 co-relation queries the response was YES. [2023-11-28 20:43:54,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 429 events. 135/429 cut-off events. For 37/43 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2209 event pairs, 60 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 823. Up to 162 conditions per place. [2023-11-28 20:43:54,541 INFO L140 encePairwiseOnDemand]: 72/79 looper letters, 97 selfloop transitions, 10 changer transitions 0/137 dead transitions. [2023-11-28 20:43:54,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 137 transitions, 737 flow [2023-11-28 20:43:54,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:43:54,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 20:43:54,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 342 transitions. [2023-11-28 20:43:54,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7215189873417721 [2023-11-28 20:43:54,546 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 342 transitions. [2023-11-28 20:43:54,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 342 transitions. [2023-11-28 20:43:54,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:54,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 342 transitions. [2023-11-28 20:43:54,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:54,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:54,549 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:54,549 INFO L175 Difference]: Start difference. First operand has 80 places, 99 transitions, 400 flow. Second operand 6 states and 342 transitions. [2023-11-28 20:43:54,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 137 transitions, 737 flow [2023-11-28 20:43:54,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 137 transitions, 736 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:43:54,553 INFO L231 Difference]: Finished difference. Result has 86 places, 101 transitions, 434 flow [2023-11-28 20:43:54,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=434, PETRI_PLACES=86, PETRI_TRANSITIONS=101} [2023-11-28 20:43:54,554 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 10 predicate places. [2023-11-28 20:43:54,554 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 101 transitions, 434 flow [2023-11-28 20:43:54,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 48.166666666666664) internal successors, (289), 6 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:54,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:54,555 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-11-28 20:43:54,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-11-28 20:43:54,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:43:54,755 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:43:54,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:54,756 INFO L85 PathProgramCache]: Analyzing trace with hash -100578289, now seen corresponding path program 1 times [2023-11-28 20:43:54,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:43:54,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482537048] [2023-11-28 20:43:54,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:54,756 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 [2023-11-28 20:43:54,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:43:54,757 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:43:54,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-28 20:43:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:54,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-28 20:43:54,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:55,010 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 [2023-11-28 20:43:55,020 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 [2023-11-28 20:43:55,085 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-28 20:43:55,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-28 20:43:55,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-28 20:43:55,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:43:55,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-28 20:43:55,289 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-28 20:43:55,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-28 20:43:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:55,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:55,675 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:43:55,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 74 [2023-11-28 20:43:56,747 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-28 20:43:56,748 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-28 20:43:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:56,753 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:43:56,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482537048] [2023-11-28 20:43:56,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482537048] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:56,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:43:56,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2023-11-28 20:43:56,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386090069] [2023-11-28 20:43:56,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:56,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-28 20:43:56,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:43:56,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-28 20:43:56,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:44:00,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:44:03,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:44:10,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:44:12,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:44:14,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:44:19,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:44:23,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:44:28,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:44:33,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:44:37,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:44:43,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:44:46,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:44:50,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:44:54,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:44:57,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:44:58,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 79 [2023-11-28 20:44:58,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 101 transitions, 434 flow. Second operand has 12 states, 12 states have (on average 33.5) internal successors, (402), 12 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:58,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:44:58,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 79 [2023-11-28 20:44:58,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:45:02,028 INFO L124 PetriNetUnfolderBase]: 280/714 cut-off events. [2023-11-28 20:45:02,028 INFO L125 PetriNetUnfolderBase]: For 216/231 co-relation queries the response was YES. [2023-11-28 20:45:02,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1616 conditions, 714 events. 280/714 cut-off events. For 216/231 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3980 event pairs, 175 based on Foata normal form. 0/581 useless extension candidates. Maximal degree in co-relation 1595. Up to 459 conditions per place. [2023-11-28 20:45:02,034 INFO L140 encePairwiseOnDemand]: 72/79 looper letters, 131 selfloop transitions, 23 changer transitions 0/174 dead transitions. [2023-11-28 20:45:02,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 174 transitions, 1115 flow [2023-11-28 20:45:02,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:45:02,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-28 20:45:02,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 455 transitions. [2023-11-28 20:45:02,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.479957805907173 [2023-11-28 20:45:02,039 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 455 transitions. [2023-11-28 20:45:02,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 455 transitions. [2023-11-28 20:45:02,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:45:02,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 455 transitions. [2023-11-28 20:45:02,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 37.916666666666664) internal successors, (455), 12 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:02,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 79.0) internal successors, (1027), 13 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:02,045 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 79.0) internal successors, (1027), 13 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:02,045 INFO L175 Difference]: Start difference. First operand has 86 places, 101 transitions, 434 flow. Second operand 12 states and 455 transitions. [2023-11-28 20:45:02,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 174 transitions, 1115 flow [2023-11-28 20:45:02,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 174 transitions, 1100 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-28 20:45:02,054 INFO L231 Difference]: Finished difference. Result has 98 places, 115 transitions, 565 flow [2023-11-28 20:45:02,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=565, PETRI_PLACES=98, PETRI_TRANSITIONS=115} [2023-11-28 20:45:02,055 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 22 predicate places. [2023-11-28 20:45:02,055 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 115 transitions, 565 flow [2023-11-28 20:45:02,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 33.5) internal successors, (402), 12 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:02,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:45:02,056 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-28 20:45:02,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-28 20:45:02,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:45:02,256 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:45:02,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:45:02,257 INFO L85 PathProgramCache]: Analyzing trace with hash 116567263, now seen corresponding path program 2 times [2023-11-28 20:45:02,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:45:02,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526777791] [2023-11-28 20:45:02,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:45:02,257 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 [2023-11-28 20:45:02,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:45:02,258 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:45:02,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-28 20:45:02,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:45:02,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:45:02,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-28 20:45:02,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:45:02,523 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 [2023-11-28 20:45:02,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:45:02,549 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 [2023-11-28 20:45:02,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:45:02,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-28 20:45:02,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:45:02,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-28 20:45:02,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:45:02,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-28 20:45:02,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:45:02,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-28 20:45:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:45:02,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:45:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:45:04,008 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:45:04,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526777791] [2023-11-28 20:45:04,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526777791] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:45:04,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:45:04,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-28 20:45:04,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622054118] [2023-11-28 20:45:04,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:45:04,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 20:45:04,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:45:04,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 20:45:04,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:45:10,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2023-11-28 20:45:10,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 115 transitions, 565 flow. Second operand has 14 states, 14 states have (on average 46.57142857142857) internal successors, (652), 14 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:10,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:45:10,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2023-11-28 20:45:10,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:45:17,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:45:20,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:45:24,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:45:26,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:45:30,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:45:33,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:45:37,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:45:40,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:45:43,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:45:46,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:45:48,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:45:52,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:45:56,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:45:58,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:46:01,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:46:04,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:46:08,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:46:09,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:46:11,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:46:14,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:46:14,498 INFO L124 PetriNetUnfolderBase]: 179/586 cut-off events. [2023-11-28 20:46:14,499 INFO L125 PetriNetUnfolderBase]: For 403/406 co-relation queries the response was YES. [2023-11-28 20:46:14,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 586 events. 179/586 cut-off events. For 403/406 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3131 event pairs, 60 based on Foata normal form. 42/528 useless extension candidates. Maximal degree in co-relation 1578. Up to 277 conditions per place. [2023-11-28 20:46:14,505 INFO L140 encePairwiseOnDemand]: 65/79 looper letters, 41 selfloop transitions, 106 changer transitions 0/175 dead transitions. [2023-11-28 20:46:14,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 175 transitions, 1201 flow [2023-11-28 20:46:14,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-28 20:46:14,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-28 20:46:14,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1130 transitions. [2023-11-28 20:46:14,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6501726121979287 [2023-11-28 20:46:14,512 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1130 transitions. [2023-11-28 20:46:14,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1130 transitions. [2023-11-28 20:46:14,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:46:14,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1130 transitions. [2023-11-28 20:46:14,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 51.36363636363637) internal successors, (1130), 22 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:14,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 79.0) internal successors, (1817), 23 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:14,524 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 79.0) internal successors, (1817), 23 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:14,524 INFO L175 Difference]: Start difference. First operand has 98 places, 115 transitions, 565 flow. Second operand 22 states and 1130 transitions. [2023-11-28 20:46:14,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 175 transitions, 1201 flow [2023-11-28 20:46:14,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 175 transitions, 1150 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-11-28 20:46:14,534 INFO L231 Difference]: Finished difference. Result has 121 places, 175 transitions, 1158 flow [2023-11-28 20:46:14,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1158, PETRI_PLACES=121, PETRI_TRANSITIONS=175} [2023-11-28 20:46:14,535 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 45 predicate places. [2023-11-28 20:46:14,536 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 175 transitions, 1158 flow [2023-11-28 20:46:14,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.57142857142857) internal successors, (652), 14 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:14,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:46:14,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:46:14,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-11-28 20:46:14,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:46:14,738 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:46:14,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:46:14,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1523207682, now seen corresponding path program 1 times [2023-11-28 20:46:14,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:46:14,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243788678] [2023-11-28 20:46:14,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:46:14,739 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 [2023-11-28 20:46:14,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:46:14,740 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:46:14,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-28 20:46:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:46:14,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:46:14,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:46:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:46:15,036 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:46:15,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:46:15,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243788678] [2023-11-28 20:46:15,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243788678] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:46:15,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:46:15,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:46:15,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745685647] [2023-11-28 20:46:15,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:46:15,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:46:15,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:46:15,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:46:15,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:46:15,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2023-11-28 20:46:15,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 175 transitions, 1158 flow. Second operand has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:15,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:46:15,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2023-11-28 20:46:15,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:46:16,030 INFO L124 PetriNetUnfolderBase]: 341/1118 cut-off events. [2023-11-28 20:46:16,030 INFO L125 PetriNetUnfolderBase]: For 735/744 co-relation queries the response was YES. [2023-11-28 20:46:16,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3445 conditions, 1118 events. 341/1118 cut-off events. For 735/744 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7322 event pairs, 98 based on Foata normal form. 1/925 useless extension candidates. Maximal degree in co-relation 3414. Up to 431 conditions per place. [2023-11-28 20:46:16,038 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 210 selfloop transitions, 20 changer transitions 0/260 dead transitions. [2023-11-28 20:46:16,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 260 transitions, 2149 flow [2023-11-28 20:46:16,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:46:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 20:46:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 350 transitions. [2023-11-28 20:46:16,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7383966244725738 [2023-11-28 20:46:16,041 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 350 transitions. [2023-11-28 20:46:16,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 350 transitions. [2023-11-28 20:46:16,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:46:16,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 350 transitions. [2023-11-28 20:46:16,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 58.333333333333336) internal successors, (350), 6 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:16,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:16,043 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:16,043 INFO L175 Difference]: Start difference. First operand has 121 places, 175 transitions, 1158 flow. Second operand 6 states and 350 transitions. [2023-11-28 20:46:16,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 260 transitions, 2149 flow [2023-11-28 20:46:16,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 260 transitions, 1771 flow, removed 115 selfloop flow, removed 9 redundant places. [2023-11-28 20:46:16,061 INFO L231 Difference]: Finished difference. Result has 120 places, 180 transitions, 984 flow [2023-11-28 20:46:16,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=984, PETRI_PLACES=120, PETRI_TRANSITIONS=180} [2023-11-28 20:46:16,062 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 44 predicate places. [2023-11-28 20:46:16,063 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 180 transitions, 984 flow [2023-11-28 20:46:16,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:16,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:46:16,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:46:16,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-28 20:46:16,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:46:16,264 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:46:16,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:46:16,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1981615844, now seen corresponding path program 1 times [2023-11-28 20:46:16,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:46:16,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602428175] [2023-11-28 20:46:16,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:46:16,265 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 [2023-11-28 20:46:16,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:46:16,266 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:46:16,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-28 20:46:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:46:16,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:46:16,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:46:16,449 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 [2023-11-28 20:46:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:46:16,645 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:46:16,645 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:46:16,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602428175] [2023-11-28 20:46:16,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602428175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:46:16,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:46:16,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:46:16,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930682706] [2023-11-28 20:46:16,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:46:16,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:46:16,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:46:16,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:46:16,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:46:17,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2023-11-28 20:46:17,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 180 transitions, 984 flow. Second operand has 6 states, 6 states have (on average 46.666666666666664) internal successors, (280), 6 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:17,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:46:17,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2023-11-28 20:46:17,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:46:18,399 INFO L124 PetriNetUnfolderBase]: 469/1359 cut-off events. [2023-11-28 20:46:18,399 INFO L125 PetriNetUnfolderBase]: For 1388/1409 co-relation queries the response was YES. [2023-11-28 20:46:18,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3749 conditions, 1359 events. 469/1359 cut-off events. For 1388/1409 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9073 event pairs, 174 based on Foata normal form. 4/1141 useless extension candidates. Maximal degree in co-relation 3715. Up to 652 conditions per place. [2023-11-28 20:46:18,408 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 167 selfloop transitions, 18 changer transitions 0/213 dead transitions. [2023-11-28 20:46:18,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 213 transitions, 1482 flow [2023-11-28 20:46:18,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:46:18,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 20:46:18,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 336 transitions. [2023-11-28 20:46:18,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7088607594936709 [2023-11-28 20:46:18,412 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 336 transitions. [2023-11-28 20:46:18,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 336 transitions. [2023-11-28 20:46:18,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:46:18,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 336 transitions. [2023-11-28 20:46:18,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:18,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:18,414 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:18,414 INFO L175 Difference]: Start difference. First operand has 120 places, 180 transitions, 984 flow. Second operand 6 states and 336 transitions. [2023-11-28 20:46:18,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 213 transitions, 1482 flow [2023-11-28 20:46:18,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 213 transitions, 1480 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-28 20:46:18,447 INFO L231 Difference]: Finished difference. Result has 128 places, 184 transitions, 1057 flow [2023-11-28 20:46:18,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1057, PETRI_PLACES=128, PETRI_TRANSITIONS=184} [2023-11-28 20:46:18,448 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 52 predicate places. [2023-11-28 20:46:18,448 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 184 transitions, 1057 flow [2023-11-28 20:46:18,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 46.666666666666664) internal successors, (280), 6 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:18,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:46:18,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:46:18,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-28 20:46:18,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:46:18,650 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:46:18,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:46:18,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1300549736, now seen corresponding path program 1 times [2023-11-28 20:46:18,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:46:18,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971232368] [2023-11-28 20:46:18,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:46:18,651 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 [2023-11-28 20:46:18,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:46:18,652 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:46:18,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-28 20:46:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:46:18,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:46:18,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:46:18,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:46:18,933 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:46:18,933 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:46:18,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971232368] [2023-11-28 20:46:18,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971232368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:46:18,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:46:18,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:46:18,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239923533] [2023-11-28 20:46:18,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:46:18,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:46:18,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:46:18,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:46:18,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:46:19,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2023-11-28 20:46:19,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 184 transitions, 1057 flow. Second operand has 6 states, 6 states have (on average 49.5) internal successors, (297), 6 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:19,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:46:19,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2023-11-28 20:46:19,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:46:19,731 INFO L124 PetriNetUnfolderBase]: 281/899 cut-off events. [2023-11-28 20:46:19,731 INFO L125 PetriNetUnfolderBase]: For 1036/1039 co-relation queries the response was YES. [2023-11-28 20:46:19,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2916 conditions, 899 events. 281/899 cut-off events. For 1036/1039 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 5338 event pairs, 88 based on Foata normal form. 16/834 useless extension candidates. Maximal degree in co-relation 2877. Up to 518 conditions per place. [2023-11-28 20:46:19,738 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 152 selfloop transitions, 14 changer transitions 19/216 dead transitions. [2023-11-28 20:46:19,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 216 transitions, 1583 flow [2023-11-28 20:46:19,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:46:19,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 20:46:19,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 339 transitions. [2023-11-28 20:46:19,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7151898734177216 [2023-11-28 20:46:19,741 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 339 transitions. [2023-11-28 20:46:19,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 339 transitions. [2023-11-28 20:46:19,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:46:19,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 339 transitions. [2023-11-28 20:46:19,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:19,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:19,745 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:19,745 INFO L175 Difference]: Start difference. First operand has 128 places, 184 transitions, 1057 flow. Second operand 6 states and 339 transitions. [2023-11-28 20:46:19,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 216 transitions, 1583 flow [2023-11-28 20:46:19,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 216 transitions, 1540 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-28 20:46:19,771 INFO L231 Difference]: Finished difference. Result has 129 places, 175 transitions, 979 flow [2023-11-28 20:46:19,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=979, PETRI_PLACES=129, PETRI_TRANSITIONS=175} [2023-11-28 20:46:19,773 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 53 predicate places. [2023-11-28 20:46:19,773 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 175 transitions, 979 flow [2023-11-28 20:46:19,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.5) internal successors, (297), 6 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:19,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:46:19,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:46:19,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-11-28 20:46:19,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:46:19,976 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:46:19,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:46:19,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1537314880, now seen corresponding path program 1 times [2023-11-28 20:46:19,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:46:19,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868612724] [2023-11-28 20:46:19,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:46:19,978 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 [2023-11-28 20:46:19,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:46:19,979 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:46:19,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-28 20:46:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:46:20,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-28 20:46:20,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:46:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:46:25,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:46:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:46:27,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:46:27,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868612724] [2023-11-28 20:46:27,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868612724] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:46:27,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:46:27,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-11-28 20:46:27,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159228731] [2023-11-28 20:46:27,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:46:27,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-28 20:46:27,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:46:27,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-28 20:46:27,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2023-11-28 20:46:33,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2023-11-28 20:46:33,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 175 transitions, 979 flow. Second operand has 20 states, 20 states have (on average 48.4) internal successors, (968), 20 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:33,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:46:33,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2023-11-28 20:46:33,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:46:52,198 INFO L124 PetriNetUnfolderBase]: 666/2193 cut-off events. [2023-11-28 20:46:52,199 INFO L125 PetriNetUnfolderBase]: For 1873/1885 co-relation queries the response was YES. [2023-11-28 20:46:52,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6366 conditions, 2193 events. 666/2193 cut-off events. For 1873/1885 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 17200 event pairs, 176 based on Foata normal form. 1/1869 useless extension candidates. Maximal degree in co-relation 6328. Up to 357 conditions per place. [2023-11-28 20:46:52,228 INFO L140 encePairwiseOnDemand]: 62/79 looper letters, 250 selfloop transitions, 194 changer transitions 0/474 dead transitions. [2023-11-28 20:46:52,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 474 transitions, 3387 flow [2023-11-28 20:46:52,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-28 20:46:52,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-28 20:46:52,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1568 transitions. [2023-11-28 20:46:52,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6616033755274262 [2023-11-28 20:46:52,239 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1568 transitions. [2023-11-28 20:46:52,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1568 transitions. [2023-11-28 20:46:52,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:46:52,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1568 transitions. [2023-11-28 20:46:52,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 52.266666666666666) internal successors, (1568), 30 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:52,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 79.0) internal successors, (2449), 31 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:52,253 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 79.0) internal successors, (2449), 31 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:52,254 INFO L175 Difference]: Start difference. First operand has 129 places, 175 transitions, 979 flow. Second operand 30 states and 1568 transitions. [2023-11-28 20:46:52,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 474 transitions, 3387 flow [2023-11-28 20:46:52,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 474 transitions, 3239 flow, removed 38 selfloop flow, removed 9 redundant places. [2023-11-28 20:46:52,300 INFO L231 Difference]: Finished difference. Result has 155 places, 350 transitions, 2520 flow [2023-11-28 20:46:52,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2520, PETRI_PLACES=155, PETRI_TRANSITIONS=350} [2023-11-28 20:46:52,301 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 79 predicate places. [2023-11-28 20:46:52,301 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 350 transitions, 2520 flow [2023-11-28 20:46:52,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 48.4) internal successors, (968), 20 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:52,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:46:52,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:46:52,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-11-28 20:46:52,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:46:52,503 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:46:52,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:46:52,503 INFO L85 PathProgramCache]: Analyzing trace with hash -990267678, now seen corresponding path program 1 times [2023-11-28 20:46:52,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:46:52,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821995156] [2023-11-28 20:46:52,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:46:52,504 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 [2023-11-28 20:46:52,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:46:52,505 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:46:52,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-28 20:46:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:46:52,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 20:46:52,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:46:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:46:52,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:46:53,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-11-28 20:46:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:46:53,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:46:53,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821995156] [2023-11-28 20:46:53,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821995156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:46:53,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:46:53,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-28 20:46:53,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271135575] [2023-11-28 20:46:53,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:46:53,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 20:46:53,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:46:53,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 20:46:53,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:46:54,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2023-11-28 20:46:54,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 350 transitions, 2520 flow. Second operand has 8 states, 8 states have (on average 48.0) internal successors, (384), 8 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:54,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:46:54,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2023-11-28 20:46:54,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:46:58,063 INFO L124 PetriNetUnfolderBase]: 2024/5679 cut-off events. [2023-11-28 20:46:58,064 INFO L125 PetriNetUnfolderBase]: For 5441/5611 co-relation queries the response was YES. [2023-11-28 20:46:58,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14840 conditions, 5679 events. 2024/5679 cut-off events. For 5441/5611 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 52916 event pairs, 632 based on Foata normal form. 8/4606 useless extension candidates. Maximal degree in co-relation 14796. Up to 1111 conditions per place. [2023-11-28 20:46:58,112 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 453 selfloop transitions, 43 changer transitions 0/524 dead transitions. [2023-11-28 20:46:58,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 524 transitions, 4592 flow [2023-11-28 20:46:58,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-28 20:46:58,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-28 20:46:58,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 615 transitions. [2023-11-28 20:46:58,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7077100115074798 [2023-11-28 20:46:58,116 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 615 transitions. [2023-11-28 20:46:58,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 615 transitions. [2023-11-28 20:46:58,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:46:58,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 615 transitions. [2023-11-28 20:46:58,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 55.90909090909091) internal successors, (615), 11 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:58,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 79.0) internal successors, (948), 12 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:58,121 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 79.0) internal successors, (948), 12 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:58,121 INFO L175 Difference]: Start difference. First operand has 155 places, 350 transitions, 2520 flow. Second operand 11 states and 615 transitions. [2023-11-28 20:46:58,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 524 transitions, 4592 flow [2023-11-28 20:46:58,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 524 transitions, 4585 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-28 20:46:58,184 INFO L231 Difference]: Finished difference. Result has 170 places, 363 transitions, 2704 flow [2023-11-28 20:46:58,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=2515, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2704, PETRI_PLACES=170, PETRI_TRANSITIONS=363} [2023-11-28 20:46:58,185 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 94 predicate places. [2023-11-28 20:46:58,185 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 363 transitions, 2704 flow [2023-11-28 20:46:58,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 48.0) internal successors, (384), 8 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:58,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:46:58,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:46:58,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-11-28 20:46:58,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:46:58,386 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:46:58,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:46:58,386 INFO L85 PathProgramCache]: Analyzing trace with hash -633526231, now seen corresponding path program 1 times [2023-11-28 20:46:58,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:46:58,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010470041] [2023-11-28 20:46:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:46:58,387 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 [2023-11-28 20:46:58,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:46:58,388 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:46:58,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-28 20:46:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:46:58,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 20:46:58,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:46:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:46:58,717 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:46:58,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:46:58,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010470041] [2023-11-28 20:46:58,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010470041] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:46:58,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:46:58,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:46:58,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403995678] [2023-11-28 20:46:58,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:46:58,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:46:58,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:46:58,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:46:58,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:46:59,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2023-11-28 20:46:59,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 363 transitions, 2704 flow. Second operand has 6 states, 6 states have (on average 49.166666666666664) internal successors, (295), 6 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:59,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:46:59,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2023-11-28 20:46:59,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:47:00,885 INFO L124 PetriNetUnfolderBase]: 2122/5408 cut-off events. [2023-11-28 20:47:00,885 INFO L125 PetriNetUnfolderBase]: For 8121/8480 co-relation queries the response was YES. [2023-11-28 20:47:00,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17028 conditions, 5408 events. 2122/5408 cut-off events. For 8121/8480 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 45203 event pairs, 1104 based on Foata normal form. 176/5048 useless extension candidates. Maximal degree in co-relation 16978. Up to 2676 conditions per place. [2023-11-28 20:47:00,927 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 314 selfloop transitions, 44 changer transitions 34/425 dead transitions. [2023-11-28 20:47:00,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 425 transitions, 3936 flow [2023-11-28 20:47:00,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:47:00,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-28 20:47:00,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 387 transitions. [2023-11-28 20:47:00,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6998191681735986 [2023-11-28 20:47:00,930 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 387 transitions. [2023-11-28 20:47:00,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 387 transitions. [2023-11-28 20:47:00,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:47:00,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 387 transitions. [2023-11-28 20:47:00,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 55.285714285714285) internal successors, (387), 7 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:00,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 79.0) internal successors, (632), 8 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:00,933 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 79.0) internal successors, (632), 8 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:00,933 INFO L175 Difference]: Start difference. First operand has 170 places, 363 transitions, 2704 flow. Second operand 7 states and 387 transitions. [2023-11-28 20:47:00,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 425 transitions, 3936 flow [2023-11-28 20:47:00,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 425 transitions, 3894 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-28 20:47:01,000 INFO L231 Difference]: Finished difference. Result has 176 places, 366 transitions, 2838 flow [2023-11-28 20:47:01,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=2669, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2838, PETRI_PLACES=176, PETRI_TRANSITIONS=366} [2023-11-28 20:47:01,001 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 100 predicate places. [2023-11-28 20:47:01,001 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 366 transitions, 2838 flow [2023-11-28 20:47:01,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.166666666666664) internal successors, (295), 6 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:01,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:47:01,002 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1] [2023-11-28 20:47:01,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-11-28 20:47:01,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:47:01,203 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:47:01,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:47:01,203 INFO L85 PathProgramCache]: Analyzing trace with hash 2053088205, now seen corresponding path program 2 times [2023-11-28 20:47:01,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:47:01,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1710126888] [2023-11-28 20:47:01,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:47:01,204 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 [2023-11-28 20:47:01,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:47:01,205 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:47:01,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-28 20:47:01,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:47:01,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:47:01,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-28 20:47:01,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:47:01,683 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 [2023-11-28 20:47:01,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-28 20:47:01,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:47:01,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-28 20:47:01,776 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-28 20:47:01,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-28 20:47:01,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:47:01,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-28 20:47:01,930 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-28 20:47:01,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-28 20:47:02,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:47:02,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-28 20:47:02,085 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-28 20:47:02,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-28 20:47:02,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:47:02,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-28 20:47:02,261 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-28 20:47:02,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-28 20:47:02,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:47:02,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 14 [2023-11-28 20:47:02,458 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-28 20:47:02,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-28 20:47:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:47:02,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:47:02,914 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:47:02,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 74 [2023-11-28 20:47:07,930 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:47:07,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 108 [2023-11-28 20:47:13,558 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:47:13,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 123 [2023-11-28 20:47:20,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:47:20,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 138 [2023-11-28 20:47:27,487 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-28 20:47:27,488 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-28 20:47:27,488 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-28 20:47:27,489 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-28 20:47:27,490 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-28 20:47:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:47:27,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:47:27,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1710126888] [2023-11-28 20:47:27,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1710126888] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:47:27,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:47:27,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-11-28 20:47:27,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267555373] [2023-11-28 20:47:27,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:47:27,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-28 20:47:27,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:47:27,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-28 20:47:27,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=384, Unknown=4, NotChecked=0, Total=506 [2023-11-28 20:47:31,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:47:36,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:47:40,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:47:45,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:47:49,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:47:53,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:47:58,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:48:03,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:48:07,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:48:12,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:48:16,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:48:20,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:48:24,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:48:29,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:48:33,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:48:37,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:48:42,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:48:46,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:48:51,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:48:55,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:48:59,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:49:03,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:49:08,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:49:12,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:49:16,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:49:19,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:49:23,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:49:28,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:49:33,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:49:37,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:49:41,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:49:45,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:49:50,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:49:54,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:49:58,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:50:03,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:50:03,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 79 [2023-11-28 20:50:03,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 366 transitions, 2838 flow. Second operand has 23 states, 23 states have (on average 7.565217391304348) internal successors, (174), 23 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:50:03,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:50:03,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 79 [2023-11-28 20:50:03,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:50:16,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:50:18,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:50:20,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:50:29,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:50:33,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:50:37,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:51:02,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:51:07,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:51:17,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:51:21,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:51:39,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:51:51,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:52:02,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:52:09,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:52:12,193 INFO L124 PetriNetUnfolderBase]: 7371/13601 cut-off events. [2023-11-28 20:52:12,194 INFO L125 PetriNetUnfolderBase]: For 22390/23590 co-relation queries the response was YES. [2023-11-28 20:52:12,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44353 conditions, 13601 events. 7371/13601 cut-off events. For 22390/23590 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 99031 event pairs, 5442 based on Foata normal form. 54/11079 useless extension candidates. Maximal degree in co-relation 44298. Up to 11467 conditions per place. [2023-11-28 20:52:12,312 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 1008 selfloop transitions, 120 changer transitions 0/1132 dead transitions. [2023-11-28 20:52:12,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 1132 transitions, 11562 flow [2023-11-28 20:52:12,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-28 20:52:12,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-28 20:52:12,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 269 transitions. [2023-11-28 20:52:12,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.14804623004953218 [2023-11-28 20:52:12,318 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 269 transitions. [2023-11-28 20:52:12,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 269 transitions. [2023-11-28 20:52:12,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:52:12,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 269 transitions. [2023-11-28 20:52:12,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 11.695652173913043) internal successors, (269), 23 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:52:12,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 79.0) internal successors, (1896), 24 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:52:12,323 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 79.0) internal successors, (1896), 24 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:52:12,324 INFO L175 Difference]: Start difference. First operand has 176 places, 366 transitions, 2838 flow. Second operand 23 states and 269 transitions. [2023-11-28 20:52:12,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 1132 transitions, 11562 flow [2023-11-28 20:52:12,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 1132 transitions, 11527 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-11-28 20:52:12,548 INFO L231 Difference]: Finished difference. Result has 198 places, 432 transitions, 3857 flow [2023-11-28 20:52:12,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=2821, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3857, PETRI_PLACES=198, PETRI_TRANSITIONS=432} [2023-11-28 20:52:12,549 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 122 predicate places. [2023-11-28 20:52:12,549 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 432 transitions, 3857 flow [2023-11-28 20:52:12,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.565217391304348) internal successors, (174), 23 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:52:12,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:52:12,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:52:12,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-11-28 20:52:12,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:52:12,750 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:52:12,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:52:12,750 INFO L85 PathProgramCache]: Analyzing trace with hash 65905866, now seen corresponding path program 1 times [2023-11-28 20:52:12,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:52:12,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283760555] [2023-11-28 20:52:12,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:52:12,751 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 [2023-11-28 20:52:12,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:52:12,752 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:52:12,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-28 20:52:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:52:13,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-28 20:52:13,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:52:13,171 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 [2023-11-28 20:52:13,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:52:13,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-28 20:52:13,273 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-28 20:52:13,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-28 20:52:13,362 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-28 20:52:13,362 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 13 [2023-11-28 20:52:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:52:13,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:52:14,488 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 47 treesize of output 43 [2023-11-28 20:52:14,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:52:14,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:52:14,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283760555] [2023-11-28 20:52:14,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283760555] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:52:14,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:52:14,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-28 20:52:14,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818493710] [2023-11-28 20:52:14,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:52:14,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-28 20:52:14,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:52:14,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-28 20:52:14,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-28 20:52:19,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:52:24,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:52:28,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:52:32,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:52:37,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:52:41,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:52:46,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:52:51,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:52:55,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:53:00,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:53:05,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:53:09,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:53:13,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:53:18,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:53:21,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:53:22,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 79 [2023-11-28 20:53:22,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 432 transitions, 3857 flow. Second operand has 13 states, 13 states have (on average 24.384615384615383) internal successors, (317), 13 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:53:22,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:53:22,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 79 [2023-11-28 20:53:22,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:53:27,716 INFO L124 PetriNetUnfolderBase]: 4930/10484 cut-off events. [2023-11-28 20:53:27,716 INFO L125 PetriNetUnfolderBase]: For 12081/12502 co-relation queries the response was YES. [2023-11-28 20:53:27,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32717 conditions, 10484 events. 4930/10484 cut-off events. For 12081/12502 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 84056 event pairs, 1807 based on Foata normal form. 41/8822 useless extension candidates. Maximal degree in co-relation 32658. Up to 2617 conditions per place. [2023-11-28 20:53:27,793 INFO L140 encePairwiseOnDemand]: 66/79 looper letters, 437 selfloop transitions, 176 changer transitions 1/633 dead transitions. [2023-11-28 20:53:27,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 633 transitions, 6418 flow [2023-11-28 20:53:27,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:53:27,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-28 20:53:27,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 407 transitions. [2023-11-28 20:53:27,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4293248945147679 [2023-11-28 20:53:27,796 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 407 transitions. [2023-11-28 20:53:27,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 407 transitions. [2023-11-28 20:53:27,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:53:27,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 407 transitions. [2023-11-28 20:53:27,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 33.916666666666664) internal successors, (407), 12 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:53:27,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 79.0) internal successors, (1027), 13 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:53:27,799 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 79.0) internal successors, (1027), 13 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:53:27,799 INFO L175 Difference]: Start difference. First operand has 198 places, 432 transitions, 3857 flow. Second operand 12 states and 407 transitions. [2023-11-28 20:53:27,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 633 transitions, 6418 flow [2023-11-28 20:53:27,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 633 transitions, 6032 flow, removed 128 selfloop flow, removed 10 redundant places. [2023-11-28 20:53:27,943 INFO L231 Difference]: Finished difference. Result has 201 places, 475 transitions, 4318 flow [2023-11-28 20:53:27,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=3547, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4318, PETRI_PLACES=201, PETRI_TRANSITIONS=475} [2023-11-28 20:53:27,944 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 125 predicate places. [2023-11-28 20:53:27,944 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 475 transitions, 4318 flow [2023-11-28 20:53:27,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 24.384615384615383) internal successors, (317), 13 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:53:27,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:53:27,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:53:27,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-11-28 20:53:28,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:53:28,145 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:53:28,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:53:28,145 INFO L85 PathProgramCache]: Analyzing trace with hash 65905865, now seen corresponding path program 1 times [2023-11-28 20:53:28,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:53:28,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084743813] [2023-11-28 20:53:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:53:28,146 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 [2023-11-28 20:53:28,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:53:28,147 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:53:28,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-28 20:53:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:53:28,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 20:53:28,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:53:28,512 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 [2023-11-28 20:53:28,567 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2023-11-28 20:53:28,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-11-28 20:53:28,628 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-11-28 20:53:28,629 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 18 treesize of output 28 [2023-11-28 20:53:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:53:28,889 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:53:28,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:53:28,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084743813] [2023-11-28 20:53:28,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084743813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:53:28,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:53:28,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:53:28,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367330248] [2023-11-28 20:53:28,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:53:28,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:53:28,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:53:28,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:53:28,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:53:30,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 79 [2023-11-28 20:53:30,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 475 transitions, 4318 flow. Second operand has 7 states, 7 states have (on average 36.42857142857143) internal successors, (255), 7 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:53:30,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:53:30,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 79 [2023-11-28 20:53:30,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:53:32,806 INFO L124 PetriNetUnfolderBase]: 4517/10336 cut-off events. [2023-11-28 20:53:32,806 INFO L125 PetriNetUnfolderBase]: For 18059/18297 co-relation queries the response was YES. [2023-11-28 20:53:32,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35810 conditions, 10336 events. 4517/10336 cut-off events. For 18059/18297 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 85443 event pairs, 2708 based on Foata normal form. 372/10188 useless extension candidates. Maximal degree in co-relation 35749. Up to 7063 conditions per place. [2023-11-28 20:53:32,878 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 317 selfloop transitions, 136 changer transitions 0/473 dead transitions. [2023-11-28 20:53:32,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 473 transitions, 5220 flow [2023-11-28 20:53:32,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:53:32,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 20:53:32,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 210 transitions. [2023-11-28 20:53:32,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5316455696202531 [2023-11-28 20:53:32,881 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 210 transitions. [2023-11-28 20:53:32,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 210 transitions. [2023-11-28 20:53:32,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:53:32,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 210 transitions. [2023-11-28 20:53:32,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:53:32,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:53:32,883 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:53:32,883 INFO L175 Difference]: Start difference. First operand has 201 places, 475 transitions, 4318 flow. Second operand 5 states and 210 transitions. [2023-11-28 20:53:32,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 473 transitions, 5220 flow [2023-11-28 20:53:33,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 473 transitions, 5193 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-28 20:53:33,046 INFO L231 Difference]: Finished difference. Result has 202 places, 473 transitions, 4559 flow [2023-11-28 20:53:33,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=4287, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4559, PETRI_PLACES=202, PETRI_TRANSITIONS=473} [2023-11-28 20:53:33,047 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 126 predicate places. [2023-11-28 20:53:33,047 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 473 transitions, 4559 flow [2023-11-28 20:53:33,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 36.42857142857143) internal successors, (255), 7 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:53:33,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:53:33,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:53:33,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-11-28 20:53:33,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:53:33,248 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:53:33,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:53:33,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1130436128, now seen corresponding path program 1 times [2023-11-28 20:53:33,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:53:33,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868454393] [2023-11-28 20:53:33,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:53:33,249 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 [2023-11-28 20:53:33,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:53:33,250 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:53:33,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-28 20:53:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:53:33,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-28 20:53:33,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:53:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:53:37,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:53:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:53:39,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:53:39,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868454393] [2023-11-28 20:53:39,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868454393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:53:39,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:53:39,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-28 20:53:39,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83480336] [2023-11-28 20:53:39,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:53:39,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-28 20:53:39,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:53:39,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-28 20:53:39,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:53:42,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2023-11-28 20:53:42,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 473 transitions, 4559 flow. Second operand has 16 states, 16 states have (on average 48.875) internal successors, (782), 16 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:53:42,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:53:42,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2023-11-28 20:53:42,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:53:51,537 INFO L124 PetriNetUnfolderBase]: 2986/7602 cut-off events. [2023-11-28 20:53:51,537 INFO L125 PetriNetUnfolderBase]: For 16506/17073 co-relation queries the response was YES. [2023-11-28 20:53:51,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29668 conditions, 7602 events. 2986/7602 cut-off events. For 16506/17073 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 61833 event pairs, 1435 based on Foata normal form. 44/7220 useless extension candidates. Maximal degree in co-relation 29606. Up to 2489 conditions per place. [2023-11-28 20:53:51,585 INFO L140 encePairwiseOnDemand]: 62/79 looper letters, 301 selfloop transitions, 368 changer transitions 43/745 dead transitions. [2023-11-28 20:53:51,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 745 transitions, 8212 flow [2023-11-28 20:53:51,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-28 20:53:51,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-28 20:53:51,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 864 transitions. [2023-11-28 20:53:51,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6835443037974683 [2023-11-28 20:53:51,593 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 864 transitions. [2023-11-28 20:53:51,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 864 transitions. [2023-11-28 20:53:51,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:53:51,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 864 transitions. [2023-11-28 20:53:51,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 54.0) internal successors, (864), 16 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:53:51,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 79.0) internal successors, (1343), 17 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:53:51,598 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 79.0) internal successors, (1343), 17 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:53:51,598 INFO L175 Difference]: Start difference. First operand has 202 places, 473 transitions, 4559 flow. Second operand 16 states and 864 transitions. [2023-11-28 20:53:51,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 745 transitions, 8212 flow [2023-11-28 20:53:51,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 745 transitions, 7804 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-28 20:53:51,766 INFO L231 Difference]: Finished difference. Result has 222 places, 591 transitions, 6835 flow [2023-11-28 20:53:51,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=4287, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6835, PETRI_PLACES=222, PETRI_TRANSITIONS=591} [2023-11-28 20:53:51,767 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 146 predicate places. [2023-11-28 20:53:51,767 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 591 transitions, 6835 flow [2023-11-28 20:53:51,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 48.875) internal successors, (782), 16 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:53:51,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:53:51,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:53:51,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-11-28 20:53:51,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:53:51,968 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:53:51,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:53:51,968 INFO L85 PathProgramCache]: Analyzing trace with hash 2043082550, now seen corresponding path program 1 times [2023-11-28 20:53:51,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:53:51,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959533243] [2023-11-28 20:53:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:53:51,969 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 [2023-11-28 20:53:51,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:53:51,970 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:53:51,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-11-28 20:53:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:53:52,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-28 20:53:52,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:53:52,415 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 [2023-11-28 20:53:52,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:53:52,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-28 20:53:52,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:53:52,439 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 [2023-11-28 20:53:52,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:53:52,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-28 20:53:52,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:53:52,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-28 20:53:52,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:53:52,500 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 [2023-11-28 20:53:52,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:53:52,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-28 20:53:52,610 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-28 20:53:52,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-28 20:53:52,698 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-28 20:53:52,698 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 13 [2023-11-28 20:53:52,817 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-28 20:53:52,818 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 18 treesize of output 17 [2023-11-28 20:53:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:53:53,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:54:01,525 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv4 32) c_~A~0.offset))) (and (forall ((v_ArrVal_915 (_ BitVec 32)) (v_ArrVal_914 (_ BitVec 32)) (v_~B~0.base_68 (_ BitVec 32))) (or (not (bvule (_ bv4 32) v_ArrVal_915)) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_220| (_ BitVec 32))) (let ((.cse0 (store (store |c_#length| v_~B~0.base_68 v_ArrVal_914) |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_220| v_ArrVal_915))) (or (not (bvule (_ bv4 32) (select .cse0 v_~B~0.base_68))) (bvule .cse1 (select .cse0 c_~A~0.base))))))) (or (forall ((v_ArrVal_915 (_ BitVec 32)) (v_ArrVal_914 (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_220| (_ BitVec 32)) (v_~B~0.base_68 (_ BitVec 32))) (or (not (bvule (_ bv4 32) v_ArrVal_915)) (not (bvule (_ bv4 32) (select (store (store |c_#length| v_~B~0.base_68 v_ArrVal_914) |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_220| v_ArrVal_915) v_~B~0.base_68))))) (bvule c_~A~0.offset .cse1)))) is different from false [2023-11-28 20:54:06,081 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 309 treesize of output 303 [2023-11-28 20:54:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:54:06,947 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:54:06,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959533243] [2023-11-28 20:54:06,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959533243] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:54:06,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:54:06,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2023-11-28 20:54:06,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454064321] [2023-11-28 20:54:06,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:54:06,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-28 20:54:06,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:54:06,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-28 20:54:06,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=187, Unknown=1, NotChecked=28, Total=272 [2023-11-28 20:54:11,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:54:16,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:54:20,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 20:54:20,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 79 [2023-11-28 20:54:20,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 591 transitions, 6835 flow. Second operand has 17 states, 17 states have (on average 7.235294117647059) internal successors, (123), 17 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) [2023-11-28 20:54:20,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:54:20,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 79 [2023-11-28 20:54:20,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:54:34,773 INFO L124 PetriNetUnfolderBase]: 9622/17120 cut-off events. [2023-11-28 20:54:34,773 INFO L125 PetriNetUnfolderBase]: For 31406/31970 co-relation queries the response was YES. [2023-11-28 20:54:34,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62401 conditions, 17120 events. 9622/17120 cut-off events. For 31406/31970 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 121885 event pairs, 5266 based on Foata normal form. 0/15443 useless extension candidates. Maximal degree in co-relation 62330. Up to 6269 conditions per place. [2023-11-28 20:54:34,989 INFO L140 encePairwiseOnDemand]: 66/79 looper letters, 547 selfloop transitions, 257 changer transitions 3/810 dead transitions. [2023-11-28 20:54:34,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 810 transitions, 9993 flow [2023-11-28 20:54:34,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-28 20:54:34,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-28 20:54:34,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 327 transitions. [2023-11-28 20:54:34,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.19710669077757687 [2023-11-28 20:54:34,993 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 327 transitions. [2023-11-28 20:54:34,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 327 transitions. [2023-11-28 20:54:34,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:54:34,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 327 transitions. [2023-11-28 20:54:34,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 15.571428571428571) internal successors, (327), 21 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:54:34,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 79.0) internal successors, (1738), 22 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:54:34,998 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 79.0) internal successors, (1738), 22 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:54:34,999 INFO L175 Difference]: Start difference. First operand has 222 places, 591 transitions, 6835 flow. Second operand 21 states and 327 transitions. [2023-11-28 20:54:34,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 810 transitions, 9993 flow [2023-11-28 20:54:35,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 810 transitions, 9942 flow, removed 23 selfloop flow, removed 4 redundant places. [2023-11-28 20:54:35,329 INFO L231 Difference]: Finished difference. Result has 238 places, 644 transitions, 7857 flow [2023-11-28 20:54:35,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=6804, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7857, PETRI_PLACES=238, PETRI_TRANSITIONS=644} [2023-11-28 20:54:35,330 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 162 predicate places. [2023-11-28 20:54:35,330 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 644 transitions, 7857 flow [2023-11-28 20:54:35,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.235294117647059) internal successors, (123), 17 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) [2023-11-28 20:54:35,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:54:35,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:54:35,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2023-11-28 20:54:35,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:54:35,531 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:54:35,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:54:35,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2043082549, now seen corresponding path program 1 times [2023-11-28 20:54:35,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:54:35,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378720203] [2023-11-28 20:54:35,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:54:35,532 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 [2023-11-28 20:54:35,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:54:35,533 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:54:35,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-11-28 20:54:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:54:35,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 20:54:35,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:54:35,950 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 [2023-11-28 20:54:35,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:54:35,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-28 20:54:35,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:54:35,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-28 20:54:36,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:54:36,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-28 20:54:36,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:54:36,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-28 20:54:36,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:54:36,021 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 [2023-11-28 20:54:36,078 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-28 20:54:36,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-28 20:54:36,132 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2023-11-28 20:54:36,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-11-28 20:54:36,195 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-11-28 20:54:36,195 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 18 treesize of output 28 [2023-11-28 20:54:36,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:54:36,348 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:54:36,348 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:54:36,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378720203] [2023-11-28 20:54:36,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378720203] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:54:36,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:54:36,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:54:36,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681358217] [2023-11-28 20:54:36,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:54:36,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:54:36,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:54:36,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:54:36,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:54:36,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 79 [2023-11-28 20:54:36,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 644 transitions, 7857 flow. Second operand has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:54:36,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:54:36,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 79 [2023-11-28 20:54:36,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:54:40,563 INFO L124 PetriNetUnfolderBase]: 4840/10760 cut-off events. [2023-11-28 20:54:40,564 INFO L125 PetriNetUnfolderBase]: For 26538/26873 co-relation queries the response was YES. [2023-11-28 20:54:40,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44052 conditions, 10760 events. 4840/10760 cut-off events. For 26538/26873 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 86912 event pairs, 2854 based on Foata normal form. 384/10913 useless extension candidates. Maximal degree in co-relation 43981. Up to 7567 conditions per place. [2023-11-28 20:54:40,645 INFO L140 encePairwiseOnDemand]: 72/79 looper letters, 421 selfloop transitions, 203 changer transitions 0/642 dead transitions. [2023-11-28 20:54:40,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 642 transitions, 9101 flow [2023-11-28 20:54:40,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:54:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 20:54:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 210 transitions. [2023-11-28 20:54:40,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5316455696202531 [2023-11-28 20:54:40,648 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 210 transitions. [2023-11-28 20:54:40,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 210 transitions. [2023-11-28 20:54:40,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:54:40,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 210 transitions. [2023-11-28 20:54:40,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:54:40,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:54:40,650 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:54:40,650 INFO L175 Difference]: Start difference. First operand has 238 places, 644 transitions, 7857 flow. Second operand 5 states and 210 transitions. [2023-11-28 20:54:40,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 642 transitions, 9101 flow [2023-11-28 20:54:40,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 642 transitions, 9040 flow, removed 22 selfloop flow, removed 1 redundant places. [2023-11-28 20:54:40,932 INFO L231 Difference]: Finished difference. Result has 239 places, 642 transitions, 8198 flow [2023-11-28 20:54:40,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=7792, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=8198, PETRI_PLACES=239, PETRI_TRANSITIONS=642} [2023-11-28 20:54:40,933 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 163 predicate places. [2023-11-28 20:54:40,933 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 642 transitions, 8198 flow [2023-11-28 20:54:40,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:54:40,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:54:40,934 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:54:40,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2023-11-28 20:54:41,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:54:41,134 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:54:41,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:54:41,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1352500888, now seen corresponding path program 2 times [2023-11-28 20:54:41,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:54:41,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654785760] [2023-11-28 20:54:41,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:54:41,136 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 [2023-11-28 20:54:41,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:54:41,137 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:54:41,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-11-28 20:54:41,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:54:41,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:54:41,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-28 20:54:41,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:54:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:54:47,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:54:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:54:50,285 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:54:50,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654785760] [2023-11-28 20:54:50,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654785760] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:54:50,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:54:50,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-11-28 20:54:50,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414164429] [2023-11-28 20:54:50,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:54:50,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-28 20:54:50,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:54:50,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-28 20:54:50,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2023-11-28 20:54:54,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2023-11-28 20:54:54,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 642 transitions, 8198 flow. Second operand has 24 states, 24 states have (on average 48.583333333333336) internal successors, (1166), 24 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:54:54,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:54:54,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2023-11-28 20:54:54,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:55:15,082 INFO L124 PetriNetUnfolderBase]: 4077/10801 cut-off events. [2023-11-28 20:55:15,082 INFO L125 PetriNetUnfolderBase]: For 27619/27844 co-relation queries the response was YES. [2023-11-28 20:55:15,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46607 conditions, 10801 events. 4077/10801 cut-off events. For 27619/27844 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 97909 event pairs, 1546 based on Foata normal form. 142/10402 useless extension candidates. Maximal degree in co-relation 46535. Up to 2109 conditions per place. [2023-11-28 20:55:15,176 INFO L140 encePairwiseOnDemand]: 64/79 looper letters, 908 selfloop transitions, 395 changer transitions 23/1357 dead transitions. [2023-11-28 20:55:15,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 1357 transitions, 19275 flow [2023-11-28 20:55:15,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-28 20:55:15,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-28 20:55:15,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1980 transitions. [2023-11-28 20:55:15,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595602931379081 [2023-11-28 20:55:15,182 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1980 transitions. [2023-11-28 20:55:15,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1980 transitions. [2023-11-28 20:55:15,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:55:15,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1980 transitions. [2023-11-28 20:55:15,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.10526315789474) internal successors, (1980), 38 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:55:15,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 79.0) internal successors, (3081), 39 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:55:15,192 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 79.0) internal successors, (3081), 39 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:55:15,192 INFO L175 Difference]: Start difference. First operand has 239 places, 642 transitions, 8198 flow. Second operand 38 states and 1980 transitions. [2023-11-28 20:55:15,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 1357 transitions, 19275 flow [2023-11-28 20:55:15,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 1357 transitions, 18495 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-28 20:55:15,580 INFO L231 Difference]: Finished difference. Result has 288 places, 909 transitions, 13276 flow [2023-11-28 20:55:15,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=7792, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=13276, PETRI_PLACES=288, PETRI_TRANSITIONS=909} [2023-11-28 20:55:15,582 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 212 predicate places. [2023-11-28 20:55:15,582 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 909 transitions, 13276 flow [2023-11-28 20:55:15,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 48.583333333333336) internal successors, (1166), 24 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:55:15,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:55:15,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:55:15,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2023-11-28 20:55:15,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:55:15,783 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:55:15,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:55:15,784 INFO L85 PathProgramCache]: Analyzing trace with hash 396867616, now seen corresponding path program 1 times [2023-11-28 20:55:15,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:55:15,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546435039] [2023-11-28 20:55:15,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:55:15,784 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 [2023-11-28 20:55:15,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:55:15,785 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:55:15,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-11-28 20:55:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:55:16,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-28 20:55:16,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:55:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:55:22,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:55:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:55:25,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:55:25,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546435039] [2023-11-28 20:55:25,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546435039] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:55:25,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:55:25,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2023-11-28 20:55:25,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989891634] [2023-11-28 20:55:25,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:55:25,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-28 20:55:25,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:55:25,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-28 20:55:25,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2023-11-28 20:55:34,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2023-11-28 20:55:34,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 909 transitions, 13276 flow. Second operand has 22 states, 22 states have (on average 48.54545454545455) internal successors, (1068), 22 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:55:34,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:55:34,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2023-11-28 20:55:34,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:55:51,474 INFO L124 PetriNetUnfolderBase]: 4280/10800 cut-off events. [2023-11-28 20:55:51,474 INFO L125 PetriNetUnfolderBase]: For 45035/46731 co-relation queries the response was YES. [2023-11-28 20:55:51,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52570 conditions, 10800 events. 4280/10800 cut-off events. For 45035/46731 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 94456 event pairs, 1988 based on Foata normal form. 85/10410 useless extension candidates. Maximal degree in co-relation 52482. Up to 3957 conditions per place. [2023-11-28 20:55:51,578 INFO L140 encePairwiseOnDemand]: 62/79 looper letters, 306 selfloop transitions, 745 changer transitions 87/1169 dead transitions. [2023-11-28 20:55:51,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 1169 transitions, 18718 flow [2023-11-28 20:55:51,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-28 20:55:51,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-28 20:55:51,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1780 transitions. [2023-11-28 20:55:51,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64376130198915 [2023-11-28 20:55:51,583 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1780 transitions. [2023-11-28 20:55:51,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1780 transitions. [2023-11-28 20:55:51,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:55:51,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1780 transitions. [2023-11-28 20:55:51,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 50.857142857142854) internal successors, (1780), 35 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:55:51,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 79.0) internal successors, (2844), 36 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:55:51,590 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 79.0) internal successors, (2844), 36 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:55:51,590 INFO L175 Difference]: Start difference. First operand has 288 places, 909 transitions, 13276 flow. Second operand 35 states and 1780 transitions. [2023-11-28 20:55:51,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 1169 transitions, 18718 flow [2023-11-28 20:55:52,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 1169 transitions, 18666 flow, removed 22 selfloop flow, removed 3 redundant places. [2023-11-28 20:55:52,164 INFO L231 Difference]: Finished difference. Result has 329 places, 1029 transitions, 17261 flow [2023-11-28 20:55:52,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=13246, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=631, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=17261, PETRI_PLACES=329, PETRI_TRANSITIONS=1029} [2023-11-28 20:55:52,165 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 253 predicate places. [2023-11-28 20:55:52,166 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 1029 transitions, 17261 flow [2023-11-28 20:55:52,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 48.54545454545455) internal successors, (1068), 22 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:55:52,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:55:52,166 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:55:52,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-11-28 20:55:52,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:55:52,366 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:55:52,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:55:52,367 INFO L85 PathProgramCache]: Analyzing trace with hash 602301563, now seen corresponding path program 1 times [2023-11-28 20:55:52,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:55:52,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044562388] [2023-11-28 20:55:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:55:52,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:55:52,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:55:52,368 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:55:52,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-11-28 20:55:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:55:52,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 20:55:52,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:55:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:55:52,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:55:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:55:53,354 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:55:53,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044562388] [2023-11-28 20:55:53,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044562388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:55:53,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:55:53,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-28 20:55:53,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411244522] [2023-11-28 20:55:53,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:55:53,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 20:55:53,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:55:53,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 20:55:53,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:55:53,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2023-11-28 20:55:53,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 1029 transitions, 17261 flow. Second operand has 14 states, 14 states have (on average 49.57142857142857) internal successors, (694), 14 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:55:53,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:55:53,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2023-11-28 20:55:53,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:56:00,546 INFO L124 PetriNetUnfolderBase]: 4303/11634 cut-off events. [2023-11-28 20:56:00,546 INFO L125 PetriNetUnfolderBase]: For 47252/47583 co-relation queries the response was YES. [2023-11-28 20:56:00,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62454 conditions, 11634 events. 4303/11634 cut-off events. For 47252/47583 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 107870 event pairs, 1005 based on Foata normal form. 167/11235 useless extension candidates. Maximal degree in co-relation 62355. Up to 5229 conditions per place. [2023-11-28 20:56:00,677 INFO L140 encePairwiseOnDemand]: 66/79 looper letters, 1099 selfloop transitions, 199 changer transitions 6/1335 dead transitions. [2023-11-28 20:56:00,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1335 transitions, 24259 flow [2023-11-28 20:56:00,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-28 20:56:00,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-28 20:56:00,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 612 transitions. [2023-11-28 20:56:00,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7042577675489068 [2023-11-28 20:56:00,680 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 612 transitions. [2023-11-28 20:56:00,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 612 transitions. [2023-11-28 20:56:00,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:56:00,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 612 transitions. [2023-11-28 20:56:00,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 55.63636363636363) internal successors, (612), 11 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:56:00,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 79.0) internal successors, (948), 12 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:56:00,682 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 79.0) internal successors, (948), 12 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:56:00,682 INFO L175 Difference]: Start difference. First operand has 329 places, 1029 transitions, 17261 flow. Second operand 11 states and 612 transitions. [2023-11-28 20:56:00,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 1335 transitions, 24259 flow [2023-11-28 20:56:01,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1335 transitions, 23901 flow, removed 98 selfloop flow, removed 11 redundant places. [2023-11-28 20:56:01,671 INFO L231 Difference]: Finished difference. Result has 333 places, 1133 transitions, 19829 flow [2023-11-28 20:56:01,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=17018, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1029, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=830, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19829, PETRI_PLACES=333, PETRI_TRANSITIONS=1133} [2023-11-28 20:56:01,673 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 257 predicate places. [2023-11-28 20:56:01,673 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 1133 transitions, 19829 flow [2023-11-28 20:56:01,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 49.57142857142857) internal successors, (694), 14 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:56:01,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:56:01,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:56:01,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2023-11-28 20:56:01,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:56:01,873 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:56:01,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:56:01,874 INFO L85 PathProgramCache]: Analyzing trace with hash -2091649597, now seen corresponding path program 1 times [2023-11-28 20:56:01,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:56:01,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300846065] [2023-11-28 20:56:01,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:56:01,874 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 [2023-11-28 20:56:01,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:56:01,875 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:56:01,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-11-28 20:56:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:56:02,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-28 20:56:02,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:56:02,307 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 [2023-11-28 20:56:02,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-28 20:56:02,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:56:02,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-28 20:56:02,415 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-28 20:56:02,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-28 20:56:02,484 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-28 20:56:02,485 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 13 [2023-11-28 20:56:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:56:02,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:56:07,076 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (bvmul (_ bv4 32) c_thread2Thread1of1ForFork1_~j~0))) (and (forall ((~M~0 (_ BitVec 32))) (let ((.cse1 (bvmul (_ bv4 32) (bvmul ~M~0 c_thread2Thread1of1ForFork1_~i~1)))) (bvule (bvadd .cse0 c_~F~0.offset .cse1) (bvadd .cse0 c_~F~0.offset (_ bv4 32) .cse1)))) (forall ((~M~0 (_ BitVec 32))) (bvule (bvadd .cse0 c_~F~0.offset (_ bv4 32) (bvmul (_ bv4 32) (bvmul ~M~0 c_thread2Thread1of1ForFork1_~i~1))) (select |c_#length| c_~F~0.base))))) is different from false [2023-11-28 20:56:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:56:14,371 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:56:14,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300846065] [2023-11-28 20:56:14,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300846065] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:56:14,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:56:14,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-28 20:56:14,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262546805] [2023-11-28 20:56:14,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:56:14,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-28 20:56:14,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:56:14,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-28 20:56:14,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=135, Unknown=2, NotChecked=24, Total=210 [2023-11-28 20:56:17,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 79 [2023-11-28 20:56:17,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 1133 transitions, 19829 flow. Second operand has 15 states, 15 states have (on average 7.866666666666666) internal successors, (118), 15 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:56:17,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:56:17,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 79 [2023-11-28 20:56:17,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:56:37,877 INFO L124 PetriNetUnfolderBase]: 18588/32487 cut-off events. [2023-11-28 20:56:37,878 INFO L125 PetriNetUnfolderBase]: For 198197/203735 co-relation queries the response was YES. [2023-11-28 20:56:38,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151127 conditions, 32487 events. 18588/32487 cut-off events. For 198197/203735 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 254697 event pairs, 7960 based on Foata normal form. 633/30316 useless extension candidates. Maximal degree in co-relation 151026. Up to 12206 conditions per place. [2023-11-28 20:56:38,307 INFO L140 encePairwiseOnDemand]: 65/79 looper letters, 1037 selfloop transitions, 338 changer transitions 1/1380 dead transitions. [2023-11-28 20:56:38,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1380 transitions, 25751 flow [2023-11-28 20:56:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 20:56:38,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-28 20:56:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2023-11-28 20:56:38,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2714486638537271 [2023-11-28 20:56:38,309 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 193 transitions. [2023-11-28 20:56:38,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 193 transitions. [2023-11-28 20:56:38,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:56:38,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 193 transitions. [2023-11-28 20:56:38,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 21.444444444444443) internal successors, (193), 9 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:56:38,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 79.0) internal successors, (790), 10 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:56:38,311 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 79.0) internal successors, (790), 10 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:56:38,311 INFO L175 Difference]: Start difference. First operand has 333 places, 1133 transitions, 19829 flow. Second operand 9 states and 193 transitions. [2023-11-28 20:56:38,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1380 transitions, 25751 flow [2023-11-28 20:56:39,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 1380 transitions, 25697 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-11-28 20:56:39,667 INFO L231 Difference]: Finished difference. Result has 341 places, 1147 transitions, 20690 flow [2023-11-28 20:56:39,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=19791, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20690, PETRI_PLACES=341, PETRI_TRANSITIONS=1147} [2023-11-28 20:56:39,669 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 265 predicate places. [2023-11-28 20:56:39,669 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 1147 transitions, 20690 flow [2023-11-28 20:56:39,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.866666666666666) internal successors, (118), 15 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:56:39,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:56:39,670 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2023-11-28 20:56:39,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2023-11-28 20:56:39,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 20:56:39,870 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-11-28 20:56:39,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:56:39,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1128200415, now seen corresponding path program 3 times [2023-11-28 20:56:39,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:56:39,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212817775] [2023-11-28 20:56:39,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:56:39,871 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 [2023-11-28 20:56:39,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:56:39,872 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-28 20:56:39,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22e05cda-c9b8-4ece-ac7a-c79afc9561ab/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-11-28 20:56:40,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-28 20:56:40,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:56:40,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-28 20:56:40,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:56:40,900 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 [2023-11-28 20:56:40,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:56:40,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-28 20:56:40,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:56:40,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-28 20:56:40,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:56:40,962 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 [2023-11-28 20:56:40,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:56:40,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-28 20:56:40,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:56:40,994 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 [2023-11-28 20:56:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:56:42,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:56:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:56:48,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:56:48,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212817775] [2023-11-28 20:56:48,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212817775] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:56:48,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:56:48,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-11-28 20:56:48,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937593788] [2023-11-28 20:56:48,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:56:48,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-28 20:56:48,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:56:48,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-28 20:56:48,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2023-11-28 20:57:38,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2023-11-28 20:57:38,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 1147 transitions, 20690 flow. Second operand has 26 states, 26 states have (on average 46.76923076923077) internal successors, (1216), 26 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:57:38,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:57:38,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2023-11-28 20:57:38,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand